Apply minor polishing in spring-aop

Closes gh-28984

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

@@ -268,18 +268,16 @@ public abstract class AbstractAspectJAdvice implements Advice, AspectJPrecedence
 						this.argumentNames[i] + "' that is not a valid Java identifier");
 			}
 		}
-		if (this.argumentNames != null) {
-			if (this.aspectJAdviceMethod.getParameterCount() == this.argumentNames.length + 1) {
-				// May need to add implicit join point arg name...
-				Class<?> firstArgType = this.aspectJAdviceMethod.getParameterTypes()[0];
-				if (firstArgType == JoinPoint.class ||
-						firstArgType == ProceedingJoinPoint.class ||
-						firstArgType == JoinPoint.StaticPart.class) {
-					String[] oldNames = this.argumentNames;
-					this.argumentNames = new String[oldNames.length + 1];
-					this.argumentNames[0] = "THIS_JOIN_POINT";
-					System.arraycopy(oldNames, 0, this.argumentNames, 1, oldNames.length);
-				}
+		if (this.aspectJAdviceMethod.getParameterCount() == this.argumentNames.length + 1) {
+			// May need to add implicit join point arg name...
+			Class<?> firstArgType = this.aspectJAdviceMethod.getParameterTypes()[0];
+			if (firstArgType == JoinPoint.class ||
+					firstArgType == ProceedingJoinPoint.class ||
+					firstArgType == JoinPoint.StaticPart.class) {
+				String[] oldNames = this.argumentNames;
+				this.argumentNames = new String[oldNames.length + 1];
+				this.argumentNames[0] = "THIS_JOIN_POINT";
+				System.arraycopy(oldNames, 0, this.argumentNames, 1, oldNames.length);
 			}
 		}
 	}

spring-aop/src/main/java/org/springframework/aop/config/ConfigBeanDefinitionParser.java

@@ -108,14 +108,10 @@ class ConfigBeanDefinitionParser implements BeanDefinitionParser {
 		List<Element> childElts = DomUtils.getChildElements(element);
 		for (Element elt: childElts) {
 			String localName = parserContext.getDelegate().getLocalName(elt);
-			if (POINTCUT.equals(localName)) {
-				parsePointcut(elt, parserContext);
-			}
-			else if (ADVISOR.equals(localName)) {
-				parseAdvisor(elt, parserContext);
-			}
-			else if (ASPECT.equals(localName)) {
-				parseAspect(elt, parserContext);
+			switch (localName) {
+				case POINTCUT -> parsePointcut(elt, parserContext);
+				case ADVISOR -> parseAdvisor(elt, parserContext);
+				case ASPECT -> parseAspect(elt, parserContext);
 			}
 		}
 

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

@@ -257,23 +257,21 @@ public abstract class AopProxyUtils {
 		if (ObjectUtils.isEmpty(arguments)) {
 			return new Object[0];
 		}
-		if (method.isVarArgs()) {
-			if (method.getParameterCount() == arguments.length) {
-				Class<?>[] paramTypes = method.getParameterTypes();
-				int varargIndex = paramTypes.length - 1;
-				Class<?> varargType = paramTypes[varargIndex];
-				if (varargType.isArray()) {
-					Object varargArray = arguments[varargIndex];
-					if (varargArray instanceof Object[] && !varargType.isInstance(varargArray)) {
-						Object[] newArguments = new Object[arguments.length];
-						System.arraycopy(arguments, 0, newArguments, 0, varargIndex);
-						Class<?> targetElementType = varargType.getComponentType();
-						int varargLength = Array.getLength(varargArray);
-						Object newVarargArray = Array.newInstance(targetElementType, varargLength);
-						System.arraycopy(varargArray, 0, newVarargArray, 0, varargLength);
-						newArguments[varargIndex] = newVarargArray;
-						return newArguments;
-					}
+		if (method.isVarArgs() && (method.getParameterCount() == arguments.length)) {
+			Class<?>[] paramTypes = method.getParameterTypes();
+			int varargIndex = paramTypes.length - 1;
+			Class<?> varargType = paramTypes[varargIndex];
+			if (varargType.isArray()) {
+				Object varargArray = arguments[varargIndex];
+				if (varargArray instanceof Object[] && !varargType.isInstance(varargArray)) {
+					Object[] newArguments = new Object[arguments.length];
+					System.arraycopy(arguments, 0, newArguments, 0, varargIndex);
+					Class<?> targetElementType = varargType.getComponentType();
+					int varargLength = Array.getLength(varargArray);
+					Object newVarargArray = Array.newInstance(targetElementType, varargLength);
+					System.arraycopy(varargArray, 0, newVarargArray, 0, varargLength);
+					newArguments[varargIndex] = newVarargArray;
+					return newArguments;
 				}
 			}
 		}

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

@@ -251,11 +251,10 @@ class CglibAopProxy implements AopProxy, Serializable {
 	private void validateClassIfNecessary(Class<?> proxySuperClass, @Nullable ClassLoader proxyClassLoader) {
 		if (!this.advised.isOptimize() && logger.isInfoEnabled()) {
 			synchronized (validatedClasses) {
-				if (!validatedClasses.containsKey(proxySuperClass)) {
-					doValidateClass(proxySuperClass, proxyClassLoader,
-							ClassUtils.getAllInterfacesForClassAsSet(proxySuperClass));
-					validatedClasses.put(proxySuperClass, Boolean.TRUE);
-				}
+				validatedClasses.computeIfAbsent(proxySuperClass, clazz -> {
+					doValidateClass(clazz, proxyClassLoader, ClassUtils.getAllInterfacesForClassAsSet(clazz));
+					return Boolean.TRUE;
+				});
 			}
 		}
 	}
@@ -702,8 +701,7 @@ class CglibAopProxy implements AopProxy, Serializable {
 					// We need to create a method invocation...
 					retVal = new CglibMethodInvocation(proxy, target, method, args, targetClass, chain, methodProxy).proceed();
 				}
-				retVal = processReturnType(proxy, target, method, retVal);
-				return retVal;
+				return processReturnType(proxy, target, method, retVal);
 			}
 			finally {
 				if (target != null && !targetSource.isStatic()) {

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

@@ -109,10 +109,8 @@ public class DefaultAdvisorChainFactory implements AdvisorChainFactory, Serializ
 	 */
 	private static boolean hasMatchingIntroductions(Advisor[] advisors, Class<?> actualClass) {
 		for (Advisor advisor : advisors) {
-			if (advisor instanceof IntroductionAdvisor ia) {
-				if (ia.getClassFilter().matches(actualClass)) {
-					return true;
-				}
+			if (advisor instanceof IntroductionAdvisor ia && ia.getClassFilter().matches(actualClass)) {
+				return true;
 			}
 		}
 		return false;