Polishing

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

@@ -126,7 +126,8 @@ public interface BeanDefinition extends AttributeAccessor, BeanMetadataElement {
 	void setScope(@Nullable String scope);
 
 	/**
-	 * Return the name of the current target scope for this bean.
+	 * Return the name of the current target scope for this bean,
+	 * or {@code null} if not known yet.
 	 */
 	@Nullable
 	String getScope();

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

@@ -368,18 +368,6 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 		}
 
 		// Check if required type matches the type of the actual bean instance.
-		// Note that the following return declarations are technically violating the
-		// non-null policy for the getBean methods: However, these will only result
-		// in null under very specific circumstances: such as a user-declared factory
-		// method returning null or a user-provided FactoryBean.getObject() returning
-		// null, without any custom post-processing of such null values. We will pass
-		// them on as null to corresponding injection points in that exceptional case
-		// but do not expect user-level getBean callers to deal with such null values.
-		// In the end, regular getBean callers should be able to assign the outcome
-		// to non-null variables/arguments without being compromised by rather esoteric
-		// corner cases, in particular in functional configuration and Kotlin scenarios.
-		// A future Spring generation might eventually forbid null values completely
-		// and throw IllegalStateExceptions instead of leniently passing them through.
 		if (requiredType != null && !requiredType.isInstance(bean)) {
 			try {
 				T convertedBean = getTypeConverter().convertIfNecessary(bean, requiredType);
@@ -396,8 +384,6 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 				throw new BeanNotOfRequiredTypeException(name, requiredType, bean.getClass());
 			}
 		}
-		// For the nullability warning, see the elaboration in the comment above;
-		// in short: This is never going to be null unless user-declared code enforces null.
 		return (T) bean;
 	}
 

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

@@ -71,7 +71,7 @@ import org.springframework.core.env.ConfigurableEnvironment;
  * {@code @Profile} can therefore not be used to select an overloaded method with a
  * particular argument signature over another; resolution between all factory methods
  * for the same bean follows Spring's constructor resolution algorithm at creation time.
- * <b>Use distinct Java method names pointing to the same {@link @Bean#name bean name}
+ * <b>Use distinct Java method names pointing to the same {@link Bean#name bean name}
  * if you'd like to define alternative beans with different profile conditions</b>;
  * see {@code ProfileDatabaseConfig} in {@link Configuration @Configuration}'s javadoc.
  *

spring-web/src/main/java/org/springframework/web/bind/WebDataBinder.java

@@ -295,7 +295,9 @@ public class WebDataBinder extends DataBinder {
 			}
 		}
 		catch (IllegalArgumentException ex) {
-			logger.debug("Failed to create default value - falling back to null: " + ex.getMessage());
+			if (logger.isDebugEnabled()) {
+				logger.debug("Failed to create default value - falling back to null: " + ex.getMessage());
+			}
 		}
 		// Default value: null.
 		return null;