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The AspectJ weaver introduces advices to java classes
/* *******************************************************************
* Copyright (c) 2005 Contributors.
* 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://eclipse.org/legal/epl-v10.html
*
* Contributors:
* Adrian Colyer Initial implementation
* ******************************************************************/
package org.aspectj.weaver.internal.tools;
import java.io.IOException;
import java.util.Map;
import org.aspectj.util.FuzzyBoolean;
import org.aspectj.weaver.CompressingDataOutputStream;
import org.aspectj.weaver.IntMap;
import org.aspectj.weaver.ReferenceType;
import org.aspectj.weaver.ReferenceTypeDelegate;
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.Bindings;
import org.aspectj.weaver.patterns.ExposedState;
import org.aspectj.weaver.patterns.FastMatchInfo;
import org.aspectj.weaver.patterns.IScope;
import org.aspectj.weaver.patterns.PatternNodeVisitor;
import org.aspectj.weaver.patterns.Pointcut;
import org.aspectj.weaver.reflect.ReflectionBasedReferenceTypeDelegate;
import org.aspectj.weaver.reflect.ReflectionFastMatchInfo;
import org.aspectj.weaver.reflect.ReflectionShadow;
import org.aspectj.weaver.reflect.ReflectionWorld;
import org.aspectj.weaver.tools.ContextBasedMatcher;
import org.aspectj.weaver.tools.MatchingContext;
/**
* Implementation of Pointcut that is backed by a user-extension pointcut designator handler.
*
*/
public class PointcutDesignatorHandlerBasedPointcut extends Pointcut {
private final ContextBasedMatcher matcher;
private final World world;
public PointcutDesignatorHandlerBasedPointcut(ContextBasedMatcher expr, World world) {
this.matcher = expr;
this.world = world;
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.Pointcut#getPointcutKind()
*/
public byte getPointcutKind() {
return Pointcut.USER_EXTENSION;
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.Pointcut#fastMatch(org.aspectj.weaver.patterns.FastMatchInfo)
*/
public FuzzyBoolean fastMatch(FastMatchInfo info) {
if (info instanceof ReflectionFastMatchInfo) {
// Really need a reflectionworld here...
if (!(world instanceof ReflectionWorld)) {
throw new IllegalStateException("Can only match user-extension pcds with a ReflectionWorld");
}
Class clazz = null;
try {
clazz = Class.forName(info.getType().getName(), false, ((ReflectionWorld) world).getClassLoader());
} catch (ClassNotFoundException cnfe) {
if (info.getType() instanceof ReferenceType) {
ReferenceTypeDelegate rtd = ((ReferenceType)info.getType()).getDelegate();
if (rtd instanceof ReflectionBasedReferenceTypeDelegate) {
clazz = ((ReflectionBasedReferenceTypeDelegate)rtd).getClazz();
}
}
}
if (clazz == null) {
return FuzzyBoolean.MAYBE;
}
return FuzzyBoolean.fromBoolean(this.matcher.couldMatchJoinPointsInType(clazz, ((ReflectionFastMatchInfo) info).getMatchingContext()));
}
throw new IllegalStateException("Can only match user-extension pcds against Reflection FastMatchInfo objects");
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.Pointcut#couldMatchKinds()
*/
public int couldMatchKinds() {
return Shadow.ALL_SHADOW_KINDS_BITS;
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.Pointcut#matchInternal(org.aspectj.weaver.Shadow)
*/
protected FuzzyBoolean matchInternal(Shadow shadow) {
if (shadow instanceof ReflectionShadow) {
MatchingContext context = ((ReflectionShadow) shadow).getMatchingContext();
org.aspectj.weaver.tools.FuzzyBoolean match = this.matcher.matchesStatically(context);
if (match == org.aspectj.weaver.tools.FuzzyBoolean.MAYBE) {
return FuzzyBoolean.MAYBE;
} else if (match == org.aspectj.weaver.tools.FuzzyBoolean.YES) {
return FuzzyBoolean.YES;
} else if (match == org.aspectj.weaver.tools.FuzzyBoolean.NO) {
return FuzzyBoolean.NO;
}
}
throw new IllegalStateException("Can only match user-extension pcds against Reflection shadows (not BCEL)");
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.Pointcut#resolveBindings(org.aspectj.weaver.patterns.IScope,
* org.aspectj.weaver.patterns.Bindings)
*/
protected void resolveBindings(IScope scope, Bindings bindings) {
// no-op
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.Pointcut#concretize1(org.aspectj.weaver.ResolvedType, org.aspectj.weaver.ResolvedType,
* org.aspectj.weaver.IntMap)
*/
protected Pointcut concretize1(ResolvedType inAspect, ResolvedType declaringType, IntMap bindings) {
return this;
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.Pointcut#findResidueInternal(org.aspectj.weaver.Shadow,
* org.aspectj.weaver.patterns.ExposedState)
*/
protected Test findResidueInternal(Shadow shadow, ExposedState state) {
if (!this.matcher.mayNeedDynamicTest()) {
return Literal.TRUE;
} else {
// could be more efficient here!
matchInternal(shadow);
return new MatchingContextBasedTest(this.matcher);
}
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.Pointcut#parameterizeWith(java.util.Map)
*/
public Pointcut parameterizeWith(Map typeVariableMap, World w) {
return this;
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.PatternNode#write(java.io.DataOutputStream)
*/
public void write(CompressingDataOutputStream s) throws IOException {
throw new UnsupportedOperationException("can't write custom pointcut designator expressions to stream");
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.PatternNode#accept(org.aspectj.weaver.patterns.PatternNodeVisitor, java.lang.Object)
*/
public Object accept(PatternNodeVisitor visitor, Object data) {
// visitor.visit(this);
// no-op?
return data;
}
}