/*
* Copyright 2002-2010 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.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.aop.aspectj;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import org.springframework.aop.AfterAdvice;
import org.springframework.aop.AfterReturningAdvice;
import org.springframework.util.ClassUtils;
import org.springframework.util.TypeUtils;
/**
* Spring AOP advice wrapping an AspectJ after-returning advice method.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @author Ramnivas Laddad
* @since 2.0
*/
public class AspectJAfterReturningAdvice extends AbstractAspectJAdvice implements AfterReturningAdvice, AfterAdvice {
public AspectJAfterReturningAdvice(
Method aspectJBeforeAdviceMethod, AspectJExpressionPointcut pointcut, AspectInstanceFactory aif) {
super(aspectJBeforeAdviceMethod, pointcut, aif);
}
public boolean isBeforeAdvice() {
return false;
}
public boolean isAfterAdvice() {
return true;
}
@Override
public void setReturningName(String name) {
setReturningNameNoCheck(name);
}
public void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable {
if (shouldInvokeOnReturnValueOf(method, returnValue)) {
invokeAdviceMethod(getJoinPointMatch(), returnValue, null);
}
}
/**
* Following AspectJ semantics, if a returning clause was specified, then the
* advice is only invoked if the returned value is an instance of the given
* returning type and generic type parameters, if any, match the assignment
* rules. If the returning type is Object, the advice is *always* invoked.
* @param returnValue the return value of the target method
* @return whether to invoke the advice method for the given return value
*/
private boolean shouldInvokeOnReturnValueOf(Method method, Object returnValue) {
Class type = getDiscoveredReturningType();
Type genericType = getDiscoveredReturningGenericType();
// If we aren't dealing with a raw type, check if generic parameters are assignable.
return (ClassUtils.isAssignableValue(type, returnValue) &&
(genericType == null || genericType == type ||
TypeUtils.isAssignable(genericType, method.getGenericReturnType())));
}
}
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