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/* *******************************************************************
* 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.IOException;
import java.util.List;
import java.util.Map;
import org.aspectj.bridge.ISourceLocation;
import org.aspectj.bridge.Message;
import org.aspectj.util.FuzzyBoolean;
import org.aspectj.weaver.CompressingDataOutputStream;
import org.aspectj.weaver.IntMap;
import org.aspectj.weaver.Member;
import org.aspectj.weaver.MemberImpl;
import org.aspectj.weaver.NameMangler;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.Shadow;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.World;
import org.aspectj.weaver.ast.Expr;
import org.aspectj.weaver.ast.Test;
public class ConcreteCflowPointcut extends Pointcut {
private final Member cflowField;
List<Slot> slots; // exposed for testing
boolean usesCounter;
ResolvedType aspect;
// Can either use a counter or a stack to implement cflow.
public ConcreteCflowPointcut(ResolvedType aspect, Member cflowField, List<Slot> slots, boolean usesCounter) {
this.aspect = aspect;
this.cflowField = cflowField;
this.slots = slots;
this.usesCounter = usesCounter;
this.pointcutKind = CFLOW;
}
public int couldMatchKinds() {
return Shadow.ALL_SHADOW_KINDS_BITS;
}
public FuzzyBoolean fastMatch(FastMatchInfo type) {
return FuzzyBoolean.MAYBE;
}
protected FuzzyBoolean matchInternal(Shadow shadow) {
// ??? this is not maximally efficient
// Check we'll be able to do the residue!
// this bit is for pr145693 - we cannot match at all if one of the types is missing, we will be unable
// to create the residue
if (slots != null) {
for (Slot slot: slots) {
ResolvedType rt = slot.formalType;
if (rt.isMissing()) {
ISourceLocation[] locs = new ISourceLocation[] { getSourceLocation() };
Message m = new Message(WeaverMessages.format(WeaverMessages.MISSING_TYPE_PREVENTS_MATCH, rt.getName()), "",
Message.WARNING, shadow.getSourceLocation(), null, locs);
rt.getWorld().getMessageHandler().handleMessage(m);
return FuzzyBoolean.NO;
}
}
}
return FuzzyBoolean.MAYBE;
}
// used by weaver when validating bindings
public int[] getUsedFormalSlots() {
if (slots == null) {
return new int[0];
}
int[] indices = new int[slots.size()];
for (int i = 0; i < indices.length; i++) {
indices[i] = ((Slot) slots.get(i)).formalIndex;
}
return indices;
}
public void write(CompressingDataOutputStream s) throws IOException {
throw new RuntimeException("unimplemented");
}
public void resolveBindings(IScope scope, Bindings bindings) {
throw new RuntimeException("unimplemented");
}
public Pointcut parameterizeWith(Map<String,UnresolvedType> typeVariableMap, World w) {
throw new RuntimeException("unimplemented");
}
public boolean equals(Object other) {
if (!(other instanceof ConcreteCflowPointcut)) {
return false;
}
ConcreteCflowPointcut o = (ConcreteCflowPointcut) other;
return o.cflowField.equals(this.cflowField);
}
public int hashCode() {
int result = 17;
result = 37 * result + cflowField.hashCode();
return result;
}
public String toString() {
return "concretecflow(" + cflowField + ")";
}
protected Test findResidueInternal(Shadow shadow, ExposedState state) {
// System.out.println("find residue: " + this);
if (usesCounter) {
return Test.makeFieldGetCall(cflowField, cflowCounterIsValidMethod, Expr.NONE);
} else {
if (slots != null) { // null for cflows managed by counters
for (Slot slot: slots) {
// System.out.println("slot: " + slot.formalIndex);
state.set(slot.formalIndex,
aspect.getWorld().getWeavingSupport().makeCflowAccessVar(slot.formalType, cflowField, slot.arrayIndex));
}
}
return Test.makeFieldGetCall(cflowField, cflowStackIsValidMethod, Expr.NONE);
}
}
private static final Member cflowStackIsValidMethod = MemberImpl.method(NameMangler.CFLOW_STACK_UNRESOLVEDTYPE, 0,
UnresolvedType.BOOLEAN, "isValid", UnresolvedType.NONE);
private static final Member cflowCounterIsValidMethod = MemberImpl.method(NameMangler.CFLOW_COUNTER_UNRESOLVEDTYPE, 0,
UnresolvedType.BOOLEAN, "isValid", UnresolvedType.NONE);
public Pointcut concretize1(ResolvedType inAspect, ResolvedType declaringType, IntMap bindings) {
throw new RuntimeException("unimplemented");
}
public Object accept(PatternNodeVisitor visitor, Object data) {
return visitor.visit(this, data);
}
public static class Slot {
int formalIndex;
ResolvedType formalType;
int arrayIndex;
public Slot(int formalIndex, ResolvedType formalType, int arrayIndex) {
this.formalIndex = formalIndex;
this.formalType = formalType;
this.arrayIndex = arrayIndex;
}
public boolean equals(Object other) {
if (!(other instanceof Slot)) {
return false;
}
Slot o = (Slot) other;
return o.formalIndex == this.formalIndex && o.arrayIndex == this.arrayIndex && o.formalType.equals(this.formalType);
}
public int hashCode() {
int result = 19;
result = 37 * result + formalIndex;
result = 37 * result + arrayIndex;
result = 37 * result + formalType.hashCode();
return result;
}
public String toString() {
return "Slot(" + formalIndex + ", " + formalType + ", " + arrayIndex + ")";
}
}
}
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