org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint Maven / Gradle / Ivy
/*
* Copyright 2002-2007 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 org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.reflect.MethodSignature;
import org.aspectj.lang.reflect.SourceLocation;
import org.aspectj.runtime.internal.AroundClosure;
import org.springframework.aop.ProxyMethodInvocation;
import org.springframework.util.Assert;
/**
* Implementation of AspectJ ProceedingJoinPoint interface
* wrapping an AOP Alliance MethodInvocation.
*
* Note: the getThis() method returns the current Spring AOP proxy.
* The getTarget() method returns the current Spring AOP target (which may be
* null if there is no target), and is a plain POJO without any advice.
* If you want to call the object and have the advice take effect, use
* getThis(). A common example is casting the object to an
* introduced interface in the implementation of an introduction.
*
*
Of course there is no such distinction between target and proxy in AspectJ.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @author Adrian Colyer
* @since 2.0
*/
public class MethodInvocationProceedingJoinPoint implements ProceedingJoinPoint, JoinPoint.StaticPart {
private final ProxyMethodInvocation methodInvocation;
private Object[] defensiveCopyOfArgs;
/** Lazily initialized signature object */
private Signature signature;
/** Lazily initialized source location object */
private SourceLocation sourceLocation;
/**
* Create a new MethodInvocationProceedingJoinPoint, wrapping the given
* Spring ProxyMethodInvocation object.
* @param methodInvocation the Spring ProxyMethodInvocation object
*/
public MethodInvocationProceedingJoinPoint(ProxyMethodInvocation methodInvocation) {
Assert.notNull(methodInvocation, "MethodInvocation must not be null");
this.methodInvocation = methodInvocation;
}
public void set$AroundClosure(AroundClosure aroundClosure) {
throw new UnsupportedOperationException();
}
public Object proceed() throws Throwable {
return this.methodInvocation.invocableClone().proceed();
}
public Object proceed(Object[] arguments) throws Throwable {
Assert.notNull(arguments, "Argument array passed to proceed cannot be null");
if (arguments.length != this.methodInvocation.getArguments().length) {
throw new IllegalArgumentException("Expecting " +
this.methodInvocation.getArguments().length + " arguments to proceed, " +
"but was passed " + arguments.length + " arguments");
}
this.methodInvocation.setArguments(arguments);
return this.methodInvocation.invocableClone(arguments).proceed();
}
/**
* Returns the Spring AOP proxy. Cannot be null.
*/
public Object getThis() {
return this.methodInvocation.getProxy();
}
/**
* Returns the Spring AOP target. May be null if there is no target.
*/
public Object getTarget() {
return this.methodInvocation.getThis();
}
public Object[] getArgs() {
if (this.defensiveCopyOfArgs == null) {
Object[] argsSource = this.methodInvocation.getArguments();
this.defensiveCopyOfArgs = new Object[argsSource.length];
System.arraycopy(argsSource, 0, this.defensiveCopyOfArgs, 0, argsSource.length);
}
return this.defensiveCopyOfArgs;
}
public Signature getSignature() {
if (this.signature == null) {
this.signature = new MethodSignatureImpl();
}
return signature;
}
public SourceLocation getSourceLocation() {
if (this.sourceLocation == null) {
this.sourceLocation = new SourceLocationImpl();
}
return this.sourceLocation;
}
public String getKind() {
return ProceedingJoinPoint.METHOD_EXECUTION;
}
public JoinPoint.StaticPart getStaticPart() {
return this;
}
public String toShortString() {
return "execution(" + this.methodInvocation.getMethod().getName() + ")";
}
public String toLongString() {
return getClass().getName() + ": execution: [" + this.methodInvocation + "]";
}
public String toString() {
return getClass().getName() + ": " + toShortString();
}
/**
* Lazily initialized MethodSignature.
*/
private class MethodSignatureImpl implements Signature, MethodSignature {
public String toShortString() {
return methodInvocation.getMethod().getName();
}
public String toLongString() {
return methodInvocation.getMethod().toString();
}
public String getName() {
return methodInvocation.getMethod().getName();
}
public int getModifiers() {
return methodInvocation.getMethod().getModifiers();
}
public Class getDeclaringType() {
return methodInvocation.getMethod().getDeclaringClass();
}
public String getDeclaringTypeName() {
return methodInvocation.getMethod().getDeclaringClass().getName();
}
public Class getReturnType() {
return methodInvocation.getMethod().getReturnType();
}
public Method getMethod() {
return methodInvocation.getMethod();
}
public Class[] getParameterTypes() {
return methodInvocation.getMethod().getParameterTypes();
}
public String[] getParameterNames() {
// TODO consider allowing use of ParameterNameDiscoverer, or tying into
// parameter names exposed for argument binding...
throw new UnsupportedOperationException(
"Parameter names cannot be determined unless compiled by AspectJ compiler");
}
public Class[] getExceptionTypes() {
return methodInvocation.getMethod().getExceptionTypes();
}
}
/**
* Lazily initialized SourceLocation.
*/
private class SourceLocationImpl implements SourceLocation {
public Class getWithinType() {
if (methodInvocation.getThis() == null) {
throw new UnsupportedOperationException("No source location joinpoint available: target is null");
}
return methodInvocation.getThis().getClass();
}
public String getFileName() {
throw new UnsupportedOperationException();
}
public int getLine() {
throw new UnsupportedOperationException();
}
public int getColumn() {
throw new UnsupportedOperationException();
}
}
}