org.aspectj.weaver.patterns.ThisOrTargetPointcut Maven / Gradle / Ivy
/* *******************************************************************
* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
* 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
*
* Contributors:
* PARC initial implementation
* ******************************************************************/
package org.aspectj.weaver.patterns;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.MessageUtil;
import org.aspectj.util.FuzzyBoolean;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.IntMap;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.Shadow;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.World;
import org.aspectj.weaver.ast.Literal;
import org.aspectj.weaver.ast.Test;
import org.aspectj.weaver.ast.Var;
//
/**
* Corresponds to target or this pcd.
*
* type is initially a WildTypePattern. If it stays that way, it's a this(Foo)
* type deal.
* however, the resolveBindings method may convert it to a BindingTypePattern,
* in which
* case, it's a this(foo) type deal.
*
* @author Erik Hilsdale
* @author Jim Hugunin
*/
public class ThisOrTargetPointcut extends NameBindingPointcut {
private boolean isThis;
private TypePattern type;
private String declarationText;
private static final int thisKindSet;
private static final int targetKindSet;
static {
int thisFlags = Shadow.ALL_SHADOW_KINDS_BITS;
int targFlags = Shadow.ALL_SHADOW_KINDS_BITS;
for (int i = 0; i < Shadow.SHADOW_KINDS.length; i++) {
Shadow.Kind kind = Shadow.SHADOW_KINDS[i];
if (kind.neverHasThis()) thisFlags-=kind.bit;
if (kind.neverHasTarget()) targFlags-=kind.bit;
}
thisKindSet = thisFlags;
targetKindSet=targFlags;
}
public boolean isBinding() {
return (type instanceof BindingTypePattern);
}
public ThisOrTargetPointcut(boolean isThis, TypePattern type) {
this.isThis = isThis;
this.type = type;
this.pointcutKind = THIS_OR_TARGET;
this.declarationText = (isThis ? "this(" : "target(") + type + ")";
}
public TypePattern getType() {
return type;
}
public boolean isThis() { return isThis; }
public Pointcut parameterizeWith(Map typeVariableMap,World w) {
ThisOrTargetPointcut ret = new ThisOrTargetPointcut(isThis,type.parameterizeWith(typeVariableMap,w));
ret.copyLocationFrom(this);
return ret;
}
public int couldMatchKinds() {
return isThis ? thisKindSet : targetKindSet;
}
public FuzzyBoolean fastMatch(FastMatchInfo type) {
return FuzzyBoolean.MAYBE;
}
private boolean couldMatch(Shadow shadow) {
return isThis ? shadow.hasThis() : shadow.hasTarget();
}
protected FuzzyBoolean matchInternal(Shadow shadow) {
if (!couldMatch(shadow)) return FuzzyBoolean.NO;
UnresolvedType typeToMatch = isThis ? shadow.getThisType() : shadow.getTargetType();
//if (typeToMatch == ResolvedType.MISSING) return FuzzyBoolean.NO;
return type.matches(typeToMatch.resolve(shadow.getIWorld()), TypePattern.DYNAMIC);//AVPT was DYNAMIC
}
public void write(DataOutputStream s) throws IOException {
s.writeByte(Pointcut.THIS_OR_TARGET);
s.writeBoolean(isThis);
type.write(s);
writeLocation(s);
}
public static Pointcut read(VersionedDataInputStream s, ISourceContext context) throws IOException {
boolean isThis = s.readBoolean();
TypePattern type = TypePattern.read(s, context);
ThisOrTargetPointcut ret = new ThisOrTargetPointcut(isThis, type);
ret.readLocation(context, s);
return ret;
}
public void resolveBindings(IScope scope, Bindings bindings) {
type = type.resolveBindings(scope, bindings, true, true);
// look for parameterized type patterns which are not supported...
HasThisTypePatternTriedToSneakInSomeGenericOrParameterizedTypePatternMatchingStuffAnywhereVisitor
visitor = new HasThisTypePatternTriedToSneakInSomeGenericOrParameterizedTypePatternMatchingStuffAnywhereVisitor();
type.traverse(visitor, null);
if (visitor.wellHasItThen/*?*/()) {
scope.message(MessageUtil.error(WeaverMessages.format(WeaverMessages.THIS_AND_TARGET_DONT_SUPPORT_PARAMETERS),
getSourceLocation()));
}
// ??? handle non-formal
}
public void postRead(ResolvedType enclosingType) {
type.postRead(enclosingType);
}
/* (non-Javadoc)
* @see org.aspectj.weaver.patterns.NameBindingPointcut#getBindingAnnotationTypePatterns()
*/
public List getBindingAnnotationTypePatterns() {
return Collections.EMPTY_LIST;
}
/* (non-Javadoc)
* @see org.aspectj.weaver.patterns.NameBindingPointcut#getBindingTypePatterns()
*/
public List getBindingTypePatterns() {
if (type instanceof BindingTypePattern) {
List l = new ArrayList();
l.add(type);
return l;
} else return Collections.EMPTY_LIST;
}
public boolean equals(Object other) {
if (!(other instanceof ThisOrTargetPointcut)) return false;
ThisOrTargetPointcut o = (ThisOrTargetPointcut)other;
return o.isThis == this.isThis && o.type.equals(this.type);
}
public int hashCode() {
int result = 17;
result = 37*result + (isThis ? 0 : 1);
result = 37*result + type.hashCode();
return result;
}
public String toString() {
return declarationText;
}
/**
* Residue is the remainder of the pointcut match that couldn't be
* performed with the purely static information at compile time and
* this method returns the residue of a pointcut at a particular shadow.
*/
protected Test findResidueInternal(Shadow shadow, ExposedState state) {
if (!couldMatch(shadow)) return Literal.FALSE;
// if no preference is specified, just say TRUE which means no residue
if (type == TypePattern.ANY) return Literal.TRUE;
Var var = isThis ? shadow.getThisVar() : shadow.getTargetVar();
return exposeStateForVar(var, type, state, shadow.getIWorld());
}
public Pointcut concretize1(ResolvedType inAspect, ResolvedType declaringType, IntMap bindings) {
if (isDeclare(bindings.getEnclosingAdvice())) {
// Enforce rule about which designators are supported in declare
inAspect.getWorld().showMessage(IMessage.ERROR,
WeaverMessages.format(WeaverMessages.THIS_OR_TARGET_IN_DECLARE,isThis?"this":"target"),
bindings.getEnclosingAdvice().getSourceLocation(), null);
return Pointcut.makeMatchesNothing(Pointcut.CONCRETE);
}
TypePattern newType = type.remapAdviceFormals(bindings);
if (inAspect.crosscuttingMembers != null) {
inAspect.crosscuttingMembers.exposeType(newType.getExactType());
}
Pointcut ret = new ThisOrTargetPointcut(isThis, newType);
ret.copyLocationFrom(this);
return ret;
}
public Object accept(PatternNodeVisitor visitor, Object data) {
return visitor.visit(this, data);
}
}