Polishing

spring-aop/src/main/java/org/springframework/aop/framework/CglibAopProxy.java

@@ -291,20 +291,20 @@ class CglibAopProxy implements AopProxy, Serializable {
 		// unadvised but can return this). May be required to expose the proxy.
 		Callback targetInterceptor;
 		if (exposeProxy) {
-			targetInterceptor = isStatic ?
+			targetInterceptor = (isStatic ?
 					new StaticUnadvisedExposedInterceptor(this.advised.getTargetSource().getTarget()) :
-					new DynamicUnadvisedExposedInterceptor(this.advised.getTargetSource());
+					new DynamicUnadvisedExposedInterceptor(this.advised.getTargetSource()));
 		}
 		else {
-			targetInterceptor = isStatic ?
+			targetInterceptor = (isStatic ?
 					new StaticUnadvisedInterceptor(this.advised.getTargetSource().getTarget()) :
-					new DynamicUnadvisedInterceptor(this.advised.getTargetSource());
+					new DynamicUnadvisedInterceptor(this.advised.getTargetSource()));
 		}
 
 		// Choose a "direct to target" dispatcher (used for
 		// unadvised calls to static targets that cannot return this).
-		Callback targetDispatcher = isStatic ?
+		Callback targetDispatcher = (isStatic ?
-				new StaticDispatcher(this.advised.getTargetSource().getTarget()) : new SerializableNoOp();
+				new StaticDispatcher(this.advised.getTargetSource().getTarget()) : new SerializableNoOp());
 
 		Callback[] mainCallbacks = new Callback[] {
 				aopInterceptor,  // for normal advice

spring-aop/src/main/java/org/springframework/aop/support/ControlFlowPointcut.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -131,7 +131,7 @@ public class ControlFlowPointcut implements Pointcut, ClassFilter, MethodMatcher
 			return false;
 		}
 		ControlFlowPointcut that = (ControlFlowPointcut) other;
-		return (this.clazz.equals(that.clazz)) && ObjectUtils.nullSafeEquals(that.methodName, this.methodName);
+		return (this.clazz.equals(that.clazz)) && ObjectUtils.nullSafeEquals(this.methodName, that.methodName);
 	}
 
 	@Override

spring-aop/src/main/java/org/springframework/aop/support/MethodMatchers.java

@@ -144,14 +144,14 @@ public abstract class MethodMatchers {
 		}
 
 		@Override
-		public boolean equals(Object obj) {
+		public boolean equals(Object other) {
-			if (this == obj) {
+			if (this == other) {
 				return true;
 			}
-			if (!(obj instanceof UnionMethodMatcher)) {
+			if (!(other instanceof UnionMethodMatcher)) {
 				return false;
 			}
-			UnionMethodMatcher that = (UnionMethodMatcher) obj;
+			UnionMethodMatcher that = (UnionMethodMatcher) other;
 			return (this.mm1.equals(that.mm1) && this.mm2.equals(that.mm2));
 		}
 
@@ -239,18 +239,18 @@ public abstract class MethodMatchers {
 
 		@Override
 		public boolean matches(Method method, @Nullable Class<?> targetClass, boolean hasIntroductions) {
-			return MethodMatchers.matches(this.mm1, method, targetClass, hasIntroductions) &&
+			return (MethodMatchers.matches(this.mm1, method, targetClass, hasIntroductions) &&
-					MethodMatchers.matches(this.mm2, method, targetClass, hasIntroductions);
+					MethodMatchers.matches(this.mm2, method, targetClass, hasIntroductions));
 		}
 
 		@Override
 		public boolean matches(Method method, @Nullable Class<?> targetClass) {
-			return this.mm1.matches(method, targetClass) && this.mm2.matches(method, targetClass);
+			return (this.mm1.matches(method, targetClass) && this.mm2.matches(method, targetClass));
 		}
 
 		@Override
 		public boolean isRuntime() {
-			return this.mm1.isRuntime() || this.mm2.isRuntime();
+			return (this.mm1.isRuntime() || this.mm2.isRuntime());
 		}
 
 		@Override
@@ -258,10 +258,10 @@ public abstract class MethodMatchers {
 			// Because a dynamic intersection may be composed of a static and dynamic part,
 			// we must avoid calling the 3-arg matches method on a dynamic matcher, as
 			// it will probably be an unsupported operation.
-			boolean aMatches = this.mm1.isRuntime() ?
+			boolean aMatches = (this.mm1.isRuntime() ?
-					this.mm1.matches(method, targetClass, args) : this.mm1.matches(method, targetClass);
+					this.mm1.matches(method, targetClass, args) : this.mm1.matches(method, targetClass));
-			boolean bMatches = this.mm2.isRuntime() ?
+			boolean bMatches = (this.mm2.isRuntime() ?
-					this.mm2.matches(method, targetClass, args) : this.mm2.matches(method, targetClass);
+					this.mm2.matches(method, targetClass, args) : this.mm2.matches(method, targetClass));
 			return aMatches && bMatches;
 		}
 

spring-beans/src/main/java/org/springframework/beans/MutablePropertyValues.java

@@ -348,14 +348,8 @@ public class MutablePropertyValues implements PropertyValues, Serializable {
 
 	@Override
 	public boolean equals(Object other) {
-		if (this == other) {
+		return (this == other || (other instanceof MutablePropertyValues &&
-			return true;
+				this.propertyValueList.equals(((MutablePropertyValues) other).propertyValueList)));
-		}
-		if (!(other instanceof MutablePropertyValues)) {
-			return false;
-		}
-		MutablePropertyValues that = (MutablePropertyValues) other;
-		return this.propertyValueList.equals(that.propertyValueList);
 	}
 
 	@Override

spring-beans/src/main/java/org/springframework/beans/factory/CannotLoadBeanClassException.java

@@ -32,7 +32,6 @@ public class CannotLoadBeanClassException extends FatalBeanException {
 	@Nullable
 	private final String resourceDescription;
 
-	@Nullable
 	private final String beanName;
 
 	@Nullable
@@ -47,8 +46,8 @@ public class CannotLoadBeanClassException extends FatalBeanException {
 	 * @param beanClassName the name of the bean class
 	 * @param cause the root cause
 	 */
-	public CannotLoadBeanClassException(
+	public CannotLoadBeanClassException(@Nullable String resourceDescription, String beanName,
-			@Nullable String resourceDescription, String beanName, @Nullable String beanClassName, ClassNotFoundException cause) {
+			@Nullable String beanClassName, ClassNotFoundException cause) {
 
 		super("Cannot find class [" + beanClassName + "] for bean with name '" + beanName + "'" +
 				(resourceDescription != null ? " defined in " + resourceDescription : ""), cause);
@@ -65,8 +64,8 @@ public class CannotLoadBeanClassException extends FatalBeanException {
 	 * @param beanClassName the name of the bean class
 	 * @param cause the root cause
 	 */
-	public CannotLoadBeanClassException(
+	public CannotLoadBeanClassException(@Nullable String resourceDescription, String beanName,
-			@Nullable String resourceDescription, String beanName, @Nullable String beanClassName, LinkageError cause) {
+			@Nullable String beanClassName, LinkageError cause) {
 
 		super("Error loading class [" + beanClassName + "] for bean with name '" + beanName + "'" +
 				(resourceDescription != null ? " defined in " + resourceDescription : "") +
@@ -89,7 +88,6 @@ public class CannotLoadBeanClassException extends FatalBeanException {
 	/**
 	 * Return the name of the bean requested.
 	 */
-	@Nullable
 	public String getBeanName() {
 		return this.beanName;
 	}

spring-beans/src/main/java/org/springframework/beans/factory/config/FieldRetrievingFactoryBean.java

@@ -203,7 +203,7 @@ public class FieldRetrievingFactoryBean
 		}
 
 		// Try to get the exact method first.
-		Class<?> targetClass = (this.targetObject != null) ? this.targetObject.getClass() : this.targetClass;
+		Class<?> targetClass = (this.targetObject != null ? this.targetObject.getClass() : this.targetClass);
 		this.fieldObject = targetClass.getField(this.targetField);
 	}
 

spring-beans/src/main/java/org/springframework/beans/factory/groovy/GroovyBeanDefinitionReader.java

@@ -374,7 +374,6 @@ public class GroovyBeanDefinitionReader extends AbstractBeanDefinitionReader imp
 			if (args[0] == null) {
 				throw new IllegalArgumentException("Argument to ref() is not a valid bean or was not found");
 			}
-
 			if (args[0] instanceof RuntimeBeanReference) {
 				refName = ((RuntimeBeanReference) args[0]).getBeanName();
 			}
@@ -490,11 +489,11 @@ public class GroovyBeanDefinitionReader extends AbstractBeanDefinitionReader imp
 				Map.Entry factoryBeanEntry = (Map.Entry) ((Map) args[0]).entrySet().iterator().next();
 				// If we have a closure body, that will be the last argument.
 				// In between are the constructor args
-				int constructorArgsTest = hasClosureArgument?2:1;
+				int constructorArgsTest = (hasClosureArgument ? 2 : 1);
 				// If we have more than this number of args, we have constructor args
 				if (args.length > constructorArgsTest){
 					// factory-method requires args
-					int endOfConstructArgs = (hasClosureArgument? args.length - 1 : args.length);
+					int endOfConstructArgs = (hasClosureArgument ? args.length - 1 : args.length);
 					this.currentBeanDefinition = new GroovyBeanDefinitionWrapper(beanName, null,
 							resolveConstructorArguments(args, 1, endOfConstructArgs));
 				}

spring-beans/src/main/java/org/springframework/beans/factory/parsing/ParseState.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -82,7 +82,7 @@ public final class ParseState {
 	 */
 	@Nullable
 	public Entry peek() {
-		return this.state.isEmpty() ? null : this.state.peek();
+		return this.state.peek();
 	}
 
 	/**

spring-beans/src/main/java/org/springframework/beans/factory/support/AbstractBeanDefinition.java

@@ -1114,39 +1114,38 @@ public abstract class AbstractBeanDefinition extends BeanMetadataAttributeAccess
 	public abstract AbstractBeanDefinition cloneBeanDefinition();
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (!(obj instanceof AbstractBeanDefinition)) {
+		if (!(other instanceof AbstractBeanDefinition)) {
 			return false;
 		}
-		AbstractBeanDefinition other = (AbstractBeanDefinition) obj;
+		AbstractBeanDefinition that = (AbstractBeanDefinition) other;
-		boolean rtn = true;
+		boolean rtn = ObjectUtils.nullSafeEquals(getBeanClassName(), that.getBeanClassName());
-		rtn = rtn &= ObjectUtils.nullSafeEquals(getBeanClassName(), other.getBeanClassName());
+		rtn = rtn &= ObjectUtils.nullSafeEquals(this.scope, that.scope);
-		rtn = rtn &= ObjectUtils.nullSafeEquals(this.scope, other.scope);
+		rtn = rtn &= this.abstractFlag == that.abstractFlag;
-		rtn = rtn &= this.abstractFlag == other.abstractFlag;
+		rtn = rtn &= this.lazyInit == that.lazyInit;
-		rtn = rtn &= this.lazyInit == other.lazyInit;
+		rtn = rtn &= this.autowireMode == that.autowireMode;
-		rtn = rtn &= this.autowireMode == other.autowireMode;
+		rtn = rtn &= this.dependencyCheck == that.dependencyCheck;
-		rtn = rtn &= this.dependencyCheck == other.dependencyCheck;
+		rtn = rtn &= Arrays.equals(this.dependsOn, that.dependsOn);
-		rtn = rtn &= Arrays.equals(this.dependsOn, other.dependsOn);
+		rtn = rtn &= this.autowireCandidate == that.autowireCandidate;
-		rtn = rtn &= this.autowireCandidate == other.autowireCandidate;
+		rtn = rtn &= ObjectUtils.nullSafeEquals(this.qualifiers, that.qualifiers);
-		rtn = rtn &= ObjectUtils.nullSafeEquals(this.qualifiers, other.qualifiers);
+		rtn = rtn &= this.primary == that.primary;
-		rtn = rtn &= this.primary == other.primary;
+		rtn = rtn &= this.nonPublicAccessAllowed == that.nonPublicAccessAllowed;
-		rtn = rtn &= this.nonPublicAccessAllowed == other.nonPublicAccessAllowed;
+		rtn = rtn &= this.lenientConstructorResolution == that.lenientConstructorResolution;
-		rtn = rtn &= this.lenientConstructorResolution == other.lenientConstructorResolution;
+		rtn = rtn &= ObjectUtils.nullSafeEquals(this.constructorArgumentValues, that.constructorArgumentValues);
-		rtn = rtn &= ObjectUtils.nullSafeEquals(this.constructorArgumentValues, other.constructorArgumentValues);
+		rtn = rtn &= ObjectUtils.nullSafeEquals(this.propertyValues, that.propertyValues);
-		rtn = rtn &= ObjectUtils.nullSafeEquals(this.propertyValues, other.propertyValues);
+		rtn = rtn &= ObjectUtils.nullSafeEquals(this.methodOverrides, that.methodOverrides);
-		rtn = rtn &= ObjectUtils.nullSafeEquals(this.methodOverrides, other.methodOverrides);
+		rtn = rtn &= ObjectUtils.nullSafeEquals(this.factoryBeanName, that.factoryBeanName);
-		rtn = rtn &= ObjectUtils.nullSafeEquals(this.factoryBeanName, other.factoryBeanName);
+		rtn = rtn &= ObjectUtils.nullSafeEquals(this.factoryMethodName, that.factoryMethodName);
-		rtn = rtn &= ObjectUtils.nullSafeEquals(this.factoryMethodName, other.factoryMethodName);
+		rtn = rtn &= ObjectUtils.nullSafeEquals(this.initMethodName, that.initMethodName);
-		rtn = rtn &= ObjectUtils.nullSafeEquals(this.initMethodName, other.initMethodName);
+		rtn = rtn &= this.enforceInitMethod == that.enforceInitMethod;
-		rtn = rtn &= this.enforceInitMethod == other.enforceInitMethod;
+		rtn = rtn &= ObjectUtils.nullSafeEquals(this.destroyMethodName, that.destroyMethodName);
-		rtn = rtn &= ObjectUtils.nullSafeEquals(this.destroyMethodName, other.destroyMethodName);
+		rtn = rtn &= this.enforceDestroyMethod == that.enforceDestroyMethod;
-		rtn = rtn &= this.enforceDestroyMethod == other.enforceDestroyMethod;
+		rtn = rtn &= this.synthetic == that.synthetic;
-		rtn = rtn &= this.synthetic == other.synthetic;
+		rtn = rtn &= this.role == that.role;
-		rtn = rtn &= this.role == other.role;
+		return rtn && super.equals(other);
-		return rtn && super.equals(obj);
 	}
 
 	@Override

spring-beans/src/main/java/org/springframework/beans/factory/support/BeanDefinitionResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -80,10 +80,9 @@ class BeanDefinitionResource extends AbstractResource {
 	 * This implementation compares the underlying BeanDefinition.
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj == this ||
+		return (this == other || (other instanceof BeanDefinitionResource &&
-			(obj instanceof BeanDefinitionResource &&
+				((BeanDefinitionResource) other).beanDefinition.equals(this.beanDefinition)));
-						((BeanDefinitionResource) obj).beanDefinition.equals(this.beanDefinition)));
 	}
 
 	/**

spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java

@@ -1521,8 +1521,8 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 					isAutowireCandidate(beanName, mbd, descriptor, getAutowireCandidateResolver())) {
 				// Probably a proxy interfering with target type match -> throw meaningful exception.
 				Object beanInstance = getSingleton(beanName, false);
-				Class<?> beanType = (beanInstance != null && beanInstance.getClass() != NullBean.class) ?
+				Class<?> beanType = (beanInstance != null && beanInstance.getClass() != NullBean.class ?
-						beanInstance.getClass() : predictBeanType(beanName, mbd);
+						beanInstance.getClass() : predictBeanType(beanName, mbd));
 				if (beanType != null && !type.isAssignableFrom(beanType)) {
 					throw new BeanNotOfRequiredTypeException(beanName, type, beanType);
 				}

spring-beans/src/main/java/org/springframework/beans/factory/xml/BeanDefinitionParserDelegate.java

@@ -900,9 +900,9 @@ public class BeanDefinitionParserDelegate {
 	 */
 	@Nullable
 	public Object parsePropertyValue(Element ele, BeanDefinition bd, @Nullable String propertyName) {
-		String elementName = (propertyName != null) ?
+		String elementName = (propertyName != null ?
 				"<property> element for property '" + propertyName + "'" :
-						"<constructor-arg> element";
+				"<constructor-arg> element");
 
 		// Should only have one child element: ref, value, list, etc.
 		NodeList nl = ele.getChildNodes();

spring-context-indexer/src/main/java/org/springframework/context/index/CandidateComponentsIndexer.java

@@ -46,8 +46,7 @@ import javax.lang.model.element.TypeElement;
 public class CandidateComponentsIndexer implements Processor {
 
 	private static final Set<ElementKind> TYPE_KINDS =
-			Collections.unmodifiableSet(EnumSet.of(ElementKind.CLASS,
+			Collections.unmodifiableSet(EnumSet.of(ElementKind.CLASS, ElementKind.INTERFACE));
-					ElementKind.INTERFACE));
 
 	private MetadataStore metadataStore;
 
@@ -135,10 +134,9 @@ public class CandidateComponentsIndexer implements Processor {
 
 	private static List<TypeElement> staticTypesIn(Iterable<? extends Element> elements) {
 		List<TypeElement> list = new ArrayList<>();
-		for (Element e : elements) {
+		for (Element element : elements) {
-			if (TYPE_KINDS.contains(e.getKind())
+			if (TYPE_KINDS.contains(element.getKind()) && element.getModifiers().contains(Modifier.STATIC)) {
-					&& e.getModifiers().contains(Modifier.STATIC)) {
+				list.add(TypeElement.class.cast(element));
-				list.add(TypeElement.class.cast(e));
 			}
 		}
 		return list;

spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/AbstractJCacheOperation.java

@@ -19,6 +19,7 @@ package org.springframework.cache.jcache.interceptor;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.LinkedHashSet;
 import java.util.List;
@@ -32,8 +33,6 @@ import org.springframework.cache.interceptor.CacheResolver;
 import org.springframework.util.Assert;
 import org.springframework.util.ExceptionTypeFilter;
 
-import static java.util.Arrays.asList;
-
 /**
  * A base {@link JCacheOperation} implementation.
  *
@@ -56,8 +55,8 @@ abstract class AbstractJCacheOperation<A extends Annotation> implements JCacheOp
 	 * @param cacheResolver the cache resolver to resolve regular caches
 	 */
 	protected AbstractJCacheOperation(CacheMethodDetails<A> methodDetails, CacheResolver cacheResolver) {
-		Assert.notNull(methodDetails, "method details must not be null.");
+		Assert.notNull(methodDetails, "CacheMethodDetails must not be null");
-		Assert.notNull(cacheResolver, "cache resolver must not be null.");
+		Assert.notNull(cacheResolver, "CacheResolver must not be null");
 		this.methodDetails = methodDetails;
 		this.cacheResolver = cacheResolver;
 		this.allParameterDetails = initializeAllParameterDetails(methodDetails.getMethod());
@@ -117,7 +116,7 @@ abstract class AbstractJCacheOperation<A extends Annotation> implements JCacheOp
 	protected ExceptionTypeFilter createExceptionTypeFilter(
 			Class<? extends Throwable>[] includes, Class<? extends Throwable>[] excludes) {
 
-		return new ExceptionTypeFilter(asList(includes), asList(excludes), true);
+		return new ExceptionTypeFilter(Arrays.asList(includes), Arrays.asList(excludes), true);
 	}
 
 	@Override

spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/DefaultCacheMethodDetails.java

@@ -18,13 +18,12 @@ package org.springframework.cache.jcache.interceptor;
 
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.LinkedHashSet;
 import java.util.Set;
 import javax.cache.annotation.CacheMethodDetails;
 
-import static java.util.Arrays.asList;
-
 /**
  * The default {@link CacheMethodDetails} implementation.
  *
@@ -46,7 +45,7 @@ class DefaultCacheMethodDetails<A extends Annotation> implements CacheMethodDeta
 	public DefaultCacheMethodDetails(Method method, A cacheAnnotation, String cacheName) {
 		this.method = method;
 		this.annotations = Collections.unmodifiableSet(
-				new LinkedHashSet<>(asList(method.getAnnotations())));
+				new LinkedHashSet<>(Arrays.asList(method.getAnnotations())));
 		this.cacheAnnotation = cacheAnnotation;
 		this.cacheName = cacheName;
 	}

spring-context-support/src/main/java/org/springframework/scheduling/commonj/TimerManagerTaskScheduler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -151,7 +151,7 @@ public class TimerManagerTaskScheduler extends TimerManagerAccessor implements T
 				return 0;
 			}
 			long diff = getDelay(TimeUnit.MILLISECONDS) - other.getDelay(TimeUnit.MILLISECONDS);
-			return (diff == 0 ? 0 : ((diff < 0)? -1 : 1));
+			return (diff == 0 ? 0 : ((diff < 0) ? -1 : 1));
 		}
 	}
 

spring-context-support/src/main/java/org/springframework/scheduling/quartz/SchedulerFactoryBean.java

@@ -759,7 +759,7 @@ public class SchedulerFactoryBean extends SchedulerAccessor implements FactoryBe
 
 	@Override
 	public Class<? extends Scheduler> getObjectType() {
-		return (this.scheduler != null) ? this.scheduler.getClass() : Scheduler.class;
+		return (this.scheduler != null ? this.scheduler.getClass() : Scheduler.class);
 	}
 
 	@Override

spring-context/src/main/java/org/springframework/cache/interceptor/SimpleKey.java

@@ -32,12 +32,12 @@ import org.springframework.util.StringUtils;
 @SuppressWarnings("serial")
 public class SimpleKey implements Serializable {
 
-	/**
+	/** An empty key. */
-	 * An empty key.
-	 */
 	public static final SimpleKey EMPTY = new SimpleKey();
 
+
 	private final Object[] params;
+
 	private final int hashCode;
 
 
@@ -52,10 +52,11 @@ public class SimpleKey implements Serializable {
 		this.hashCode = Arrays.deepHashCode(this.params);
 	}
 
+
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (this == obj || (obj instanceof SimpleKey
+		return (this == other ||
-				&& Arrays.deepEquals(this.params, ((SimpleKey) obj).params)));
+				(other instanceof SimpleKey && Arrays.deepEquals(this.params, ((SimpleKey) other).params)));
 	}
 
 	@Override

spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassParser.java

@@ -553,7 +553,7 @@ class ConfigurationClassParser {
 		for (DeferredImportSelectorHolder deferredImport : deferredImports) {
 			Class<? extends Group> group = deferredImport.getImportSelector().getImportGroup();
 			DeferredImportSelectorGrouping grouping = groupings.computeIfAbsent(
-					(group == null ? deferredImport : group),
+					(group != null ? group : deferredImport),
 					key -> new DeferredImportSelectorGrouping(createGroup(group)));
 			grouping.add(deferredImport);
 			configurationClasses.put(deferredImport.getConfigurationClass().getMetadata(),
@@ -561,8 +561,7 @@ class ConfigurationClassParser {
 		}
 		for (DeferredImportSelectorGrouping grouping : groupings.values()) {
 			grouping.getImports().forEach(entry -> {
-				ConfigurationClass configurationClass = configurationClasses.get(
+				ConfigurationClass configurationClass = configurationClasses.get(entry.getMetadata());
-						entry.getMetadata());
 				try {
 					processImports(configurationClass, asSourceClass(configurationClass),
 							asSourceClasses(entry.getImportClassName()), false);
@@ -580,8 +579,7 @@ class ConfigurationClassParser {
 	}
 
 	private Group createGroup(@Nullable Class<? extends Group> type) {
-		Class<? extends Group> effectiveType = (type != null ? type
+		Class<? extends Group> effectiveType = (type != null ? type : DefaultDeferredImportSelectorGroup.class);
-				: DefaultDeferredImportSelectorGroup.class);
 		Group group = BeanUtils.instantiateClass(effectiveType);
 		ParserStrategyUtils.invokeAwareMethods(group,
 				ConfigurationClassParser.this.environment,

spring-context/src/main/java/org/springframework/context/support/AbstractApplicationContext.java

@@ -1252,8 +1252,8 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 	 */
 	@Nullable
 	protected BeanFactory getInternalParentBeanFactory() {
-		return (getParent() instanceof ConfigurableApplicationContext) ?
+		return (getParent() instanceof ConfigurableApplicationContext ?
-				((ConfigurableApplicationContext) getParent()).getBeanFactory() : getParent();
+				((ConfigurableApplicationContext) getParent()).getBeanFactory() : getParent());
 	}
 
 
@@ -1295,8 +1295,8 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 	 */
 	@Nullable
 	protected MessageSource getInternalParentMessageSource() {
-		return (getParent() instanceof AbstractApplicationContext) ?
+		return (getParent() instanceof AbstractApplicationContext ?
-			((AbstractApplicationContext) getParent()).messageSource : getParent();
+			((AbstractApplicationContext) getParent()).messageSource : getParent());
 	}
 
 

spring-context/src/main/java/org/springframework/scheduling/support/PeriodicTrigger.java

@@ -144,16 +144,16 @@ public class PeriodicTrigger implements Trigger {
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (!(obj instanceof PeriodicTrigger)) {
+		if (!(other instanceof PeriodicTrigger)) {
 			return false;
 		}
-		PeriodicTrigger other = (PeriodicTrigger) obj;
+		PeriodicTrigger otherTrigger = (PeriodicTrigger) other;
-		return (this.fixedRate == other.fixedRate && this.initialDelay == other.initialDelay &&
+		return (this.fixedRate == otherTrigger.fixedRate && this.initialDelay == otherTrigger.initialDelay &&
-				this.period == other.period);
+				this.period == otherTrigger.period);
 	}
 
 	@Override

spring-context/src/main/java/org/springframework/validation/DataBinder.java

@@ -715,8 +715,8 @@ public class DataBinder implements PropertyEditorRegistry, TypeConverter {
 	 * @see #doBind(org.springframework.beans.MutablePropertyValues)
 	 */
 	public void bind(PropertyValues pvs) {
-		MutablePropertyValues mpvs = (pvs instanceof MutablePropertyValues) ?
+		MutablePropertyValues mpvs = (pvs instanceof MutablePropertyValues ?
-				(MutablePropertyValues) pvs : new MutablePropertyValues(pvs);
+				(MutablePropertyValues) pvs : new MutablePropertyValues(pvs));
 		doBind(mpvs);
 	}
 

spring-core/src/main/java/org/springframework/core/AttributeAccessorSupport.java

@@ -93,14 +93,8 @@ public abstract class AttributeAccessorSupport implements AttributeAccessor, Ser
 
 	@Override
 	public boolean equals(Object other) {
-		if (this == other) {
+		return (this == other || (other instanceof AttributeAccessorSupport &&
-			return true;
+				this.attributes.equals(((AttributeAccessorSupport) other).attributes)));
-		}
-		if (!(other instanceof AttributeAccessorSupport)) {
-			return false;
-		}
-		AttributeAccessorSupport that = (AttributeAccessorSupport) other;
-		return this.attributes.equals(that.attributes);
 	}
 
 	@Override

spring-core/src/main/java/org/springframework/core/ParameterizedTypeReference.java

@@ -66,9 +66,9 @@ public abstract class ParameterizedTypeReference<T> {
 	}
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (this == obj || (obj instanceof ParameterizedTypeReference &&
+		return (this == other || (other instanceof ParameterizedTypeReference &&
-				this.type.equals(((ParameterizedTypeReference<?>) obj).type)));
+				this.type.equals(((ParameterizedTypeReference<?>) other).type)));
 	}
 
 	@Override

spring-core/src/main/java/org/springframework/core/ReactiveAdapterRegistry.java

@@ -164,12 +164,10 @@ public class ReactiveAdapterRegistry {
 	/**
 	 * Return a shared default {@code ReactiveAdapterRegistry} instance, lazily
 	 * building it once needed.
-	 *
 	 * <p><b>NOTE:</b> We highly recommend passing a long-lived, pre-configured
 	 * {@code ReactiveAdapterRegistry} instance for customization purposes.
 	 * This accessor is only meant as a fallback for code paths that want to
 	 * fall back on a default instance if one isn't provided.
-	 *
 	 * @return the shared {@code ReactiveAdapterRegistry} instance (never {@code null})
 	 * @since 5.0.2
 	 */
@@ -191,7 +189,6 @@ public class ReactiveAdapterRegistry {
 	private static class ReactorRegistrar {
 
 		void registerAdapters(ReactiveAdapterRegistry registry) {
-
 			// Register Flux and Mono before Publisher...
 
 			registry.registerReactiveType(
@@ -280,7 +277,6 @@ public class ReactiveAdapterRegistry {
 	private static class ReactorJdkFlowAdapterRegistrar {
 
 		void registerAdapter(ReactiveAdapterRegistry registry) throws Exception {
-
 			// TODO: remove reflection when build requires JDK 9+
 
 			String publisherName = "java.util.concurrent.Flow.Publisher";

spring-core/src/main/java/org/springframework/core/env/ProfilesParser.java

@@ -22,6 +22,7 @@ import java.util.List;
 import java.util.StringTokenizer;
 import java.util.function.Predicate;
 
+import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 
@@ -31,10 +32,7 @@ import org.springframework.util.StringUtils;
  * @author Phillip Webb
  * @since 5.1
  */
-final class ProfilesParser {
+abstract class ProfilesParser {
-
-	private ProfilesParser() {
-	}
 
 	static Profiles parse(String... expressions) {
 		Assert.notEmpty(expressions, "Must specify at least one profile");
@@ -46,8 +44,7 @@ final class ProfilesParser {
 	}
 
 	private static Profiles parseExpression(String expression) {
-		Assert.hasText(expression, () ->
+		Assert.hasText(expression, () -> "Invalid profile expression [" + expression + "]: must contain text");
-				"Invalid profile expression [" + expression + "]: must contain text");
 		StringTokenizer tokens = new StringTokenizer(expression, "()&|!", true);
 		return parseTokens(expression, tokens);
 	}
@@ -88,8 +85,7 @@ final class ProfilesParser {
 		return merge(expression, elements, operator);
 	}
 
-	private static Profiles merge(String expression, List<Profiles> elements,
+	private static Profiles merge(String expression, List<Profiles> elements, @Nullable Operator operator) {
-			Operator operator) {
 		assertWellFormed(expression, !elements.isEmpty());
 		if (elements.size() == 1) {
 			return elements.get(0);
@@ -99,18 +95,15 @@ final class ProfilesParser {
 	}
 
 	private static void assertWellFormed(String expression, boolean wellFormed) {
-		Assert.isTrue(wellFormed,
+		Assert.isTrue(wellFormed, () -> "Malformed profile expression [" + expression + "]");
-				() -> "Malformed profile expression [" + expression + "]");
 	}
 
 	private static Profiles or(Profiles... profiles) {
-		return activeProfile -> Arrays.stream(profiles).anyMatch(
+		return activeProfile -> Arrays.stream(profiles).anyMatch(isMatch(activeProfile));
-				isMatch(activeProfile));
 	}
 
 	private static Profiles and(Profiles... profiles) {
-		return activeProfile -> Arrays.stream(profiles).allMatch(
+		return activeProfile -> Arrays.stream(profiles).allMatch(isMatch(activeProfile));
-				isMatch(activeProfile));
 	}
 
 	private static Profiles not(Profiles profiles) {
@@ -125,10 +118,9 @@ final class ProfilesParser {
 		return profiles -> profiles.matches(activeProfile);
 	}
 
-	private enum Operator {
+
-		AND,
+	private enum Operator {AND, OR}
-		OR
+
-	}
 
 	private static class ParsedProfiles implements Profiles {
 
@@ -155,7 +147,6 @@ final class ProfilesParser {
 		public String toString() {
 			return StringUtils.arrayToDelimitedString(this.expressions, " or ");
 		}
-
 	}
 
 }

spring-core/src/main/java/org/springframework/core/env/PropertySource.java

@@ -132,9 +132,9 @@ public abstract class PropertySource<T> {
 	 * <p>No properties other than {@code name} are evaluated.
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (this == obj || (obj instanceof PropertySource &&
+		return (this == other || (other instanceof PropertySource &&
-				ObjectUtils.nullSafeEquals(this.name, ((PropertySource<?>) obj).name)));
+				ObjectUtils.nullSafeEquals(this.name, ((PropertySource<?>) other).name)));
 	}
 
 	/**

spring-core/src/main/java/org/springframework/core/io/AbstractResource.java

@@ -209,23 +209,14 @@ public abstract class AbstractResource implements Resource {
 	}
 
 
-	/**
-	 * This implementation returns the description of this resource.
-	 * @see #getDescription()
-	 */
-	@Override
-	public String toString() {
-		return getDescription();
-	}
-
 	/**
 	 * This implementation compares description strings.
 	 * @see #getDescription()
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj == this ||
+		return (this == other || (other instanceof Resource &&
-			(obj instanceof Resource && ((Resource) obj).getDescription().equals(getDescription())));
+				((Resource) other).getDescription().equals(getDescription())));
 	}
 
 	/**
@@ -237,4 +228,13 @@ public abstract class AbstractResource implements Resource {
 		return getDescription().hashCode();
 	}
 
+	/**
+	 * This implementation returns the description of this resource.
+	 * @see #getDescription()
+	 */
+	@Override
+	public String toString() {
+		return getDescription();
+	}
+
 }

spring-core/src/main/java/org/springframework/core/io/ByteArrayResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -115,9 +115,9 @@ public class ByteArrayResource extends AbstractResource {
 	 * @see java.util.Arrays#equals(byte[], byte[])
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj == this ||
+		return (this == other || (other instanceof ByteArrayResource &&
-			(obj instanceof ByteArrayResource && Arrays.equals(((ByteArrayResource) obj).byteArray, this.byteArray)));
+				Arrays.equals(((ByteArrayResource) other).byteArray, this.byteArray)));
 	}
 
 	/**

spring-core/src/main/java/org/springframework/core/io/ClassPathResource.java

@@ -244,18 +244,18 @@ public class ClassPathResource extends AbstractFileResolvingResource {
 	 * This implementation compares the underlying class path locations.
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (obj == this) {
+		if (this == other) {
 			return true;
 		}
-		if (obj instanceof ClassPathResource) {
+		if (!(other instanceof ClassPathResource)) {
-			ClassPathResource otherRes = (ClassPathResource) obj;
+			return false;
+		}
+		ClassPathResource otherRes = (ClassPathResource) other;
 		return (this.path.equals(otherRes.path) &&
 				ObjectUtils.nullSafeEquals(this.classLoader, otherRes.classLoader) &&
 				ObjectUtils.nullSafeEquals(this.clazz, otherRes.clazz));
 	}
-		return false;
-	}
 
 	/**
 	 * This implementation returns the hash code of the underlying

spring-core/src/main/java/org/springframework/core/io/DescriptiveResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -72,9 +72,9 @@ public class DescriptiveResource extends AbstractResource {
 	 * This implementation compares the underlying description String.
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj == this ||
+		return (this == other || (other instanceof DescriptiveResource &&
-			(obj instanceof DescriptiveResource && ((DescriptiveResource) obj).description.equals(this.description)));
+				((DescriptiveResource) other).description.equals(this.description)));
 	}
 
 	/**

spring-core/src/main/java/org/springframework/core/io/FileSystemResource.java

@@ -282,9 +282,9 @@ public class FileSystemResource extends AbstractResource implements WritableReso
 	 * This implementation compares the underlying File references.
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj == this ||
+		return (this == other || (other instanceof FileSystemResource &&
-			(obj instanceof FileSystemResource && this.path.equals(((FileSystemResource) obj).path)));
+				this.path.equals(((FileSystemResource) other).path)));
 	}
 
 	/**

spring-core/src/main/java/org/springframework/core/io/InputStreamResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -115,9 +115,9 @@ public class InputStreamResource extends AbstractResource {
 	 * This implementation compares the underlying InputStream.
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj == this ||
+		return (this == other || (other instanceof InputStreamResource &&
-			(obj instanceof InputStreamResource && ((InputStreamResource) obj).inputStream.equals(this.inputStream)));
+				((InputStreamResource) other).inputStream.equals(this.inputStream)));
 	}
 
 	/**

spring-core/src/main/java/org/springframework/core/io/PathResource.java

@@ -274,9 +274,9 @@ public class PathResource extends AbstractResource implements WritableResource {
 	 * This implementation compares the underlying Path references.
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (this == obj ||
+		return (this == other || (other instanceof PathResource &&
-			(obj instanceof PathResource && this.path.equals(((PathResource) obj).path)));
+				this.path.equals(((PathResource) other).path)));
 	}
 
 	/**

spring-core/src/main/java/org/springframework/core/io/UrlResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -261,9 +261,9 @@ public class UrlResource extends AbstractFileResolvingResource {
 	 * This implementation compares the underlying URL references.
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj == this ||
+		return (this == other || (other instanceof UrlResource &&
-			(obj instanceof UrlResource && this.cleanedUrl.equals(((UrlResource) obj).cleanedUrl)));
+				this.cleanedUrl.equals(((UrlResource) other).cleanedUrl)));
 	}
 
 	/**

spring-core/src/main/java/org/springframework/core/io/VfsResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -125,8 +125,9 @@ public class VfsResource extends AbstractResource {
 	}
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj == this || (obj instanceof VfsResource && this.resource.equals(((VfsResource) obj).resource)));
+		return (this == other || (other instanceof VfsResource &&
+				this.resource.equals(((VfsResource) other).resource)));
 	}
 
 	@Override

spring-core/src/main/java/org/springframework/core/io/buffer/DataBuffer.java

@@ -57,22 +57,22 @@ public interface DataBuffer {
 	DataBufferFactory factory();
 
 	/**
-	 * Return the index of the first byte in this buffer that matches the given
+	 * Return the index of the first byte in this buffer that matches
-	 * predicate.
+	 * the given predicate.
 	 * @param predicate the predicate to match
 	 * @param fromIndex the index to start the search from
-	 * @return the index of the first byte that matches {@code predicate}; or {@code -1}
+	 * @return the index of the first byte that matches {@code predicate};
-	 * if none match
+	 * or {@code -1} if none match
 	 */
 	int indexOf(IntPredicate predicate, int fromIndex);
 
 	/**
-	 * Return the index of the last byte in this buffer that matches the given
+	 * Return the index of the last byte in this buffer that matches
-	 * predicate.
+	 * the given predicate.
 	 * @param predicate the predicate to match
 	 * @param fromIndex the index to start the search from
-	 * @return the index of the last byte that matches {@code predicate}; or {@code -1}
+	 * @return the index of the last byte that matches {@code predicate};
-	 * if none match
+	 * or {@code -1} if none match
 	 */
 	int lastIndexOf(IntPredicate predicate, int fromIndex);
 
@@ -97,9 +97,10 @@ public interface DataBuffer {
 	int capacity();
 
 	/**
-	 * Sets the number of bytes that this buffer can contain. If the new capacity is lower than
+	 * Set the number of bytes that this buffer can contain.
-	 * the current capacity, the contents of this buffer will be truncated. If the new capacity
+	 * <p>If the new capacity is lower than the current capacity, the contents
-	 * is higher than the current capacity, it will be expanded.
+	 * of this buffer will be truncated. If the new capacity is higher than
+	 * the current capacity, it will be expanded.
 	 * @param capacity the new capacity
 	 * @return this buffer
 	 */
@@ -116,8 +117,8 @@ public interface DataBuffer {
 	 * Set the position from which this buffer will read.
 	 * @param readPosition the new read position
 	 * @return this buffer
-	 * @throws IndexOutOfBoundsException if {@code readPosition} is smaller than 0 or greater than
+	 * @throws IndexOutOfBoundsException if {@code readPosition} is smaller than 0
-	 * {@link #writePosition()}
+	 * or greater than {@link #writePosition()}
 	 * @since 5.0.1
 	 */
 	DataBuffer readPosition(int readPosition);

spring-core/src/main/java/org/springframework/core/io/buffer/DefaultDataBuffer.java

@@ -27,14 +27,13 @@ import java.util.function.IntPredicate;
 import org.springframework.util.Assert;
 import org.springframework.util.ObjectUtils;
 
-
 /**
  * Default implementation of the {@link DataBuffer} interface that uses a
  * {@link ByteBuffer} internally. with separate read and write positions.
  * Constructed using the {@link DefaultDataBufferFactory}.
  *
- * <p>Inspired by Netty's {@code ByteBuf}. Introduced so that non-Netty runtimes (i.e. Servlet)
+ * <p>Inspired by Netty's {@code ByteBuf}. Introduced so that non-Netty runtimes
- * do not require Netty on the classpath.
+ * (i.e. Servlet) do not require Netty on the classpath.
  *
  * @author Arjen Poutsma
  * @author Juergen Hoeller
@@ -52,32 +51,29 @@ public class DefaultDataBuffer implements DataBuffer {
 
 	private ByteBuffer byteBuffer;
 
+	private int capacity;
+
 	private int readPosition;
 
 	private int writePosition;
 
-	private int capacity;
 
 	private DefaultDataBuffer(DefaultDataBufferFactory dataBufferFactory, ByteBuffer byteBuffer) {
-		Assert.notNull(dataBufferFactory, "'dataBufferFactory' must not be null");
+		Assert.notNull(dataBufferFactory, "DefaultDataBufferFactory must not be null");
-		Assert.notNull(byteBuffer, "'byteBuffer' must not be null");
+		Assert.notNull(byteBuffer, "ByteBuffer must not be null");
-
 		this.dataBufferFactory = dataBufferFactory;
 		ByteBuffer slice = byteBuffer.slice();
 		this.byteBuffer = slice;
 		this.capacity = slice.remaining();
 	}
 
-	static DefaultDataBuffer fromFilledByteBuffer(DefaultDataBufferFactory dataBufferFactory,
+	static DefaultDataBuffer fromFilledByteBuffer(DefaultDataBufferFactory dataBufferFactory, ByteBuffer byteBuffer) {
-			ByteBuffer byteBuffer) {
-
 		DefaultDataBuffer dataBuffer = new DefaultDataBuffer(dataBufferFactory, byteBuffer);
 		dataBuffer.writePosition(byteBuffer.remaining());
 		return dataBuffer;
 	}
 
-	static DefaultDataBuffer fromEmptyByteBuffer(DefaultDataBufferFactory dataBufferFactory,
+	static DefaultDataBuffer fromEmptyByteBuffer(DefaultDataBufferFactory dataBufferFactory, ByteBuffer byteBuffer) {
-			ByteBuffer byteBuffer) {
 		return new DefaultDataBuffer(dataBufferFactory, byteBuffer);
 	}
 
@@ -95,6 +91,7 @@ public class DefaultDataBuffer implements DataBuffer {
 		this.capacity = byteBuffer.remaining();
 	}
 
+
 	@Override
 	public DefaultDataBufferFactory factory() {
 		return this.dataBufferFactory;
@@ -414,17 +411,17 @@ public class DefaultDataBuffer implements DataBuffer {
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (!(obj instanceof DefaultDataBuffer)) {
+		if (!(other instanceof DefaultDataBuffer)) {
 			return false;
 		}
-		DefaultDataBuffer other = (DefaultDataBuffer) obj;
+		DefaultDataBuffer otherBuffer = (DefaultDataBuffer) other;
-		return (this.readPosition == other.readPosition &&
+		return (this.readPosition == otherBuffer.readPosition &&
-				this.writePosition == other.writePosition &&
+				this.writePosition == otherBuffer.writePosition &&
-				this.byteBuffer.equals(other.byteBuffer));
+				this.byteBuffer.equals(otherBuffer.byteBuffer));
 	}
 
 	@Override
@@ -434,10 +431,11 @@ public class DefaultDataBuffer implements DataBuffer {
 
 	@Override
 	public String toString() {
-		return String.format("DefaultDataBuffer (r: %d, w %d, c %d)", this.readPosition,
+		return String.format("DefaultDataBuffer (r: %d, w %d, c %d)",
-				this.writePosition, this.capacity);
+				this.readPosition, this.writePosition, this.capacity);
 	}
 
+
 	private void checkIndex(int index, int length) {
 		assertIndex(index >= 0, "index %d must be >= 0", index);
 		assertIndex(length >= 0, "length %d must be >= 0", index);
@@ -452,6 +450,7 @@ public class DefaultDataBuffer implements DataBuffer {
 		}
 	}
 
+
 	private class DefaultDataBufferInputStream extends InputStream {
 
 		@Override
@@ -479,7 +478,6 @@ public class DefaultDataBuffer implements DataBuffer {
 	}
 
 
-
 	private class DefaultDataBufferOutputStream extends OutputStream {
 
 		@Override
@@ -496,16 +494,14 @@ public class DefaultDataBuffer implements DataBuffer {
 
 	private static class SlicedDefaultDataBuffer extends DefaultDataBuffer {
 
-		SlicedDefaultDataBuffer(ByteBuffer byteBuffer, DefaultDataBufferFactory dataBufferFactory,
+		SlicedDefaultDataBuffer(ByteBuffer byteBuffer, DefaultDataBufferFactory dataBufferFactory, int length) {
-				int length) {
 			super(dataBufferFactory, byteBuffer);
 			writePosition(length);
 		}
 
 		@Override
 		public DefaultDataBuffer capacity(int newCapacity) {
-			throw new UnsupportedOperationException(
+			throw new UnsupportedOperationException("Changing the capacity of a sliced buffer is not supported");
-					"Changing the capacity of a sliced buffer is not supported");
 		}
 	}
 

spring-core/src/main/java/org/springframework/core/io/buffer/NettyDataBuffer.java

@@ -37,19 +37,18 @@ import org.springframework.util.Assert;
  */
 public class NettyDataBuffer implements PooledDataBuffer {
 
-	private final NettyDataBufferFactory dataBufferFactory;
-
 	private final ByteBuf byteBuf;
 
+	private final NettyDataBufferFactory dataBufferFactory;
+
 
 	/**
 	 * Creates a new {@code NettyDataBuffer} based on the given {@code ByteBuff}.
 	 * @param byteBuf the buffer to base this buffer on
 	 */
 	NettyDataBuffer(ByteBuf byteBuf, NettyDataBufferFactory dataBufferFactory) {
-		Assert.notNull(byteBuf, "'byteBuf' must not be null");
+		Assert.notNull(byteBuf, "ByteBuf must not be null");
-		Assert.notNull(dataBufferFactory, "'dataBufferFactory' must not be null");
+		Assert.notNull(dataBufferFactory, "NettyDataBufferFactory must not be null");
-
 		this.byteBuf = byteBuf;
 		this.dataBufferFactory = dataBufferFactory;
 	}
@@ -272,15 +271,9 @@ public class NettyDataBuffer implements PooledDataBuffer {
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		return  (this == other || (other instanceof NettyDataBuffer &&
-			return true;
+				this.byteBuf.equals(((NettyDataBuffer) other).byteBuf)));
-		}
-		if (!(obj instanceof NettyDataBuffer)) {
-			return false;
-		}
-		NettyDataBuffer other = (NettyDataBuffer) obj;
-		return this.byteBuf.equals(other.byteBuf);
 	}
 
 	@Override

spring-core/src/main/java/org/springframework/util/ConcurrentReferenceHashMap.java

@@ -839,12 +839,12 @@ public class ConcurrentReferenceHashMap<K, V> extends AbstractMap<K, V> implemen
 
 		@Override
 		public boolean contains(@Nullable Object o) {
-			if (o != null && o instanceof Map.Entry<?, ?>) {
+			if (o instanceof Map.Entry<?, ?>) {
 				Map.Entry<?, ?> entry = (java.util.Map.Entry<?, ?>) o;
 				Reference<K, V> reference = ConcurrentReferenceHashMap.this.getReference(entry.getKey(), Restructure.NEVER);
-				Entry<K, V> other = (reference != null ? reference.get() : null);
+				Entry<K, V> otherEntry = (reference != null ? reference.get() : null);
-				if (other != null) {
+				if (otherEntry != null) {
-					return ObjectUtils.nullSafeEquals(entry.getValue(), other.getValue());
+					return ObjectUtils.nullSafeEquals(otherEntry.getValue(), otherEntry.getValue());
 				}
 			}
 			return false;

spring-core/src/main/java/org/springframework/util/comparator/BooleanComparator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -67,9 +67,9 @@ public class BooleanComparator implements Comparator<Boolean>, Serializable {
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (this == obj ||
+		return (this == other || (other instanceof BooleanComparator &&
-				(obj instanceof BooleanComparator && (this.trueLow == ((BooleanComparator) obj).trueLow)));
+				this.trueLow == ((BooleanComparator) other).trueLow));
 	}
 
 	@Override

spring-core/src/main/java/org/springframework/util/comparator/CompoundComparator.java

@@ -187,15 +187,9 @@ public class CompoundComparator<T> implements Comparator<T>, Serializable {
 
 	@Override
 	@SuppressWarnings("unchecked")
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		return (this == other || (other instanceof CompoundComparator &&
-			return true;
+				this.comparators.equals(((CompoundComparator<T>) other).comparators)));
-		}
-		if (!(obj instanceof CompoundComparator)) {
-			return false;
-		}
-		CompoundComparator<T> other = (CompoundComparator<T>) obj;
-		return this.comparators.equals(other.comparators);
 	}
 
 	@Override

spring-core/src/main/java/org/springframework/util/comparator/InvertibleComparator.java

@@ -108,15 +108,15 @@ public class InvertibleComparator<T> implements Comparator<T>, Serializable {
 
 	@Override
 	@SuppressWarnings("unchecked")
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (!(obj instanceof InvertibleComparator)) {
+		if (!(other instanceof InvertibleComparator)) {
 			return false;
 		}
-		InvertibleComparator<T> other = (InvertibleComparator<T>) obj;
+		InvertibleComparator<T> otherComp = (InvertibleComparator<T>) other;
-		return (this.comparator.equals(other.comparator) && this.ascending == other.ascending);
+		return (this.comparator.equals(otherComp.comparator) && this.ascending == otherComp.ascending);
 	}
 
 	@Override

spring-core/src/main/java/org/springframework/util/comparator/NullSafeComparator.java

@@ -108,15 +108,15 @@ public class NullSafeComparator<T> implements Comparator<T> {
 
 	@Override
 	@SuppressWarnings("unchecked")
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (!(obj instanceof NullSafeComparator)) {
+		if (!(other instanceof NullSafeComparator)) {
 			return false;
 		}
-		NullSafeComparator<T> other = (NullSafeComparator<T>) obj;
+		NullSafeComparator<T> otherComp = (NullSafeComparator<T>) other;
-		return (this.nonNullComparator.equals(other.nonNullComparator) && this.nullsLow == other.nullsLow);
+		return (this.nonNullComparator.equals(otherComp.nonNullComparator) && this.nullsLow == otherComp.nullsLow);
 	}
 
 	@Override

spring-core/src/test/java/org/springframework/core/env/DummyEnvironment.java

@@ -73,6 +73,7 @@ public class DummyEnvironment implements Environment {
 		return null;
 	}
 
+	@Deprecated
 	@Override
 	public boolean acceptsProfiles(String... profiles) {
 		return false;

spring-jms/src/main/java/org/springframework/jms/support/converter/MessagingMessageConverter.java

@@ -117,9 +117,9 @@ public class MessagingMessageConverter implements MessageConverter, Initializing
 	public Object fromMessage(javax.jms.Message message) throws JMSException, MessageConversionException {
 		Map<String, Object> mappedHeaders = extractHeaders(message);
 		Object convertedObject = extractPayload(message);
-		MessageBuilder<Object> builder = (convertedObject instanceof org.springframework.messaging.Message) ?
+		MessageBuilder<Object> builder = (convertedObject instanceof org.springframework.messaging.Message ?
 				MessageBuilder.fromMessage((org.springframework.messaging.Message<Object>) convertedObject) :
-				MessageBuilder.withPayload(convertedObject);
+				MessageBuilder.withPayload(convertedObject));
 		return builder.copyHeadersIfAbsent(mappedHeaders).build();
 	}
 

spring-messaging/src/main/java/org/springframework/messaging/handler/AbstractMessageCondition.java

@@ -31,34 +31,18 @@ import org.springframework.lang.Nullable;
  * @since 4.0
  * @param <T> the kind of condition that this condition can be combined with or compared to
  */
-public abstract class AbstractMessageCondition<T extends AbstractMessageCondition<T>>
+public abstract class AbstractMessageCondition<T extends AbstractMessageCondition<T>> implements MessageCondition<T> {
-		implements MessageCondition<T> {
-
-
-	/**
-	 * Return the collection of objects the message condition is composed of
-	 * (e.g. destination patterns), never {@code null}.
-	 */
-	protected abstract Collection<?> getContent();
-
-	/**
-	 * The notation to use when printing discrete items of content.
-	 * For example " || " for URL patterns or " && " for param expressions.
-	 */
-	protected abstract String getToStringInfix();
-
 
 	@Override
-	public boolean equals(@Nullable Object obj) {
+	public boolean equals(@Nullable Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (obj != null && getClass() == obj.getClass()) {
+		if (other == null || getClass() != other.getClass()) {
-			AbstractMessageCondition<?> other = (AbstractMessageCondition<?>) obj;
-			return getContent().equals(other.getContent());
-		}
 			return false;
 		}
+		return getContent().equals(((AbstractMessageCondition<?>) other).getContent());
+	}
 
 	@Override
 	public int hashCode() {
@@ -79,4 +63,17 @@ public abstract class AbstractMessageCondition<T extends AbstractMessageConditio
 		return builder.toString();
 	}
 
+
+	/**
+	 * Return the collection of objects the message condition is composed of
+	 * (e.g. destination patterns), never {@code null}.
+	 */
+	protected abstract Collection<?> getContent();
+
+	/**
+	 * The notation to use when printing discrete items of content.
+	 * For example " || " for URL patterns or " && " for param expressions.
+	 */
+	protected abstract String getToStringInfix();
+
 }

spring-messaging/src/main/java/org/springframework/messaging/simp/SimpMessageMappingInfo.java

@@ -94,17 +94,17 @@ public class SimpMessageMappingInfo implements MessageCondition<SimpMessageMappi
 
 
 	@Override
-	public boolean equals(@Nullable Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (obj != null && obj instanceof SimpMessageMappingInfo) {
+		if (!(other instanceof SimpMessageMappingInfo)) {
-			SimpMessageMappingInfo other = (SimpMessageMappingInfo) obj;
-			return (this.destinationConditions.equals(other.destinationConditions) &&
-					this.messageTypeMessageCondition.equals(other.messageTypeMessageCondition));
-		}
 			return false;
 		}
+		SimpMessageMappingInfo otherInfo = (SimpMessageMappingInfo) other;
+		return (this.destinationConditions.equals(otherInfo.destinationConditions) &&
+				this.messageTypeMessageCondition.equals(otherInfo.messageTypeMessageCondition));
+	}
 
 	@Override
 	public int hashCode() {

spring-orm/src/main/java/org/springframework/orm/hibernate5/SpringFlushSynchronization.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,9 +44,9 @@ public class SpringFlushSynchronization extends TransactionSynchronizationAdapte
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj instanceof SpringFlushSynchronization &&
+		return (this == other || (other instanceof SpringFlushSynchronization &&
-				this.session == ((SpringFlushSynchronization) obj).session);
+				this.session == ((SpringFlushSynchronization) other).session));
 	}
 
 	@Override

spring-tx/src/main/java/org/springframework/jca/context/SpringContextResourceAdapter.java

@@ -246,10 +246,10 @@ public class SpringContextResourceAdapter implements ResourceAdapter {
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj instanceof SpringContextResourceAdapter &&
+		return (this == other || (other instanceof SpringContextResourceAdapter &&
 				ObjectUtils.nullSafeEquals(getContextConfigLocation(),
-						((SpringContextResourceAdapter) obj).getContextConfigLocation()));
+						((SpringContextResourceAdapter) other).getContextConfigLocation())));
 	}
 
 	@Override

spring-tx/src/main/java/org/springframework/transaction/support/DelegatingTransactionDefinition.java

@@ -75,8 +75,8 @@ public abstract class DelegatingTransactionDefinition implements TransactionDefi
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return this.targetDefinition.equals(obj);
+		return this.targetDefinition.equals(other);
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/client/MultipartBodyBuilder.java

@@ -101,9 +101,9 @@ public final class MultipartBodyBuilder {
 		HttpHeaders partHeaders = new HttpHeaders();
 
 		if (part instanceof HttpEntity) {
-			HttpEntity<?> other = (HttpEntity<?>) part;
+			HttpEntity<?> httpEntity = (HttpEntity<?>) part;
-			partBody = other.getBody();
+			partBody = httpEntity.getBody();
-			partHeaders.addAll(other.getHeaders());
+			partHeaders.addAll(httpEntity.getHeaders());
 		}
 		else {
 			partBody = part;

spring-web/src/main/java/org/springframework/http/codec/ResourceHttpMessageWriter.java

@@ -18,6 +18,7 @@ package org.springframework.http.codec;
 
 import java.io.File;
 import java.io.IOException;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -50,8 +51,6 @@ import org.springframework.http.server.reactive.ServerHttpResponse;
 import org.springframework.lang.Nullable;
 import org.springframework.util.MimeTypeUtils;
 
-import static java.util.Collections.emptyMap;
-
 /**
  * {@code HttpMessageWriter} that can write a {@link Resource}.
  *
@@ -244,7 +243,7 @@ public class ResourceHttpMessageWriter implements HttpMessageWriter<Resource> {
 				.orElseGet(() -> {
 					Publisher<? extends ResourceRegion> input = Mono.just(region);
 					MediaType mediaType = message.getHeaders().getContentType();
-					return encodeAndWriteRegions(input, mediaType, message, emptyMap());
+					return encodeAndWriteRegions(input, mediaType, message, Collections.emptyMap());
 				});
 	}
 

spring-web/src/main/java/org/springframework/http/server/DefaultRequestPath.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -132,10 +132,10 @@ class DefaultRequestPath implements RequestPath {
 		if (other == null || getClass() != other.getClass()) {
 			return false;
 		}
-		DefaultRequestPath that = (DefaultRequestPath) other;
+		DefaultRequestPath otherPath= (DefaultRequestPath) other;
-		return (this.fullPath.equals(that.fullPath) &&
+		return (this.fullPath.equals(otherPath.fullPath) &&
-				this.contextPath.equals(that.contextPath) &&
+				this.contextPath.equals(otherPath.contextPath) &&
-				this.pathWithinApplication.equals(that.pathWithinApplication));
+				this.pathWithinApplication.equals(otherPath.pathWithinApplication));
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/web/context/support/ServletContextResource.java

@@ -236,16 +236,16 @@ public class ServletContextResource extends AbstractFileResolvingResource implem
 	 * This implementation compares the underlying ServletContext resource locations.
 	 */
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (obj == this) {
+		if (this == other) {
 			return true;
 		}
-		if (obj instanceof ServletContextResource) {
+		if (!(other instanceof ServletContextResource)) {
-			ServletContextResource otherRes = (ServletContextResource) obj;
-			return (this.servletContext.equals(otherRes.servletContext) && this.path.equals(otherRes.path));
-		}
 			return false;
 		}
+		ServletContextResource otherRes = (ServletContextResource) other;
+		return (this.servletContext.equals(otherRes.servletContext) && this.path.equals(otherRes.path));
+	}
 
 	/**
 	 * This implementation returns the hash code of the underlying

spring-web/src/main/java/org/springframework/web/multipart/MultipartFileResource.java

@@ -86,9 +86,9 @@ class MultipartFileResource extends AbstractResource {
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		return (obj == this || (obj instanceof MultipartFileResource &&
+		return (this == other || (other instanceof MultipartFileResource &&
-				((MultipartFileResource) obj).multipartFile.equals(this.multipartFile)));
+				((MultipartFileResource) other).multipartFile.equals(this.multipartFile)));
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/web/util/HierarchicalUriComponents.java

@@ -53,6 +53,7 @@ final class HierarchicalUriComponents extends UriComponents {
 
 	private static final String PATH_DELIMITER_STRING = "/";
 
+
 	/**
 	 * Represents an empty path.
 	 */
@@ -87,8 +88,8 @@ final class HierarchicalUriComponents extends UriComponents {
 		}
 
 		@Override
-		public boolean equals(Object obj) {
+		public boolean equals(Object other) {
-			return (this == obj);
+			return (this == other);
 		}
 
 		@Override
@@ -506,21 +507,21 @@ final class HierarchicalUriComponents extends UriComponents {
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (!(obj instanceof HierarchicalUriComponents)) {
+		if (!(other instanceof HierarchicalUriComponents)) {
 			return false;
 		}
-		HierarchicalUriComponents other = (HierarchicalUriComponents) obj;
+		HierarchicalUriComponents otherComp = (HierarchicalUriComponents) other;
-		return ObjectUtils.nullSafeEquals(getScheme(), other.getScheme()) &&
+		return (ObjectUtils.nullSafeEquals(getScheme(), otherComp.getScheme()) &&
-				ObjectUtils.nullSafeEquals(getUserInfo(), other.getUserInfo()) &&
+				ObjectUtils.nullSafeEquals(getUserInfo(), otherComp.getUserInfo()) &&
-				ObjectUtils.nullSafeEquals(getHost(), other.getHost()) &&
+				ObjectUtils.nullSafeEquals(getHost(), otherComp.getHost()) &&
-				getPort() == other.getPort() &&
+				getPort() == otherComp.getPort() &&
-				this.path.equals(other.path) &&
+				this.path.equals(otherComp.path) &&
-				this.queryParams.equals(other.queryParams) &&
+				this.queryParams.equals(otherComp.queryParams) &&
-				ObjectUtils.nullSafeEquals(getFragment(), other.getFragment());
+				ObjectUtils.nullSafeEquals(getFragment(), otherComp.getFragment()));
 	}
 
 	@Override
@@ -752,9 +753,9 @@ final class HierarchicalUriComponents extends UriComponents {
 		}
 
 		@Override
-		public boolean equals(Object obj) {
+		public boolean equals(Object other) {
-			return (this == obj || (obj instanceof FullPathComponent &&
+			return (this == other || (other instanceof FullPathComponent &&
-					getPath().equals(((FullPathComponent) obj).getPath())));
+					getPath().equals(((FullPathComponent) other).getPath())));
 		}
 
 		@Override
@@ -830,9 +831,9 @@ final class HierarchicalUriComponents extends UriComponents {
 		}
 
 		@Override
-		public boolean equals(Object obj) {
+		public boolean equals(Object other) {
-			return (this == obj || (obj instanceof PathSegmentComponent &&
+			return (this == other || (other instanceof PathSegmentComponent &&
-					getPathSegments().equals(((PathSegmentComponent) obj).getPathSegments())));
+					getPathSegments().equals(((PathSegmentComponent) other).getPathSegments())));
 		}
 
 		@Override

spring-web/src/main/java/org/springframework/web/util/OpaqueUriComponents.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -157,19 +157,17 @@ final class OpaqueUriComponents extends UriComponents {
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (!(obj instanceof OpaqueUriComponents)) {
+		if (!(other instanceof OpaqueUriComponents)) {
 			return false;
 		}
-
+		OpaqueUriComponents otherComp = (OpaqueUriComponents) other;
-		OpaqueUriComponents other = (OpaqueUriComponents) obj;
+		return (ObjectUtils.nullSafeEquals(getScheme(), otherComp.getScheme()) &&
-		return ObjectUtils.nullSafeEquals(getScheme(), other.getScheme()) &&
+				ObjectUtils.nullSafeEquals(this.ssp, otherComp.ssp) &&
-				ObjectUtils.nullSafeEquals(this.ssp, other.ssp) &&
+				ObjectUtils.nullSafeEquals(getFragment(), otherComp.getFragment()));
-				ObjectUtils.nullSafeEquals(getFragment(), other.getFragment());
-
 	}
 
 	@Override

spring-web/src/test/java/org/springframework/web/method/ResolvableMethod.java

@@ -209,17 +209,17 @@ public class ResolvableMethod {
 	}
 
 	private String formatMethod() {
-		return this.method().getName() +
+		return (this.method().getName() +
 				Arrays.stream(this.method.getParameters())
 						.map(this::formatParameter)
-						.collect(joining(",\n\t", "(\n\t", "\n)"));
+						.collect(joining(",\n\t", "(\n\t", "\n)")));
 	}
 
 	private String formatParameter(Parameter param) {
-		Annotation[] annot = param.getAnnotations();
+		Annotation[] anns = param.getAnnotations();
-		return annot.length > 0 ?
+		return (anns.length > 0 ?
-				Arrays.stream(annot).map(this::formatAnnotation).collect(joining(",", "[", "]")) + " " + param :
+				Arrays.stream(anns).map(this::formatAnnotation).collect(joining(",", "[", "]")) + " " + param :
-				param.toString();
+				param.toString());
 	}
 
 	private String formatAnnotation(Annotation annotation) {
@@ -536,9 +536,9 @@ public class ResolvableMethod {
 		@SafeVarargs
 		public final ArgResolver annotNotPresent(Class<? extends Annotation>... annotationTypes) {
 			this.filters.add(param ->
-					(annotationTypes.length != 0) ?
+					(annotationTypes.length > 0 ?
 							Arrays.stream(annotationTypes).noneMatch(param::hasParameterAnnotation) :
-							param.getParameterAnnotations().length == 0);
+							param.getParameterAnnotations().length == 0));
 			return this;
 		}
 

spring-webflux/src/main/java/org/springframework/web/reactive/accept/HeaderContentTypeResolver.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.web.reactive.accept;
 
 import java.util.List;
@@ -36,7 +37,7 @@ public class HeaderContentTypeResolver implements RequestedContentTypeResolver {
 		try {
 			List<MediaType> mediaTypes = exchange.getRequest().getHeaders().getAccept();
 			MediaType.sortBySpecificityAndQuality(mediaTypes);
-			return !CollectionUtils.isEmpty(mediaTypes) ? mediaTypes : MEDIA_TYPE_ALL_LIST;
+			return (!CollectionUtils.isEmpty(mediaTypes) ? mediaTypes : MEDIA_TYPE_ALL_LIST);
 		}
 		catch (InvalidMediaTypeException ex) {
 			String value = exchange.getRequest().getHeaders().getFirst("Accept");

spring-webflux/src/main/java/org/springframework/web/reactive/accept/RequestedContentTypeResolverBuilder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -87,11 +87,9 @@ public class RequestedContentTypeResolverBuilder {
 	 * of resolvers configured through this builder.
 	 */
 	public RequestedContentTypeResolver build() {
-
+		List<RequestedContentTypeResolver> resolvers = (!this.candidates.isEmpty() ?
-		List<RequestedContentTypeResolver> resolvers =
+				this.candidates.stream().map(Supplier::get).collect(Collectors.toList()) :
-				this.candidates.isEmpty() ?
+				Collections.singletonList(new HeaderContentTypeResolver()));
-						Collections.singletonList(new HeaderContentTypeResolver()) :
-						this.candidates.stream().map(Supplier::get).collect(Collectors.toList());
 
 		return exchange -> {
 			for (RequestedContentTypeResolver resolver : resolvers) {

spring-webflux/src/main/java/org/springframework/web/reactive/config/PathMatchConfigurer.java

@@ -74,7 +74,9 @@ public class PathMatchConfigurer {
 	 * @since 5.1
 	 */
 	public PathMatchConfigurer addPathPrefix(String prefix, Predicate<Class<?>> predicate) {
-		this.pathPrefixes = this.pathPrefixes == null ? new LinkedHashMap<>() : this.pathPrefixes;
+		if (this.pathPrefixes == null) {
+			this.pathPrefixes = new LinkedHashMap<>();
+		}
 		this.pathPrefixes.put(prefix, predicate);
 		return this;
 	}

spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClient.java

@@ -163,7 +163,6 @@ class DefaultWebClient implements WebClient {
 
 		private final Map<String, Object> attributes = new LinkedHashMap<>(4);
 
-
 		DefaultRequestBodyUriSpec(HttpMethod httpMethod) {
 			this.httpMethod = httpMethod;
 		}
@@ -318,7 +317,7 @@ class DefaultWebClient implements WebClient {
 		}
 
 		private ClientRequest.Builder initRequestBuilder() {
-			URI uri = this.uri != null ? this.uri : uriBuilderFactory.expand("");
+			URI uri = (this.uri != null ? this.uri : uriBuilderFactory.expand(""));
 			return ClientRequest.create(this.httpMethod, uri)
 					.headers(headers -> headers.addAll(initHeaders()))
 					.cookies(cookies -> cookies.addAll(initCookies()))

spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClientBuilder.java

@@ -228,9 +228,8 @@ final class DefaultWebClientBuilder implements WebClient.Builder {
 		if (this.uriBuilderFactory != null) {
 			return this.uriBuilderFactory;
 		}
-		DefaultUriBuilderFactory factory = this.baseUrl != null ?
+		DefaultUriBuilderFactory factory = (this.baseUrl != null ?
-				new DefaultUriBuilderFactory(this.baseUrl) : new DefaultUriBuilderFactory();
+				new DefaultUriBuilderFactory(this.baseUrl) : new DefaultUriBuilderFactory());
-
 		factory.setDefaultUriVariables(this.defaultUriVariables);
 		return factory;
 	}

spring-webflux/src/main/java/org/springframework/web/reactive/function/client/ExchangeFilterFunctions.java

@@ -92,10 +92,8 @@ public abstract class ExchangeFilterFunctions {
 	}
 
 	private static void checkIllegalCharacters(String username, String password) {
-
 		// Basic authentication only supports ISO 8859-1, see
 		// https://stackoverflow.com/questions/702629/utf-8-characters-mangled-in-http-basic-auth-username#703341
-
 		CharsetEncoder encoder = StandardCharsets.ISO_8859_1.newEncoder();
 		if (!encoder.canEncode(username) || !encoder.canEncode(password)) {
 			throw new IllegalArgumentException(
@@ -113,7 +111,6 @@ public abstract class ExchangeFilterFunctions {
 		}).build();
 	}
 
-
 	/**
 	 * Return a filter that generates an error signal when the given
 	 * {@link HttpStatus} predicate matches.
@@ -128,10 +125,8 @@ public abstract class ExchangeFilterFunctions {
 		Assert.notNull(exceptionFunction, "Function must not be null");
 
 		return ExchangeFilterFunction.ofResponseProcessor(
-				response -> statusPredicate.test(response.statusCode()) ?
+				response -> (statusPredicate.test(response.statusCode()) ?
-						Mono.error(exceptionFunction.apply(response)) :
+						Mono.error(exceptionFunction.apply(response)) : Mono.just(response)));
-						Mono.just(response)
-		);
 	}
 
 
@@ -146,7 +141,6 @@ public abstract class ExchangeFilterFunctions {
 
 		private final String password;
 
-
 		/**
 		 * Create a new {@code Credentials} instance with the given username and password.
 		 * @param username the username
@@ -159,7 +153,6 @@ public abstract class ExchangeFilterFunctions {
 			this.password = password;
 		}
 
-
 		/**
 		 * Return a {@literal Consumer} that stores the given user and password
 		 * as a request attribute of type {@code Credentials} that is in turn
@@ -174,22 +167,20 @@ public abstract class ExchangeFilterFunctions {
 		public static Consumer<Map<String, Object>> basicAuthenticationCredentials(String user, String password) {
 			Credentials credentials = new Credentials(user, password);
 			checkIllegalCharacters(user, password);
-			return map -> map.put(BASIC_AUTHENTICATION_CREDENTIALS_ATTRIBUTE, credentials);
+			return (map -> map.put(BASIC_AUTHENTICATION_CREDENTIALS_ATTRIBUTE, credentials));
 		}
 
-
 		@Override
-		public boolean equals(Object o) {
+		public boolean equals(Object other) {
-			if (this == o) {
+			if (this == other) {
 				return true;
 			}
-			if (o instanceof Credentials) {
+			if (!(other instanceof Credentials)) {
-				Credentials other = (Credentials) o;
-				return this.username.equals(other.username) &&
-						this.password.equals(other.password);
-			}
 				return false;
 			}
+			Credentials otherCred = (Credentials) other;
+			return (this.username.equals(otherCred.username) && this.password.equals(otherCred.password));
+		}
 
 		@Override
 		public int hashCode() {

spring-webflux/src/main/java/org/springframework/web/reactive/function/client/ExchangeFunctions.java

@@ -93,7 +93,6 @@ public abstract class ExchangeFunctions {
 		@Override
 		public Mono<ClientResponse> exchange(ClientRequest request) {
 			Assert.notNull(request, "ClientRequest must not be null");
-
 			HttpMethod httpMethod = request.method();
 			URI url = request.url();
 
@@ -112,7 +111,7 @@ public abstract class ExchangeFunctions {
 				String formatted = request.url().toString();
 				if (this.disableLoggingRequestDetails) {
 					int index = formatted.indexOf("?");
-					formatted = index != -1 ? formatted.substring(0, index) : formatted;
+					formatted = (index != -1 ? formatted.substring(0, index) : formatted);
 				}
 				logger.debug("HTTP " + request.method() + " " + formatted);
 			}

spring-webflux/src/main/java/org/springframework/web/reactive/function/server/DefaultServerRequestBuilder.java

@@ -233,7 +233,7 @@ class DefaultServerRequestBuilder implements ServerRequest.Builder {
 						value = UriUtils.decode(value, StandardCharsets.UTF_8);
 					}
 					else {
-						value = StringUtils.hasLength(eq) ? "" : null;
+						value = (StringUtils.hasLength(eq) ? "" : null);
 					}
 					queryParams.add(name, value);
 				}

spring-webflux/src/main/java/org/springframework/web/reactive/function/server/support/RouterFunctionMapping.java

@@ -36,8 +36,8 @@ import org.springframework.web.server.ServerWebExchange;
 /**
  * {@code HandlerMapping} implementation that supports {@link RouterFunction RouterFunctions}.
  * <p>If no {@link RouterFunction} is provided at
- * {@linkplain #RouterFunctionMapping(RouterFunction) construction time}, this mapping will detect
+ * {@linkplain #RouterFunctionMapping(RouterFunction) construction time}, this mapping
- * all router functions in the application context, and consult them in
+ * will detect all router functions in the application context, and consult them in
  * {@linkplain org.springframework.core.annotation.Order order}.
  *
  * @author Arjen Poutsma
@@ -114,7 +114,7 @@ public class RouterFunctionMapping extends AbstractHandlerMapping implements Ini
 		SortedRouterFunctionsContainer container = new SortedRouterFunctionsContainer();
 		obtainApplicationContext().getAutowireCapableBeanFactory().autowireBean(container);
 		List<RouterFunction<?>> functions = container.routerFunctions;
-		return CollectionUtils.isEmpty(functions) ? Collections.emptyList() : functions;
+		return (!CollectionUtils.isEmpty(functions) ? functions : Collections.emptyList());
 	}
 
 	private void logRouterFunctions(List<RouterFunction<?>> routerFunctions) {

spring-webflux/src/main/java/org/springframework/web/reactive/resource/AbstractPrefixVersionStrategy.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,14 +38,14 @@ public abstract class AbstractPrefixVersionStrategy implements VersionStrategy {
 
 
 	protected AbstractPrefixVersionStrategy(String version) {
-		Assert.hasText(version, "'version' must not be empty");
+		Assert.hasText(version, "Version must not be empty");
 		this.prefix = version;
 	}
 
 
 	@Override
 	public String extractVersion(String requestPath) {
-		return requestPath.startsWith(this.prefix) ? this.prefix : null;
+		return (requestPath.startsWith(this.prefix) ? this.prefix : null);
 	}
 
 	@Override

spring-webflux/src/main/java/org/springframework/web/reactive/resource/CachingResourceResolver.java

@@ -82,18 +82,15 @@ public class CachingResourceResolver extends AbstractResourceResolver {
 	/**
 	 * Configure the supported content codings from the
 	 * {@literal "Accept-Encoding"} header for which to cache resource variations.
-	 *
 	 * <p>The codings configured here are generally expected to match those
 	 * configured on {@link EncodedResourceResolver#setContentCodings(List)}.
-	 *
 	 * <p>By default this property is set to {@literal ["br", "gzip"]} based on
 	 * the value of {@link EncodedResourceResolver#DEFAULT_CODINGS}.
-	 *
 	 * @param codings one or more supported content codings
 	 * @since 5.1
 	 */
 	public void setContentCodings(List<String> codings) {
-		Assert.notEmpty(codings, "At least one content coding expected.");
+		Assert.notEmpty(codings, "At least one content coding expected");
 		this.contentCodings.clear();
 		this.contentCodings.addAll(codings);
 	}

spring-webflux/src/main/java/org/springframework/web/reactive/resource/CssLinkResourceTransformer.java

@@ -36,7 +36,6 @@ import org.springframework.core.io.Resource;
 import org.springframework.core.io.buffer.DataBuffer;
 import org.springframework.core.io.buffer.DataBufferFactory;
 import org.springframework.core.io.buffer.DataBufferUtils;
-import org.springframework.lang.Nullable;
 import org.springframework.util.StreamUtils;
 import org.springframework.util.StringUtils;
 import org.springframework.web.server.ServerWebExchange;
@@ -281,20 +280,20 @@ public class CssLinkResourceTransformer extends ResourceTransformerSupport {
 
 		@Override
 		public int compareTo(ContentChunkInfo other) {
-			return (this.start < other.start ? -1 : (this.start == other.start ? 0 : 1));
+			return Integer.compare(this.start, other.start);
 		}
 
 		@Override
-		public boolean equals(@Nullable Object obj) {
+		public boolean equals(Object other) {
-			if (this == obj) {
+			if (this == other) {
 				return true;
 			}
-			if (obj != null && obj instanceof ContentChunkInfo) {
+			if (!(other instanceof ContentChunkInfo)) {
-				ContentChunkInfo other = (ContentChunkInfo) obj;
-				return (this.start == other.start && this.end == other.end);
-			}
 				return false;
 			}
+			ContentChunkInfo otherCci = (ContentChunkInfo) other;
+			return (this.start == otherCci.start && this.end == otherCci.end);
+		}
 
 		@Override
 		public int hashCode() {

spring-webflux/src/main/java/org/springframework/web/reactive/resource/EncodedResourceResolver.java

@@ -78,27 +78,22 @@ public class EncodedResourceResolver extends AbstractResourceResolver {
 	 * coding that is present in the {@literal "Accept-Encoding"} header for a
 	 * given request, and that has a file present with the associated extension,
 	 * is used.
-	 *
 	 * <p><strong>Note:</strong> Each coding must be associated with a file
 	 * extension via {@link #registerExtension} or {@link #setExtensions}. Also
 	 * customizations to the list of codings here should be matched by
 	 * customizations to the same list in {@link CachingResourceResolver} to
 	 * ensure encoded variants of a resource are cached under separate keys.
-	 *
 	 * <p>By default this property is set to {@literal ["br", "gzip"]}.
-	 *
 	 * @param codings one or more supported content codings
-	 * @since 5.1
 	 */
 	public void setContentCodings(List<String> codings) {
-		Assert.notEmpty(codings, "At least one content coding expected.");
+		Assert.notEmpty(codings, "At least one content coding expected");
 		this.contentCodings.clear();
 		this.contentCodings.addAll(codings);
 	}
 
 	/**
 	 * Return a read-only list with the supported content codings.
-	 * @since 5.1
 	 */
 	public List<String> getContentCodings() {
 		return Collections.unmodifiableList(this.contentCodings);
@@ -110,31 +105,28 @@ public class EncodedResourceResolver extends AbstractResourceResolver {
 	 * <p>By default this is configured with {@literal ["br" -> ".br"]} and
 	 * {@literal ["gzip" -> ".gz"]}.
 	 * @param extensions the extensions to use.
-	 * @since 5.1
 	 * @see #registerExtension(String, String)
 	 */
 	public void setExtensions(Map<String, String> extensions) {
 		extensions.forEach(this::registerExtension);
 	}
 
-	/**
-	 * Java config friendly alternative to {@link #setExtensions(Map)}.
-	 * @param coding the content coding
-	 * @param extension the associated file extension
-	 * @since 5.1
-	 */
-	public void registerExtension(String coding, String extension) {
-		this.extensions.put(coding, extension.startsWith(".") ? extension : "." + extension);
-	}
-
 	/**
 	 * Return a read-only map with coding-to-extension mappings.
-	 * @since 5.1
 	 */
 	public Map<String, String> getExtensions() {
 		return Collections.unmodifiableMap(this.extensions);
 	}
 
+	/**
+	 * Java config friendly alternative to {@link #setExtensions(Map)}.
+	 * @param coding the content coding
+	 * @param extension the associated file extension
+	 */
+	public void registerExtension(String coding, String extension) {
+		this.extensions.put(coding, (extension.startsWith(".") ? extension : "." + extension));
+	}
+
 
 	@Override
 	protected Mono<Resource> resolveResourceInternal(@Nullable ServerWebExchange exchange,
@@ -174,12 +166,12 @@ public class EncodedResourceResolver extends AbstractResourceResolver {
 	private String getAcceptEncoding(ServerWebExchange exchange) {
 		ServerHttpRequest request = exchange.getRequest();
 		String header = request.getHeaders().getFirst(HttpHeaders.ACCEPT_ENCODING);
-		return header != null ? header.toLowerCase() : null;
+		return (header != null ? header.toLowerCase() : null);
 	}
 
 	private String getExtension(String coding) {
 		String extension = this.extensions.get(coding);
-		Assert.notNull(extension, "No file extension associated with content coding " + coding);
+		Assert.state(extension != null, () -> "No file extension associated with content coding " + coding);
 		return extension;
 	}
 
@@ -202,7 +194,6 @@ public class EncodedResourceResolver extends AbstractResourceResolver {
 
 		private final Resource encoded;
 
-
 		EncodedResource(Resource original, String coding, String extension) throws IOException {
 			this.original = original;
 			this.coding = coding;

spring-webflux/src/main/java/org/springframework/web/reactive/resource/ResourceWebHandler.java

@@ -388,8 +388,8 @@ public class ResourceWebHandler implements WebHandler, InitializingBean {
 			return Mono.empty();
 		}
 
-		Assert.notNull(this.resolverChain, "ResourceResolverChain not initialized.");
+		Assert.state(this.resolverChain != null, "ResourceResolverChain not initialized");
-		Assert.notNull(this.transformerChain, "ResourceTransformerChain not initialized.");
+		Assert.state(this.transformerChain != null, "ResourceTransformerChain not initialized");
 
 		return this.resolverChain.resolveResource(exchange, path, getLocations())
 				.flatMap(resource -> this.transformerChain.transform(exchange, resource));
@@ -419,7 +419,7 @@ public class ResourceWebHandler implements WebHandler, InitializingBean {
 		for (int i = 0; i < path.length(); i++) {
 			char curr = path.charAt(i);
 			try {
-				if ((curr == '/') && (prev == '/')) {
+				if (curr == '/' && prev == '/') {
 					if (sb == null) {
 						sb = new StringBuilder(path.substring(0, i));
 					}
@@ -433,7 +433,7 @@ public class ResourceWebHandler implements WebHandler, InitializingBean {
 				prev = curr;
 			}
 		}
-		return sb != null ? sb.toString() : path;
+		return (sb != null ? sb.toString() : path);
 	}
 
 	private String cleanLeadingSlash(String path) {
@@ -446,7 +446,7 @@ public class ResourceWebHandler implements WebHandler, InitializingBean {
 				if (i == 0 || (i == 1 && slash)) {
 					return path;
 				}
-				return slash ? "/" + path.substring(i) : path.substring(i);
+				return (slash ? "/" + path.substring(i) : path.substring(i));
 			}
 		}
 		return (slash ? "/" : "");

spring-webflux/src/main/java/org/springframework/web/reactive/result/condition/AbstractMediaTypeExpression.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
 import org.springframework.http.MediaType;
+import org.springframework.lang.Nullable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.server.NotAcceptableStatusException;
 import org.springframework.web.server.ServerWebExchange;
@@ -89,16 +90,16 @@ abstract class AbstractMediaTypeExpression implements Comparable<AbstractMediaTy
 	}
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(@Nullable Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (obj != null && getClass() == obj.getClass()) {
+		if (other == null || getClass() != other.getClass()) {
-			AbstractMediaTypeExpression other = (AbstractMediaTypeExpression) obj;
-			return (this.mediaType.equals(other.mediaType) && this.isNegated == other.isNegated);
-		}
 			return false;
 		}
+		AbstractMediaTypeExpression otherExpr = (AbstractMediaTypeExpression) other;
+		return (this.mediaType.equals(otherExpr.mediaType) && this.isNegated == otherExpr.isNegated);
+	}
 
 	@Override
 	public int hashCode() {

spring-webflux/src/main/java/org/springframework/web/reactive/result/condition/AbstractNameValueExpression.java

@@ -92,20 +92,17 @@ abstract class AbstractNameValueExpression<T> implements NameValueExpression<T>
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(@Nullable Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (obj != null && obj instanceof AbstractNameValueExpression) {
+		if (other == null || getClass() != other.getClass()) {
-			AbstractNameValueExpression<?> other = (AbstractNameValueExpression<?>) obj;
-			String thisName = isCaseSensitiveName() ? this.name : this.name.toLowerCase();
-			String otherName = isCaseSensitiveName() ? other.name : other.name.toLowerCase();
-			return ((thisName.equalsIgnoreCase(otherName)) &&
-					(this.value != null ? this.value.equals(other.value) : other.value == null) &&
-					this.isNegated == other.isNegated);
-		}
 			return false;
 		}
+		AbstractNameValueExpression<?> that = (AbstractNameValueExpression<?>) other;
+		return ((isCaseSensitiveName() ? this.name.equals(that.name) : this.name.equalsIgnoreCase(that.name)) &&
+				ObjectUtils.nullSafeEquals(this.value, that.value) && this.isNegated == that.isNegated);
+	}
 
 	@Override
 	public int hashCode() {
@@ -134,4 +131,5 @@ abstract class AbstractNameValueExpression<T> implements NameValueExpression<T>
 		}
 		return builder.toString();
 	}
+
 }

spring-webflux/src/main/java/org/springframework/web/reactive/result/condition/AbstractRequestCondition.java

@@ -19,6 +19,8 @@ package org.springframework.web.reactive.result.condition;
 import java.util.Collection;
 import java.util.Iterator;
 
+import org.springframework.lang.Nullable;
+
 /**
  * A base class for {@link RequestCondition} types providing implementations of
  * {@link #equals(Object)}, {@link #hashCode()}, and {@link #toString()}.
@@ -28,20 +30,18 @@ import java.util.Iterator;
  * @param <T> the type of objects that this RequestCondition can be combined
  * with and compared to
  */
-public abstract class AbstractRequestCondition<T extends AbstractRequestCondition<T>>
+public abstract class AbstractRequestCondition<T extends AbstractRequestCondition<T>> implements RequestCondition<T> {
-		implements RequestCondition<T> {
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(@Nullable Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (obj != null && getClass() == obj.getClass()) {
+		if (other == null || getClass() != other.getClass()) {
-			AbstractRequestCondition<?> other = (AbstractRequestCondition<?>) obj;
-			return getContent().equals(other.getContent());
-		}
 			return false;
 		}
+		return getContent().equals(((AbstractRequestCondition<?>) other).getContent());
+	}
 
 	@Override
 	public int hashCode() {

spring-webflux/src/main/java/org/springframework/web/reactive/result/condition/CompositeRequestCondition.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -91,7 +91,7 @@ public class CompositeRequestCondition extends AbstractRequestCondition<Composit
 
 	@Override
 	protected Collection<?> getContent() {
-		return (isEmpty()) ? Collections.emptyList() : getConditions();
+		return (!isEmpty() ? getConditions() : Collections.emptyList());
 	}
 
 	@Override

spring-webflux/src/main/java/org/springframework/web/reactive/result/condition/ConsumesRequestCondition.java

@@ -145,7 +145,7 @@ public final class ConsumesRequestCondition extends AbstractRequestCondition<Con
 	 */
 	@Override
 	public ConsumesRequestCondition combine(ConsumesRequestCondition other) {
-		return !other.expressions.isEmpty() ? other : this;
+		return (!other.expressions.isEmpty() ? other : this);
 	}
 
 	/**
@@ -168,7 +168,7 @@ public final class ConsumesRequestCondition extends AbstractRequestCondition<Con
 		}
 		Set<ConsumeMediaTypeExpression> result = new LinkedHashSet<>(this.expressions);
 		result.removeIf(expression -> !expression.match(exchange));
-		return (result.isEmpty()) ? null : new ConsumesRequestCondition(result);
+		return (!result.isEmpty() ? new ConsumesRequestCondition(result) : null);
 	}
 
 	/**

spring-webflux/src/main/java/org/springframework/web/reactive/result/condition/PatternsRequestCondition.java

@@ -56,14 +56,9 @@ public final class PatternsRequestCondition extends AbstractRequestCondition<Pat
 	 * Creates a new instance with the given {@code Stream} of URL patterns.
 	 */
 	public PatternsRequestCondition(List<PathPattern> patterns) {
-		this(toSortedSet(patterns));
+		this(new TreeSet<>(patterns));
 	}
 
-	private static SortedSet<PathPattern> toSortedSet(Collection<PathPattern> patterns) {
-		TreeSet<PathPattern> sorted = new TreeSet<>();
-		sorted.addAll(patterns);
-		return sorted;
-	}
 
 	private PatternsRequestCondition(SortedSet<PathPattern> patterns) {
 		this.patterns = patterns;
@@ -127,8 +122,7 @@ public final class PatternsRequestCondition extends AbstractRequestCondition<Pat
 			return this;
 		}
 		SortedSet<PathPattern> matches = getMatchingPatterns(exchange);
-		return matches.isEmpty() ? null :
+		return (!matches.isEmpty() ? new PatternsRequestCondition(matches) : null);
-				new PatternsRequestCondition(matches);
 	}
 
 	/**

spring-webflux/src/main/java/org/springframework/web/reactive/result/condition/ProducesRequestCondition.java

@@ -192,7 +192,7 @@ public final class ProducesRequestCondition extends AbstractRequestCondition<Pro
 		}
 		Set<ProduceMediaTypeExpression> result = new LinkedHashSet<>(this.expressions);
 		result.removeIf(expression -> !expression.match(exchange));
-		return (result.isEmpty()) ? null : new ProducesRequestCondition(result, this.contentTypeResolver);
+		return (!result.isEmpty() ? new ProducesRequestCondition(result, this.contentTypeResolver) : null);
 	}
 
 	/**
@@ -273,7 +273,7 @@ public final class ProducesRequestCondition extends AbstractRequestCondition<Pro
 			ProduceMediaTypeExpression expr1 = condition1.getExpressionsToCompare().get(index1);
 			ProduceMediaTypeExpression expr2 = condition2.getExpressionsToCompare().get(index2);
 			result = expr1.compareTo(expr2);
-			result = (result != 0) ? result : expr1.getMediaType().compareTo(expr2.getMediaType());
+			result = (result != 0 ? result : expr1.getMediaType().compareTo(expr2.getMediaType()));
 		}
 		return result;
 	}

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/InvocableHandlerMethod.java

@@ -130,8 +130,8 @@ public class InvocableHandlerMethod extends HandlerMethod {
 	 * @param providedArgs optional list of argument values to match by type
 	 * @return a Mono with a {@link HandlerResult}.
 	 */
-	public Mono<HandlerResult> invoke(ServerWebExchange exchange, BindingContext bindingContext,
+	public Mono<HandlerResult> invoke(
-			Object... providedArgs) {
+			ServerWebExchange exchange, BindingContext bindingContext, Object... providedArgs) {
 
 		return resolveArguments(exchange, bindingContext, providedArgs).flatMap(args -> {
 			Object value;
@@ -161,7 +161,7 @@ public class InvocableHandlerMethod extends HandlerMethod {
 			ReactiveAdapter adapter = this.reactiveAdapterRegistry.getAdapter(returnType.getParameterType());
 			boolean asyncVoid = isAsyncVoidReturnType(returnType, adapter);
 			if ((value == null || asyncVoid) && isResponseHandled(args, exchange)) {
-				return asyncVoid ? Mono.from(adapter.toPublisher(value)) : Mono.empty();
+				return (asyncVoid ? Mono.from(adapter.toPublisher(value)) : Mono.empty());
 			}
 
 			HandlerResult result = new HandlerResult(this, value, returnType, bindingContext);
@@ -169,8 +169,8 @@ public class InvocableHandlerMethod extends HandlerMethod {
 		});
 	}
 
-	private Mono<Object[]> resolveArguments(ServerWebExchange exchange, BindingContext bindingContext,
+	private Mono<Object[]> resolveArguments(
-			Object... providedArgs) {
+			ServerWebExchange exchange, BindingContext bindingContext, Object... providedArgs) {
 
 		if (ObjectUtils.isEmpty(getMethodParameters())) {
 			return EMPTY_ARGS;

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/RequestMappingInfo.java

@@ -487,8 +487,8 @@ public final class RequestMappingInfo implements RequestCondition<RequestMapping
 		public RequestMappingInfo build() {
 			RequestedContentTypeResolver contentTypeResolver = this.options.getContentTypeResolver();
 
-			PathPatternParser parser = this.options.getPatternParser() != null ?
+			PathPatternParser parser = (this.options.getPatternParser() != null ?
-					this.options.getPatternParser() : new PathPatternParser();
+					this.options.getPatternParser() : new PathPatternParser());
 			PatternsRequestCondition patternsCondition = new PatternsRequestCondition(parse(this.paths, parser));
 
 			return new RequestMappingInfo(this.mappingName, patternsCondition,

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/AbstractMessageReaderArgumentResolver.java

@@ -89,8 +89,8 @@ public abstract class AbstractMessageReaderArgumentResolver extends HandlerMetho
 	 * @param messageReaders readers to convert from the request body
 	 * @param adapterRegistry for adapting to other reactive types from Flux and Mono
 	 */
-	protected AbstractMessageReaderArgumentResolver(List<HttpMessageReader<?>> messageReaders,
+	protected AbstractMessageReaderArgumentResolver(
-			ReactiveAdapterRegistry adapterRegistry) {
+			List<HttpMessageReader<?>> messageReaders, ReactiveAdapterRegistry adapterRegistry) {
 
 		super(adapterRegistry);
 		Assert.notEmpty(messageReaders, "At least one HttpMessageReader is required");
@@ -121,6 +121,7 @@ public abstract class AbstractMessageReaderArgumentResolver extends HandlerMetho
 	 */
 	protected Mono<Object> readBody(MethodParameter bodyParameter, boolean isBodyRequired,
 			BindingContext bindingContext, ServerWebExchange exchange) {
+
 		return this.readBody(bodyParameter, null, isBodyRequired, bindingContext, exchange);
 	}
 
@@ -139,7 +140,7 @@ public abstract class AbstractMessageReaderArgumentResolver extends HandlerMetho
 			boolean isBodyRequired, BindingContext bindingContext, ServerWebExchange exchange) {
 
 		ResolvableType bodyType = ResolvableType.forMethodParameter(bodyParam);
-		ResolvableType actualType = actualParam == null ? bodyType : ResolvableType.forMethodParameter(actualParam);
+		ResolvableType actualType = (actualParam != null ? ResolvableType.forMethodParameter(actualParam) : bodyType);
 		Class<?> resolvedType = bodyType.resolve();
 		ReactiveAdapter adapter = (resolvedType != null ? getAdapterRegistry().getAdapter(resolvedType) : null);
 		ResolvableType elementType = (adapter != null ? bodyType.getGeneric() : bodyType);
@@ -190,7 +191,7 @@ public abstract class AbstractMessageReaderArgumentResolver extends HandlerMetho
 						mono = mono.doOnNext(target ->
 								validate(target, hints, bodyParam, bindingContext, exchange));
 					}
-					return adapter != null ? Mono.just(adapter.fromPublisher(mono)) : Mono.from(mono);
+					return (adapter != null ? Mono.just(adapter.fromPublisher(mono)) : Mono.from(mono));
 				}
 			}
 		}

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/AbstractMessageWriterResultHandler.java

@@ -103,8 +103,8 @@ public abstract class AbstractMessageWriterResultHandler extends HandlerResultHa
 	 * Write a given body to the response with {@link HttpMessageWriter}.
 	 * @param body the object to write
 	 * @param bodyParameter the {@link MethodParameter} of the body to write
-	 * @param actualParameter the actual return type of the method that returned the
+	 * @param actualParam the actual return type of the method that returned the value;
-	 * value; could be different from {@code bodyParameter} when processing {@code HttpEntity}
+	 * could be different from {@code bodyParameter} when processing {@code HttpEntity}
 	 * for example
 	 * @param exchange the current exchange
 	 * @return indicates completion or error
@@ -112,11 +112,10 @@ public abstract class AbstractMessageWriterResultHandler extends HandlerResultHa
 	 */
 	@SuppressWarnings({ "unchecked", "rawtypes" })
 	protected Mono<Void> writeBody(@Nullable Object body, MethodParameter bodyParameter,
-			@Nullable MethodParameter actualParameter, ServerWebExchange exchange) {
+			@Nullable MethodParameter actualParam, ServerWebExchange exchange) {
 
 		ResolvableType bodyType = ResolvableType.forMethodParameter(bodyParameter);
-		ResolvableType actualType = (actualParameter == null ?
+		ResolvableType actualType = (actualParam != null ? ResolvableType.forMethodParameter(actualParam) : bodyType);
-				bodyType : ResolvableType.forMethodParameter(actualParameter));
 		Class<?> bodyClass = bodyType.resolve();
 		ReactiveAdapter adapter = getAdapterRegistry().getAdapter(bodyClass, body);
 

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/HttpEntityArgumentResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,9 +40,7 @@ import org.springframework.web.server.ServerWebExchange;
  */
 public class HttpEntityArgumentResolver extends AbstractMessageReaderArgumentResolver {
 
-	public HttpEntityArgumentResolver(List<HttpMessageReader<?>> readers,
+	public HttpEntityArgumentResolver(List<HttpMessageReader<?>> readers, ReactiveAdapterRegistry registry) {
-			ReactiveAdapterRegistry registry) {
-
 		super(readers, registry);
 	}
 
@@ -64,9 +62,9 @@ public class HttpEntityArgumentResolver extends AbstractMessageReaderArgumentRes
 	}
 
 	private Object createEntity(@Nullable Object body, Class<?> entityType, ServerHttpRequest request) {
-		return RequestEntity.class.equals(entityType) ?
+		return (RequestEntity.class.equals(entityType) ?
 				new RequestEntity<>(body, request.getHeaders(), request.getMethod(), request.getURI()) :
-				new HttpEntity<>(body, request.getHeaders());
+				new HttpEntity<>(body, request.getHeaders()));
 	}
 
 }

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/PrincipalArgumentResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,7 +36,6 @@ import org.springframework.web.server.ServerWebExchange;
  */
 public class PrincipalArgumentResolver extends HandlerMethodArgumentResolverSupport {
 
-
 	public PrincipalArgumentResolver(ReactiveAdapterRegistry adapterRegistry) {
 		super(adapterRegistry);
 	}
@@ -48,12 +47,12 @@ public class PrincipalArgumentResolver extends HandlerMethodArgumentResolverSupp
 	}
 
 	@Override
-	public Mono<Object> resolveArgument(MethodParameter parameter, BindingContext context,
+	public Mono<Object> resolveArgument(
-			ServerWebExchange exchange) {
+			MethodParameter parameter, BindingContext context, ServerWebExchange exchange) {
 
 		Mono<Principal> principal = exchange.getPrincipal();
 		ReactiveAdapter adapter = getAdapterRegistry().getAdapter(parameter.getParameterType());
-		return adapter != null ? Mono.just(adapter.fromPublisher(principal)) : Mono.from(principal);
+		return (adapter != null ? Mono.just(adapter.fromPublisher(principal)) : Mono.from(principal));
 	}
 
 }

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/RequestPartMethodArgumentResolver.java

@@ -51,7 +51,6 @@ import org.springframework.web.server.ServerWebInputException;
  */
 public class RequestPartMethodArgumentResolver extends AbstractMessageReaderArgumentResolver {
 
-
 	public RequestPartMethodArgumentResolver(List<HttpMessageReader<?>> readers,
 			ReactiveAdapterRegistry registry) {
 
@@ -78,9 +77,7 @@ public class RequestPartMethodArgumentResolver extends AbstractMessageReaderArgu
 				.flatMapMany(map -> {
 					List<Part> list = map.get(name);
 					if (CollectionUtils.isEmpty(list)) {
-						return isRequired ?
+						return (isRequired ? Flux.error(getMissingPartException(name, parameter)) : Flux.empty());
-								Flux.error(getMissingPartException(name, parameter)) :
-								Flux.empty();
 					}
 					return Flux.fromIterable(list);
 				});
@@ -105,7 +102,7 @@ public class RequestPartMethodArgumentResolver extends AbstractMessageReaderArgu
 			// Mono<Part> or Flux<Part>
 			MethodParameter elementType = parameter.nested();
 			if (Part.class.isAssignableFrom(elementType.getNestedParameterType())) {
-				parts = adapter.isMultiValue() ? parts : parts.take(1);
+				parts = (adapter.isMultiValue() ? parts : parts.take(1));
 				return Mono.just(adapter.fromPublisher(parts));
 			}
 			// We have to decode the content for each part, one at a time

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/ServerWebExchangeArgumentResolver.java

@@ -102,12 +102,12 @@ public class ServerWebExchangeArgumentResolver extends HandlerMethodArgumentReso
 		else if (TimeZone.class == paramType) {
 			LocaleContext localeContext = exchange.getLocaleContext();
 			TimeZone timeZone = getTimeZone(localeContext);
-			return timeZone != null ? timeZone : TimeZone.getDefault();
+			return (timeZone != null ? timeZone : TimeZone.getDefault());
 		}
 		else if (ZoneId.class == paramType) {
 			LocaleContext localeContext = exchange.getLocaleContext();
 			TimeZone timeZone = getTimeZone(localeContext);
-			return timeZone != null ? timeZone.toZoneId() : ZoneId.systemDefault();
+			return (timeZone != null ? timeZone.toZoneId() : ZoneId.systemDefault());
 		}
 		else if (UriBuilder.class == paramType || UriComponentsBuilder.class == paramType) {
 			URI uri = exchange.getRequest().getURI();

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/WebSessionArgumentResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -55,7 +55,7 @@ public class WebSessionArgumentResolver extends HandlerMethodArgumentResolverSup
 
 		Mono<WebSession> session = exchange.getSession();
 		ReactiveAdapter adapter = getAdapterRegistry().getAdapter(parameter.getParameterType());
-		return adapter != null ? Mono.just(adapter.fromPublisher(session)) : Mono.from(session);
+		return (adapter != null ? Mono.just(adapter.fromPublisher(session)) : Mono.from(session));
 	}
 
 }

spring-webflux/src/main/java/org/springframework/web/reactive/result/view/HttpMessageWriterView.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,8 +23,6 @@ import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.reactivestreams.Publisher;
 import reactor.core.publisher.Mono;
 
@@ -45,9 +43,6 @@ import org.springframework.web.server.ServerWebExchange;
  */
 public class HttpMessageWriterView implements View {
 
-	private static final Log logger = LogFactory.getLog(HttpMessageWriter.class);
-
-
 	private final HttpMessageWriter<?> writer;
 
 	private final Set<String> modelKeys = new HashSet<>(4);
@@ -66,7 +61,7 @@ public class HttpMessageWriterView implements View {
 	 * Constructor with a fully initialized {@link HttpMessageWriter}.
 	 */
 	public HttpMessageWriterView(HttpMessageWriter<?> writer) {
-		Assert.notNull(writer, "'writer' is required.");
+		Assert.notNull(writer, "HttpMessageWriter is required");
 		this.writer = writer;
 		this.canWriteMap = writer.canWrite(ResolvableType.forClass(Map.class), null);
 	}
@@ -118,12 +113,11 @@ public class HttpMessageWriterView implements View {
 
 	@Override
 	@SuppressWarnings("unchecked")
-	public Mono<Void> render(@Nullable Map<String, ?> model, @Nullable MediaType contentType,
+	public Mono<Void> render(
-			ServerWebExchange exchange) {
+			@Nullable Map<String, ?> model, @Nullable MediaType contentType, ServerWebExchange exchange) {
 
 		Object value = getObjectToRender(model);
-		return (value != null) ?
+		return (value != null ? write(value, contentType, exchange) : exchange.getResponse().setComplete());
-				write(value, contentType, exchange) : exchange.getResponse().setComplete();
 	}
 
 	@Nullable

spring-webflux/src/main/java/org/springframework/web/reactive/result/view/script/ScriptTemplateView.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -196,7 +196,7 @@ public class ScriptTemplateView extends AbstractUrlBasedView {
 		}
 		if (this.resourceLoaderPaths == null) {
 			String resourceLoaderPath = viewConfig.getResourceLoaderPath();
-			setResourceLoaderPath(resourceLoaderPath == null ? DEFAULT_RESOURCE_LOADER_PATH : resourceLoaderPath);
+			setResourceLoaderPath(resourceLoaderPath != null ? resourceLoaderPath : DEFAULT_RESOURCE_LOADER_PATH);
 		}
 		if (this.sharedEngine == null && viewConfig.isSharedEngine() != null) {
 			this.sharedEngine = viewConfig.isSharedEngine();

spring-webflux/src/main/java/org/springframework/web/reactive/socket/adapter/AbstractListenerWebSocketSession.java

@@ -80,8 +80,8 @@ public abstract class AbstractListenerWebSocketSession<T> extends AbstractWebSoc
 	 * @param handshakeInfo the handshake info
 	 * @param bufferFactory the DataBuffer factor for the current connection
 	 */
-	public AbstractListenerWebSocketSession(T delegate, String id, HandshakeInfo handshakeInfo,
+	public AbstractListenerWebSocketSession(
-			DataBufferFactory bufferFactory) {
+			T delegate, String id, HandshakeInfo handshakeInfo, DataBufferFactory bufferFactory) {
 
 		this(delegate, id, handshakeInfo, bufferFactory, null);
 	}
@@ -106,9 +106,8 @@ public abstract class AbstractListenerWebSocketSession<T> extends AbstractWebSoc
 
 	@Override
 	public Flux<WebSocketMessage> receive() {
-		return canSuspendReceiving() ?
+		return (canSuspendReceiving() ? Flux.from(this.receivePublisher) :
-				Flux.from(this.receivePublisher) :
+				Flux.from(this.receivePublisher).onBackpressureBuffer(RECEIVE_BUFFER_SIZE));
-				Flux.from(this.receivePublisher).onBackpressureBuffer(RECEIVE_BUFFER_SIZE);
 	}
 
 	@Override

spring-webflux/src/main/java/org/springframework/web/reactive/socket/server/upgrade/JettyRequestUpgradeStrategy.java

@@ -42,7 +42,6 @@ import org.springframework.web.reactive.socket.adapter.JettyWebSocketSession;
 import org.springframework.web.reactive.socket.server.RequestUpgradeStrategy;
 import org.springframework.web.server.ServerWebExchange;
 
-
 /**
  * A {@link RequestUpgradeStrategy} for use with Jetty.
  *
@@ -95,9 +94,9 @@ public class JettyRequestUpgradeStrategy implements RequestUpgradeStrategy, Life
 			if (!isRunning() && servletContext != null) {
 				this.running = true;
 				try {
-					this.factory = this.webSocketPolicy != null ?
+					this.factory = (this.webSocketPolicy != null ?
 							new WebSocketServerFactory(servletContext, this.webSocketPolicy) :
-							new WebSocketServerFactory(servletContext);
+							new WebSocketServerFactory(servletContext));
 					this.factory.setCreator((request, response) -> {
 						WebSocketHandlerContainer container = adapterHolder.get();
 						String protocol = container.getProtocol();

spring-webflux/src/test/java/org/springframework/web/reactive/result/condition/HeadersRequestConditionTests.java

@@ -37,7 +37,7 @@ public class HeadersRequestConditionTests {
 	public void headerEquals() {
 		assertEquals(new HeadersRequestCondition("foo"), new HeadersRequestCondition("foo"));
 		assertEquals(new HeadersRequestCondition("foo"), new HeadersRequestCondition("FOO"));
-		assertFalse(new HeadersRequestCondition("foo").equals(new HeadersRequestCondition("bar")));
+		assertNotEquals(new HeadersRequestCondition("foo"), new HeadersRequestCondition("bar"));
 		assertEquals(new HeadersRequestCondition("foo=bar"), new HeadersRequestCondition("foo=bar"));
 		assertEquals(new HeadersRequestCondition("foo=bar"), new HeadersRequestCondition("FOO=bar"));
 	}

spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/PathMatchConfigurer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -129,7 +129,9 @@ public class PathMatchConfigurer {
 	 * @since 5.1
 	 */
 	public PathMatchConfigurer addPathPrefix(String prefix, Predicate<Class<?>> predicate) {
-		this.pathPrefixes = this.pathPrefixes == null ? new LinkedHashMap<>() : this.pathPrefixes;
+		if (this.pathPrefixes == null) {
+			this.pathPrefixes = new LinkedHashMap<>();
+		}
 		this.pathPrefixes.put(prefix, predicate);
 		return this;
 	}

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/AbstractMediaTypeExpression.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -74,16 +74,16 @@ abstract class AbstractMediaTypeExpression implements MediaTypeExpression, Compa
 	}
 
 	@Override
-	public boolean equals(@Nullable Object obj) {
+	public boolean equals(@Nullable Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (obj != null && getClass() == obj.getClass()) {
+		if (other == null || getClass() != other.getClass()) {
-			AbstractMediaTypeExpression other = (AbstractMediaTypeExpression) obj;
-			return (this.mediaType.equals(other.mediaType) && this.isNegated == other.isNegated);
-		}
 			return false;
 		}
+		AbstractMediaTypeExpression otherExpr = (AbstractMediaTypeExpression) other;
+		return (this.mediaType.equals(otherExpr.mediaType) && this.isNegated == otherExpr.isNegated);
+	}
 
 	@Override
 	public int hashCode() {

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/AbstractNameValueExpression.java

@@ -19,6 +19,7 @@ package org.springframework.web.servlet.mvc.condition;
 import javax.servlet.http.HttpServletRequest;
 
 import org.springframework.lang.Nullable;
+import org.springframework.util.ObjectUtils;
 
 /**
  * Supports "name=value" style expressions as described in:
@@ -93,20 +94,17 @@ abstract class AbstractNameValueExpression<T> implements NameValueExpression<T>
 
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(@Nullable Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (obj instanceof AbstractNameValueExpression) {
+		if (other == null || getClass() != other.getClass()) {
-			AbstractNameValueExpression<?> other = (AbstractNameValueExpression<?>) obj;
-			String thisName = (isCaseSensitiveName() ? this.name : this.name.toLowerCase());
-			String otherName = (isCaseSensitiveName() ? other.name : other.name.toLowerCase());
-			return (thisName.equalsIgnoreCase(otherName) &&
-					(this.value != null ? this.value.equals(other.value) : other.value == null) &&
-					this.isNegated == other.isNegated);
-		}
 			return false;
 		}
+		AbstractNameValueExpression<?> that = (AbstractNameValueExpression<?>) other;
+		return ((isCaseSensitiveName() ? this.name.equals(that.name) : this.name.equalsIgnoreCase(that.name)) &&
+				ObjectUtils.nullSafeEquals(this.value, that.value) && this.isNegated == that.isNegated);
+	}
 
 	@Override
 	public int hashCode() {

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/AbstractRequestCondition.java

@@ -57,16 +57,15 @@ public abstract class AbstractRequestCondition<T extends AbstractRequestConditio
 
 
 	@Override
-	public boolean equals(@Nullable Object obj) {
+	public boolean equals(@Nullable Object other) {
-		if (this == obj) {
+		if (this == other) {
 			return true;
 		}
-		if (obj != null && getClass() == obj.getClass()) {
+		if (other == null || getClass() != other.getClass()) {
-			AbstractRequestCondition<?> other = (AbstractRequestCondition<?>) obj;
-			return getContent().equals(other.getContent());
-		}
 			return false;
 		}
+		return getContent().equals(((AbstractRequestCondition<?>) other).getContent());
+	}
 
 	@Override
 	public int hashCode() {

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/CompositeRequestCondition.java

@@ -92,7 +92,7 @@ public class CompositeRequestCondition extends AbstractRequestCondition<Composit
 
 	@Override
 	protected Collection<?> getContent() {
-		return (isEmpty()) ? Collections.emptyList() : getConditions();
+		return (!isEmpty() ? getConditions() : Collections.emptyList());
 	}
 
 	@Override

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/ConsumesRequestCondition.java

@@ -146,7 +146,7 @@ public final class ConsumesRequestCondition extends AbstractRequestCondition<Con
 	 */
 	@Override
 	public ConsumesRequestCondition combine(ConsumesRequestCondition other) {
-		return !other.expressions.isEmpty() ? other : this;
+		return (!other.expressions.isEmpty() ? other : this);
 	}
 
 	/**