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The AspectJ weaver introduces advices to java classes
/* *******************************************************************
* Copyright (c) 2004 IBM Corporation.
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v1.0
* which accompanies this distribution and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* ******************************************************************/
package org.aspectj.weaver.internal.tools;
import java.lang.reflect.Constructor;
import java.lang.reflect.Member;
import org.aspectj.weaver.ResolvedMember;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.Shadow;
import org.aspectj.weaver.World;
import org.aspectj.weaver.ast.Literal;
import org.aspectj.weaver.ast.Test;
import org.aspectj.weaver.patterns.AbstractPatternNodeVisitor;
import org.aspectj.weaver.patterns.AnnotationPointcut;
import org.aspectj.weaver.patterns.ArgsAnnotationPointcut;
import org.aspectj.weaver.patterns.ArgsPointcut;
import org.aspectj.weaver.patterns.CflowPointcut;
import org.aspectj.weaver.patterns.ExposedState;
import org.aspectj.weaver.patterns.IfPointcut;
import org.aspectj.weaver.patterns.NotAnnotationTypePattern;
import org.aspectj.weaver.patterns.NotPointcut;
import org.aspectj.weaver.patterns.Pointcut;
import org.aspectj.weaver.patterns.ThisOrTargetAnnotationPointcut;
import org.aspectj.weaver.patterns.ThisOrTargetPointcut;
import org.aspectj.weaver.patterns.WithinAnnotationPointcut;
import org.aspectj.weaver.patterns.WithinCodeAnnotationPointcut;
import org.aspectj.weaver.reflect.ReflectionFastMatchInfo;
import org.aspectj.weaver.reflect.StandardShadow;
import org.aspectj.weaver.reflect.StandardShadowMatchImpl;
import org.aspectj.weaver.tools.DefaultMatchingContext;
import org.aspectj.weaver.tools.MatchingContext;
import org.aspectj.weaver.tools.PointcutParameter;
import org.aspectj.weaver.tools.ShadowMatch;
import org.aspectj.weaver.tools.StandardPointcutExpression;
/**
* Map from weaver.tools interface to internal Pointcut implementation...
*/
public class StandardPointcutExpressionImpl implements StandardPointcutExpression {
private World world;
private Pointcut pointcut;
private String expression;
private PointcutParameter[] parameters;
private MatchingContext matchContext = new DefaultMatchingContext();
public StandardPointcutExpressionImpl(Pointcut pointcut, String expression, PointcutParameter[] params, World inWorld) {
this.pointcut = pointcut;
this.expression = expression;
this.world = inWorld;
this.parameters = params;
if (this.parameters == null) {
this.parameters = new PointcutParameter[0];
}
}
public Pointcut getUnderlyingPointcut() {
return this.pointcut;
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.tools.PointcutExpression#setMatchingContext(org.aspectj.weaver.tools.MatchingContext)
*/
public void setMatchingContext(MatchingContext aMatchContext) {
this.matchContext = aMatchContext;
}
public boolean couldMatchJoinPointsInType(Class aClass) {
ResolvedType matchType = world.resolve(aClass.getName());
ReflectionFastMatchInfo info = new ReflectionFastMatchInfo(matchType, null, this.matchContext, world);
return pointcut.fastMatch(info).maybeTrue();
}
public boolean mayNeedDynamicTest() {
HasPossibleDynamicContentVisitor visitor = new HasPossibleDynamicContentVisitor();
pointcut.traverse(visitor, null);
return visitor.hasDynamicContent();
}
private ExposedState getExposedState() {
return new ExposedState(parameters.length);
}
// public ShadowMatch matchesMethodExecution(Method aMethod) {
// return matchesExecution(aMethod);
// }
public ShadowMatch matchesMethodExecution(ResolvedMember aMethod) {
return matchesExecution(aMethod);
}
public ShadowMatch matchesConstructorExecution(Constructor aConstructor) {
return null;
// return matchesExecution(aConstructor);
}
// private ShadowMatch matchesExecution(Member aMember) {
// Shadow s = ReflectionShadow.makeExecutionShadow(world, aMember, this.matchContext);
// ShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aMember);
// sm.setWithinCode(null);
// sm.setWithinType(aMember.getDeclaringClass());
// return sm;
// }
private ShadowMatch matchesExecution(ResolvedMember aMember) {
Shadow s = StandardShadow.makeExecutionShadow(world, aMember, this.matchContext);
StandardShadowMatchImpl sm = getShadowMatch(s);
sm.setSubject(aMember);
sm.setWithinCode(null);
sm.setWithinType((ResolvedType) aMember.getDeclaringType());
return sm;
}
// public ShadowMatch matchesStaticInitialization(Class aClass) {
// Shadow s = ReflectionShadow.makeStaticInitializationShadow(world, aClass, this.matchContext);
// StandardShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(null);
// sm.setWithinCode(null);
// sm.setWithinType(aClass);
// return sm;
// }
public ShadowMatch matchesStaticInitialization(ResolvedType aType) {
Shadow s = StandardShadow.makeStaticInitializationShadow(world, aType, this.matchContext);
StandardShadowMatchImpl sm = getShadowMatch(s);
sm.setSubject(null);
sm.setWithinCode(null);
sm.setWithinType(aType);
return sm;
}
// public ShadowMatch matchesAdviceExecution(Method aMethod) {
// Shadow s = ReflectionShadow.makeAdviceExecutionShadow(world, aMethod, this.matchContext);
// StandardShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aMethod);
// sm.setWithinCode(null);
// sm.setWithinType(aMethod.getDeclaringClass());
// return sm;
// }
//
// public ShadowMatch matchesInitialization(Constructor aConstructor) {
// Shadow s = ReflectionShadow.makeInitializationShadow(world, aConstructor, this.matchContext);
// StandardShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aConstructor);
// sm.setWithinCode(null);
// sm.setWithinType(aConstructor.getDeclaringClass());
// return sm;
// }
//
// public ShadowMatch matchesPreInitialization(Constructor aConstructor) {
// Shadow s = ReflectionShadow.makePreInitializationShadow(world, aConstructor, this.matchContext);
// StandardShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aConstructor);
// sm.setWithinCode(null);
// sm.setWithinType(aConstructor.getDeclaringClass());
// return sm;
// }
//
public ShadowMatch matchesMethodCall(ResolvedMember aMethod, ResolvedMember withinCode) {
Shadow s = StandardShadow.makeCallShadow(world, aMethod, withinCode, this.matchContext);
StandardShadowMatchImpl sm = getShadowMatch(s);
sm.setSubject(aMethod);
sm.setWithinCode(withinCode);
sm.setWithinType((ResolvedType) withinCode.getDeclaringType());
return sm;
}
//
// public ShadowMatch matchesMethodCall(Method aMethod, Class callerType) {
// Shadow s = ReflectionShadow.makeCallShadow(world, aMethod, callerType, this.matchContext);
// ShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aMethod);
// sm.setWithinCode(null);
// sm.setWithinType(callerType);
// return sm;
// }
//
// public ShadowMatch matchesConstructorCall(Constructor aConstructor, Class callerType) {
// Shadow s = ReflectionShadow.makeCallShadow(world, aConstructor, callerType, this.matchContext);
// ShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aConstructor);
// sm.setWithinCode(null);
// sm.setWithinType(callerType);
// return sm;
// }
//
// public ShadowMatch matchesConstructorCall(Constructor aConstructor, Member withinCode) {
// Shadow s = ReflectionShadow.makeCallShadow(world, aConstructor, withinCode, this.matchContext);
// ShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aConstructor);
// sm.setWithinCode(withinCode);
// sm.setWithinType(withinCode.getDeclaringClass());
// return sm;
// }
//
// public ShadowMatch matchesHandler(Class exceptionType, Class handlingType) {
// Shadow s = ReflectionShadow.makeHandlerShadow(world, exceptionType, handlingType, this.matchContext);
// ShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(null);
// sm.setWithinCode(null);
// sm.setWithinType(handlingType);
// return sm;
// }
//
// public ShadowMatch matchesHandler(Class exceptionType, Member withinCode) {
// Shadow s = ReflectionShadow.makeHandlerShadow(world, exceptionType, withinCode, this.matchContext);
// ShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(null);
// sm.setWithinCode(withinCode);
// sm.setWithinType(withinCode.getDeclaringClass());
// return sm;
// }
//
// public ShadowMatch matchesFieldGet(Field aField, Class withinType) {
// Shadow s = ReflectionShadow.makeFieldGetShadow(world, aField, withinType, this.matchContext);
// ShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aField);
// sm.setWithinCode(null);
// sm.setWithinType(withinType);
// return sm;
// }
//
// public ShadowMatch matchesFieldGet(Field aField, Member withinCode) {
// Shadow s = ReflectionShadow.makeFieldGetShadow(world, aField, withinCode, this.matchContext);
// ShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aField);
// sm.setWithinCode(withinCode);
// sm.setWithinType(withinCode.getDeclaringClass());
// return sm;
// }
//
// public ShadowMatch matchesFieldSet(Field aField, Class withinType) {
// Shadow s = ReflectionShadow.makeFieldSetShadow(world, aField, withinType, this.matchContext);
// ShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aField);
// sm.setWithinCode(null);
// sm.setWithinType(withinType);
// return sm;
// }
//
// public ShadowMatch matchesFieldSet(Field aField, Member withinCode) {
// Shadow s = ReflectionShadow.makeFieldSetShadow(world, aField, withinCode, this.matchContext);
// StandardShadowMatchImpl sm = getShadowMatch(s);
// sm.setSubject(aField);
// sm.setWithinCode(withinCode);
// sm.setWithinType(withinCode.getDeclaringClass());
// return sm;
// }
private StandardShadowMatchImpl getShadowMatch(Shadow forShadow) {
org.aspectj.util.FuzzyBoolean match = pointcut.match(forShadow);
Test residueTest = Literal.TRUE;
ExposedState state = getExposedState();
if (match.maybeTrue()) {
residueTest = pointcut.findResidue(forShadow, state);
}
StandardShadowMatchImpl sm = new StandardShadowMatchImpl(match, residueTest, state, parameters);
sm.setMatchingContext(this.matchContext);
return sm;
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.tools.PointcutExpression#getPointcutExpression()
*/
public String getPointcutExpression() {
return expression;
}
private static class HasPossibleDynamicContentVisitor extends AbstractPatternNodeVisitor {
private boolean hasDynamicContent = false;
public boolean hasDynamicContent() {
return hasDynamicContent;
}
@Override
public Object visit(WithinAnnotationPointcut node, Object data) {
hasDynamicContent = true;
return null;
}
@Override
public Object visit(WithinCodeAnnotationPointcut node, Object data) {
hasDynamicContent = true;
return null;
}
@Override
public Object visit(AnnotationPointcut node, Object data) {
hasDynamicContent = true;
return null;
}
@Override
public Object visit(ArgsAnnotationPointcut node, Object data) {
hasDynamicContent = true;
return null;
}
@Override
public Object visit(ArgsPointcut node, Object data) {
hasDynamicContent = true;
return null;
}
@Override
public Object visit(CflowPointcut node, Object data) {
hasDynamicContent = true;
return null;
}
@Override
public Object visit(IfPointcut node, Object data) {
hasDynamicContent = true;
return null;
}
@Override
public Object visit(NotAnnotationTypePattern node, Object data) {
return node.getNegatedPattern().accept(this, data);
}
@Override
public Object visit(NotPointcut node, Object data) {
return node.getNegatedPointcut().accept(this, data);
}
@Override
public Object visit(ThisOrTargetAnnotationPointcut node, Object data) {
hasDynamicContent = true;
return null;
}
@Override
public Object visit(ThisOrTargetPointcut node, Object data) {
hasDynamicContent = true;
return null;
}
}
public static class Handler implements Member {
private Class decClass;
private Class exType;
public Handler(Class decClass, Class exType) {
this.decClass = decClass;
this.exType = exType;
}
public int getModifiers() {
return 0;
}
public Class getDeclaringClass() {
return decClass;
}
public String getName() {
return null;
}
public Class getHandledExceptionType() {
return exType;
}
public boolean isSynthetic() {
return false;
}
}
}