Polishing

spring-aop/src/main/java/org/springframework/aop/aspectj/AspectJAdviceParameterNameDiscoverer.java

@@ -347,14 +347,14 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 					// Second candidate we've found - ambiguous binding
 					throw new AmbiguousBindingException("Binding of throwing parameter '" +
 							this.throwingName + "' is ambiguous: could be bound to argument " +
-							throwableIndex + " or argument " + i);
+							throwableIndex + " or " + i);
 				}
 			}
 		}
 
 		if (throwableIndex == -1) {
-			throw new IllegalStateException("Binding of throwing parameter '" + this.throwingName
+			throw new IllegalStateException("Binding of throwing parameter '" + this.throwingName +
-					+ "' could not be completed as no available arguments are a subtype of Throwable");
+					"' could not be completed as no available arguments are a subtype of Throwable");
 		}
 		else {
 			bindParameterName(throwableIndex, this.throwingName);
@@ -373,7 +373,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 		if (this.returningName != null) {
 			if (this.numberOfRemainingUnboundArguments > 1) {
 				throw new AmbiguousBindingException("Binding of returning parameter '" + this.returningName +
-						"' is ambiguous, there are " + this.numberOfRemainingUnboundArguments + " candidates.");
+						"' is ambiguous: there are " + this.numberOfRemainingUnboundArguments + " candidates.");
 			}
 
 			// We're all set... find the unbound parameter, and bind it.
@@ -429,7 +429,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 			int numAnnotationSlots = countNumberOfUnboundAnnotationArguments();
 			if (numAnnotationSlots > 1) {
 				throw new AmbiguousBindingException("Found " + varNames.size() +
-						" potential annotation variable(s), and " +
+						" potential annotation variable(s) and " +
 						numAnnotationSlots + " potential argument slots");
 			}
 			else if (numAnnotationSlots == 1) {
@@ -486,7 +486,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 	private void maybeBindThisOrTargetOrArgsFromPointcutExpression() {
 		if (this.numberOfRemainingUnboundArguments > 1) {
 			throw new AmbiguousBindingException("Still " + this.numberOfRemainingUnboundArguments
-					+ " unbound args at this(),target(),args() binding stage, with no way to determine between them");
+					+ " unbound args at this()/target()/args() binding stage, with no way to determine between them");
 		}
 
 		List<String> varNames = new ArrayList<>();
@@ -520,7 +520,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 
 		if (varNames.size() > 1) {
 			throw new AmbiguousBindingException("Found " + varNames.size() +
-					" candidate this(), target() or args() variables but only one unbound argument slot");
+					" candidate this(), target(), or args() variables but only one unbound argument slot");
 		}
 		else if (varNames.size() == 1) {
 			for (int j = 0; j < this.parameterNameBindings.length; j++) {
@@ -646,8 +646,8 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 	private void maybeBindPrimitiveArgsFromPointcutExpression() {
 		int numUnboundPrimitives = countNumberOfUnboundPrimitiveArguments();
 		if (numUnboundPrimitives > 1) {
-			throw new AmbiguousBindingException("Found '" + numUnboundPrimitives +
+			throw new AmbiguousBindingException("Found " + numUnboundPrimitives +
-					"' unbound primitive arguments with no way to distinguish between them.");
+					" unbound primitive arguments with no way to distinguish between them.");
 		}
 		if (numUnboundPrimitives == 1) {
 			// Look for arg variable and bind it if we find exactly one...

spring-aop/src/test/java/org/springframework/aop/aspectj/AspectJAdviceParameterNameDiscovererTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -17,7 +17,6 @@
 package org.springframework.aop.aspectj;
 
 import java.lang.reflect.Method;
-import java.util.Arrays;
 
 import org.aspectj.lang.JoinPoint;
 import org.aspectj.lang.ProceedingJoinPoint;
@@ -43,17 +42,17 @@ class AspectJAdviceParameterNameDiscovererTests {
 
 		@Test
 		void noArgs() {
-			assertParameterNames(getMethod("noArgs"), "execution(* *(..))", new String[0]);
+			assertParameterNames(getMethod("noArgs"), "execution(* *(..))");
 		}
 
 		@Test
 		void joinPointOnly() {
-			assertParameterNames(getMethod("tjp"), "execution(* *(..))", new String[] {"thisJoinPoint"});
+			assertParameterNames(getMethod("tjp"), "execution(* *(..))", "thisJoinPoint");
 		}
 
 		@Test
 		void joinPointStaticPartOnly() {
-			assertParameterNames(getMethod("tjpsp"), "execution(* *(..))", new String[] {"thisJoinPointStaticPart"});
+			assertParameterNames(getMethod("tjpsp"), "execution(* *(..))", "thisJoinPointStaticPart");
 		}
 
 		@Test
@@ -64,18 +63,18 @@ class AspectJAdviceParameterNameDiscovererTests {
 
 		@Test
 		void oneThrowable() {
-			assertParameterNames(getMethod("oneThrowable"), "foo()", null, "ex", new String[] {"ex"});
+			assertParameterNamesExtended(getMethod("oneThrowable"), "foo()", null, "ex", "ex");
 		}
 
 		@Test
 		void oneJPAndOneThrowable() {
-			assertParameterNames(getMethod("jpAndOneThrowable"), "foo()", null, "ex", new String[] {"thisJoinPoint", "ex"});
+			assertParameterNamesExtended(getMethod("jpAndOneThrowable"), "foo()", null, "ex", "thisJoinPoint", "ex");
 		}
 
 		@Test
 		void oneJPAndTwoThrowables() {
 			assertException(getMethod("jpAndTwoThrowables"), "foo()", null, "ex", AmbiguousBindingException.class,
-					"Binding of throwing parameter 'ex' is ambiguous: could be bound to argument 1 or argument 2");
+					"Binding of throwing parameter 'ex' is ambiguous: could be bound to argument 1 or 2");
 		}
 
 		@Test
@@ -86,13 +85,13 @@ class AspectJAdviceParameterNameDiscovererTests {
 
 		@Test
 		void returning() {
-			assertParameterNames(getMethod("oneObject"), "foo()", "obj", null, new String[] {"obj"});
+			assertParameterNamesExtended(getMethod("oneObject"), "foo()", "obj", null, "obj");
 		}
 
 		@Test
 		void ambiguousReturning() {
 			assertException(getMethod("twoObjects"), "foo()", "obj", null, AmbiguousBindingException.class,
-					"Binding of returning parameter 'obj' is ambiguous, there are 2 candidates.");
+					"Binding of returning parameter 'obj' is ambiguous: there are 2 candidates.");
 		}
 
 		@Test
@@ -103,22 +102,22 @@ class AspectJAdviceParameterNameDiscovererTests {
 
 		@Test
 		void thisBindingOneCandidate() {
-			assertParameterNames(getMethod("oneObject"), "this(x)", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "this(x)", "x");
 		}
 
 		@Test
 		void thisBindingWithAlternateTokenizations() {
-			assertParameterNames(getMethod("oneObject"), "this( x )", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "this( x )", "x");
-			assertParameterNames(getMethod("oneObject"), "this( x)", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "this( x)", "x");
-			assertParameterNames(getMethod("oneObject"), "this (x )", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "this (x )", "x");
-			assertParameterNames(getMethod("oneObject"), "this(x )", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "this(x )", "x");
-			assertParameterNames(getMethod("oneObject"), "foo() && this(x)", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "foo() && this(x)", "x");
 		}
 
 		@Test
 		void thisBindingTwoCandidates() {
 			assertException(getMethod("oneObject"), "this(x) || this(y)", AmbiguousBindingException.class,
-					"Found 2 candidate this(), target() or args() variables but only one unbound argument slot");
+					"Found 2 candidate this(), target(), or args() variables but only one unbound argument slot");
 		}
 
 		@Test
@@ -131,22 +130,22 @@ class AspectJAdviceParameterNameDiscovererTests {
 
 		@Test
 		void targetBindingOneCandidate() {
-			assertParameterNames(getMethod("oneObject"), "target(x)", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "target(x)", "x");
 		}
 
 		@Test
 		void targetBindingWithAlternateTokenizations() {
-			assertParameterNames(getMethod("oneObject"), "target( x )", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "target( x )", "x");
-			assertParameterNames(getMethod("oneObject"), "target( x)", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "target( x)", "x");
-			assertParameterNames(getMethod("oneObject"), "target (x )", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "target (x )", "x");
-			assertParameterNames(getMethod("oneObject"), "target(x )", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "target(x )", "x");
-			assertParameterNames(getMethod("oneObject"), "foo() && target(x)", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "foo() && target(x)", "x");
 		}
 
 		@Test
 		void targetBindingTwoCandidates() {
 			assertException(getMethod("oneObject"), "target(x) || target(y)", AmbiguousBindingException.class,
-					"Found 2 candidate this(), target() or args() variables but only one unbound argument slot");
+					"Found 2 candidate this(), target(), or args() variables but only one unbound argument slot");
 		}
 
 		@Test
@@ -159,24 +158,24 @@ class AspectJAdviceParameterNameDiscovererTests {
 
 		@Test
 		void argsBindingOneObject() {
-			assertParameterNames(getMethod("oneObject"), "args(x)", new String[] {"x"});
+			assertParameterNames(getMethod("oneObject"), "args(x)", "x");
 		}
 
 		@Test
 		void argsBindingOneObjectTwoCandidates() {
 			assertException(getMethod("oneObject"), "args(x,y)", AmbiguousBindingException.class,
-					"Found 2 candidate this(), target() or args() variables but only one unbound argument slot");
+					"Found 2 candidate this(), target(), or args() variables but only one unbound argument slot");
 		}
 
 		@Test
 		void ambiguousArgsBinding() {
 			assertException(getMethod("twoObjects"), "args(x,y)", AmbiguousBindingException.class,
-					"Still 2 unbound args at this(),target(),args() binding stage, with no way to determine between them");
+					"Still 2 unbound args at this()/target()/args() binding stage, with no way to determine between them");
 		}
 
 		@Test
 		void argsOnePrimitive() {
-			assertParameterNames(getMethod("onePrimitive"), "args(count)", new String[] {"count"});
+			assertParameterNames(getMethod("onePrimitive"), "args(count)", "count");
 		}
 
 		@Test
@@ -188,37 +187,37 @@ class AspectJAdviceParameterNameDiscovererTests {
 		@Test
 		void thisAndPrimitive() {
 			assertParameterNames(getMethod("oneObjectOnePrimitive"), "args(count) && this(obj)",
-					new String[] {"obj", "count"});
+					"obj", "count");
 		}
 
 		@Test
 		void targetAndPrimitive() {
 			assertParameterNames(getMethod("oneObjectOnePrimitive"), "args(count) && target(obj)",
-					new String[] {"obj", "count"});
+					"obj", "count");
 		}
 
 		@Test
 		void throwingAndPrimitive() {
-			assertParameterNames(getMethod("oneThrowableOnePrimitive"), "args(count)", null, "ex",
+			assertParameterNamesExtended(getMethod("oneThrowableOnePrimitive"), "args(count)", null, "ex",
-					new String[] {"ex", "count"});
+					"ex", "count");
 		}
 
 		@Test
 		void allTogetherNow() {
-			assertParameterNames(getMethod("theBigOne"), "this(foo) && args(x)", null, "ex",
+			assertParameterNamesExtended(getMethod("theBigOne"), "this(foo) && args(x)", null, "ex",
-					new String[] {"thisJoinPoint", "ex", "x", "foo"});
+					"thisJoinPoint", "ex", "x", "foo");
 		}
 
 		@Test
 		void referenceBinding() {
-			assertParameterNames(getMethod("onePrimitive"),"somepc(foo)", new String[] {"foo"});
+			assertParameterNames(getMethod("onePrimitive"),"somepc(foo)", "foo");
 		}
 
 		@Test
 		void referenceBindingWithAlternateTokenizations() {
-			assertParameterNames(getMethod("onePrimitive"),"call(bar *) && somepc(foo)", new String[] {"foo"});
+			assertParameterNames(getMethod("onePrimitive"),"call(bar *) && somepc(foo)", "foo");
-			assertParameterNames(getMethod("onePrimitive"),"somepc ( foo )", new String[] {"foo"});
+			assertParameterNames(getMethod("onePrimitive"),"somepc ( foo )", "foo");
-			assertParameterNames(getMethod("onePrimitive"),"somepc( foo)", new String[] {"foo"});
+			assertParameterNames(getMethod("onePrimitive"),"somepc( foo)", "foo");
 		}
 	}
 
@@ -230,38 +229,38 @@ class AspectJAdviceParameterNameDiscovererTests {
 
 		@Test
 		void atThis() {
-			assertParameterNames(getMethod("oneAnnotation"),"@this(a)", new String[] {"a"});
+			assertParameterNames(getMethod("oneAnnotation"),"@this(a)", "a");
 		}
 
 		@Test
 		void atTarget() {
-			assertParameterNames(getMethod("oneAnnotation"),"@target(a)", new String[] {"a"});
+			assertParameterNames(getMethod("oneAnnotation"),"@target(a)", "a");
 		}
 
 		@Test
 		void atArgs() {
-			assertParameterNames(getMethod("oneAnnotation"),"@args(a)", new String[] {"a"});
+			assertParameterNames(getMethod("oneAnnotation"),"@args(a)", "a");
 		}
 
 		@Test
 		void atWithin() {
-			assertParameterNames(getMethod("oneAnnotation"),"@within(a)", new String[] {"a"});
+			assertParameterNames(getMethod("oneAnnotation"),"@within(a)", "a");
 		}
 
 		@Test
 		void atWithincode() {
-			assertParameterNames(getMethod("oneAnnotation"),"@withincode(a)", new String[] {"a"});
+			assertParameterNames(getMethod("oneAnnotation"),"@withincode(a)", "a");
 		}
 
 		@Test
 		void atAnnotation() {
-			assertParameterNames(getMethod("oneAnnotation"),"@annotation(a)", new String[] {"a"});
+			assertParameterNames(getMethod("oneAnnotation"),"@annotation(a)", "a");
 		}
 
 		@Test
 		void ambiguousAnnotationTwoVars() {
 			assertException(getMethod("twoAnnotations"),"@annotation(a) && @this(x)", AmbiguousBindingException.class,
-					"Found 2 potential annotation variable(s), and 2 potential argument slots");
+					"Found 2 potential annotation variable(s) and 2 potential argument slots");
 		}
 
 		@Test
@@ -272,15 +271,14 @@ class AspectJAdviceParameterNameDiscovererTests {
 
 		@Test
 		void annotationMedley() {
-			assertParameterNames(getMethod("annotationMedley"),"@annotation(a) && args(count) && this(foo)",
+			assertParameterNamesExtended(getMethod("annotationMedley"),"@annotation(a) && args(count) && this(foo)",
-					null, "ex", new String[] {"ex", "foo", "count", "a"});
+					null, "ex", "ex", "foo", "count", "a");
 		}
 
 		@Test
 		void annotationBinding() {
 			assertParameterNames(getMethod("pjpAndAnAnnotation"),
-					"execution(* *(..)) && @annotation(ann)",
+					"execution(* *(..)) && @annotation(ann)", "thisJoinPoint", "ann");
-					new String[] {"thisJoinPoint","ann"});
 		}
 
 	}
@@ -296,33 +294,23 @@ class AspectJAdviceParameterNameDiscovererTests {
 		throw new AssertionError("Bad test specification, no method '" + name + "' found in test class");
 	}
 
-	private void assertParameterNames(Method method, String pointcut, String[] parameterNames) {
+	private void assertParameterNames(Method method, String pointcut, String... parameterNames) {
-		assertParameterNames(method, pointcut, null, null, parameterNames);
+		assertParameterNamesExtended(method, pointcut, null, null, parameterNames);
 	}
 
-	private void assertParameterNames(
+	private void assertParameterNamesExtended(
-			Method method, String pointcut, String returning, String throwing, String[] parameterNames) {
+			Method method, String pointcut, String returning, String throwing, String... parameterNames) {
 
-		assertThat(parameterNames.length).as("bad test specification, must have same number of parameter names as method arguments").isEqualTo(method.getParameterCount());
+		assertThat(parameterNames)
+			.as("bad test specification, must have same number of parameter names as method arguments")
+			.hasSize(method.getParameterCount());
 
 		AspectJAdviceParameterNameDiscoverer discoverer = new AspectJAdviceParameterNameDiscoverer(pointcut);
 		discoverer.setRaiseExceptions(true);
 		discoverer.setReturningName(returning);
 		discoverer.setThrowingName(throwing);
-		String[] discoveredNames = discoverer.getParameterNames(method);
 
-		String formattedExpectedNames = Arrays.toString(parameterNames);
+		assertThat(discoverer.getParameterNames(method)).isEqualTo(parameterNames);
-		String formattedActualNames = Arrays.toString(discoveredNames);
-
-		assertThat(discoveredNames.length).as("Expecting " + parameterNames.length + " parameter names in return set '" +
-				formattedExpectedNames + "', but found " + discoveredNames.length +
-				" '" + formattedActualNames + "'").isEqualTo(parameterNames.length);
-
-		for (int i = 0; i < discoveredNames.length; i++) {
-			assertThat(discoveredNames[i]).as("Parameter names must never be null").isNotNull();
-			assertThat(discoveredNames[i]).as("Expecting parameter " + i + " to be named '" +
-						parameterNames[i] + "' but was '" + discoveredNames[i] + "'").isEqualTo(parameterNames[i]);
-		}
 	}
 
 	private void assertException(Method method, String pointcut, Class<? extends Throwable> exceptionType, String message) {

spring-aop/src/test/java/org/springframework/aop/aspectj/annotation/ArgumentBindingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -38,56 +38,55 @@ import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
  * @author Adrian Colyer
  * @author Juergen Hoeller
  * @author Chris Beams
+ * @author Sam Brannen
  */
-public class ArgumentBindingTests {
+class ArgumentBindingTests {
 
 	@Test
-	public void testBindingInPointcutUsedByAdvice() {
+	void bindingInPointcutUsedByAdvice() {
-		TestBean tb = new TestBean();
+		AspectJProxyFactory proxyFactory = new AspectJProxyFactory(new TestBean());
-		AspectJProxyFactory proxyFactory = new AspectJProxyFactory(tb);
 		proxyFactory.addAspect(NamedPointcutWithArgs.class);
 
 		ITestBean proxiedTestBean = proxyFactory.getProxy();
-		assertThatIllegalArgumentException().isThrownBy(() ->
+		assertThatIllegalArgumentException()
-				proxiedTestBean.setName("Supercalifragalisticexpialidocious"));
+			.isThrownBy(() -> proxiedTestBean.setName("enigma"))
+			.withMessage("enigma");
 	}
 
 	@Test
-	public void testAnnotationArgumentNameBinding() {
+	void annotationArgumentNameBinding() {
-		TransactionalBean tb = new TransactionalBean();
+		AspectJProxyFactory proxyFactory = new AspectJProxyFactory(new TransactionalBean());
-		AspectJProxyFactory proxyFactory = new AspectJProxyFactory(tb);
 		proxyFactory.addAspect(PointcutWithAnnotationArgument.class);
 
 		ITransactionalBean proxiedTestBean = proxyFactory.getProxy();
-		assertThatIllegalStateException().isThrownBy(
+		assertThatIllegalStateException()
-				proxiedTestBean::doInTransaction);
+			.isThrownBy(proxiedTestBean::doInTransaction)
+			.withMessage("Invoked with @Transactional");
 	}
 
 	@Test
-	public void testParameterNameDiscoverWithReferencePointcut() throws Exception {
+	void parameterNameDiscoverWithReferencePointcut() throws Exception {
 		AspectJAdviceParameterNameDiscoverer discoverer =
 				new AspectJAdviceParameterNameDiscoverer("somepc(formal) && set(* *)");
 		discoverer.setRaiseExceptions(true);
-		Method methodUsedForParameterTypeDiscovery =
+		Method method = getClass().getDeclaredMethod("methodWithOneParam", String.class);
-				getClass().getMethod("methodWithOneParam", String.class);
+		assertThat(discoverer.getParameterNames(method)).containsExactly("formal");
-		String[] pnames = discoverer.getParameterNames(methodUsedForParameterTypeDiscovery);
-		assertThat(pnames.length).as("one parameter name").isEqualTo(1);
-		assertThat(pnames[0]).isEqualTo("formal");
 	}
 
 
-	public void methodWithOneParam(String aParam) {
+	@SuppressWarnings("unused")
+	private void methodWithOneParam(String aParam) {
 	}
 
 
-	public interface ITransactionalBean {
+	interface ITransactionalBean {
 
 		@Transactional
 		void doInTransaction();
 	}
 
 
-	public static class TransactionalBean implements ITransactionalBean {
+	static class TransactionalBean implements ITransactionalBean {
 
 		@Override
 		@Transactional
@@ -95,38 +94,35 @@ public class ArgumentBindingTests {
 		}
 	}
 
-}
-
 	/**
- * Represents Spring's Transactional annotation without actually introducing the dependency
+	 * Mimics Spring's @Transactional annotation without actually introducing the dependency.
 	 */
 	@Retention(RetentionPolicy.RUNTIME)
 	@interface Transactional {
 	}
 
-
 	@Aspect
-class PointcutWithAnnotationArgument {
+	static class PointcutWithAnnotationArgument {
 
-	@Around(value = "execution(* org.springframework..*.*(..)) && @annotation(transaction)")
+		@Around(value = "execution(* org.springframework..*.*(..)) && @annotation(transactional)")
-	public Object around(ProceedingJoinPoint pjp, Transactional transaction) throws Throwable {
+		public Object around(ProceedingJoinPoint pjp, Transactional transactional) throws Throwable {
-		System.out.println("Invoked with transaction " + transaction);
+			throw new IllegalStateException("Invoked with @Transactional");
-		throw new IllegalStateException();
 		}
 
 	}
 
-
 	@Aspect
-class NamedPointcutWithArgs {
+	static class NamedPointcutWithArgs {
 
 		@Pointcut("execution(* *(..)) && args(s,..)")
 		public void pointcutWithArgs(String s) {}
 
 		@Around("pointcutWithArgs(aString)")
 		public Object doAround(ProceedingJoinPoint pjp, String aString) throws Throwable {
-		System.out.println("got '" + aString + "' at '" + pjp + "'");
 			throw new IllegalArgumentException(aString);
 		}
 
 	}
+
+}
+

spring-context/src/main/java/org/springframework/context/event/SimpleApplicationEventMulticaster.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -132,7 +132,7 @@ public class SimpleApplicationEventMulticaster extends AbstractApplicationEventM
 	}
 
 	@Override
-	public void multicastEvent(final ApplicationEvent event, @Nullable ResolvableType eventType) {
+	public void multicastEvent(ApplicationEvent event, @Nullable ResolvableType eventType) {
 		ResolvableType type = (eventType != null ? eventType : resolveDefaultEventType(event));
 		Executor executor = getTaskExecutor();
 		for (ApplicationListener<?> listener : getApplicationListeners(event, type)) {

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -762,7 +762,7 @@ public class ResolvableType implements Serializable {
 
 	/**
 	 * Convenience method that will {@link #getGeneric(int...) get} and
-	 * {@link #resolve() resolve} a specific generic parameters.
+	 * {@link #resolve() resolve} a specific generic parameter.
 	 * @param indexes the indexes that refer to the generic parameter
 	 * (may be omitted to return the first generic)
 	 * @return a resolved {@link Class} or {@code null}

spring-core/src/main/java/org/springframework/core/log/LogMessage.java

@@ -22,10 +22,10 @@ import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 
 /**
- * A simple log message type for use with Commons Logging, allowing
+ * A simple log message type for use with Commons Logging, allowing for convenient
- * for convenient lazy resolution of a given {@link Supplier} instance
+ * lazy resolution of a given {@link Supplier} instance (typically bound to a lambda
- * (typically bound to a Java 8 lambda expression) or a printf-style
+ * expression) or a printf-style format string ({@link String#format}) in its
- * format string ({@link String#format}) in its {@link #toString()}.
+ * {@link #toString()}.
  *
  * @author Juergen Hoeller
  * @author Sebastien Deleuze
@@ -78,7 +78,7 @@ public abstract class LogMessage implements CharSequence {
 
 	/**
 	 * Build a lazily resolving message from the given supplier.
-	 * @param supplier the supplier (typically bound to a Java 8 lambda expression)
+	 * @param supplier the supplier (typically bound to a lambda expression)
 	 * @see #toString()
 	 */
 	public static LogMessage of(Supplier<? extends CharSequence> supplier) {
@@ -134,8 +134,12 @@ public abstract class LogMessage implements CharSequence {
 
 	/**
 	 * Build a lazily formatted message from the given format string and varargs.
+	 * <p>This varargs {@code format()} variant may be costly. You should therefore
+	 * use the individual argument variants whenever possible;
+	 * {@link #format(String, Object)}, {@link #format(String, Object, Object)}, etc.
 	 * @param format the format string (following {@link String#format} rules)
-	 * @param args the varargs array (can be {@code null}, costly, prefer individual arguments)
+	 * @param args the varargs array (can be {@code null} and can contain {@code null}
+	 * elements)
 	 * @see String#format(String, Object...)
 	 */
 	public static LogMessage format(String format, @Nullable Object... args) {