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- /*******************************************************************************
- * 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:
- * Alexandre Vasseur initial implementation
- *******************************************************************************/
- package org.aspectj.weaver.patterns;
-
- import org.aspectj.weaver.BCException;
- import org.aspectj.weaver.ResolvedPointcutDefinition;
- import org.aspectj.weaver.ResolvedType;
- import org.aspectj.weaver.Shadow;
-
- /**
- * A visitor that turns a pointcut into a type pattern equivalent for a perthis or pertarget matching: - pertarget(target(Foo)) =>
- * Foo+ (this one is a special case..) - pertarget(execution(* Foo.do()) => Foo - perthis(call(* Foo.do()) => * - perthis(!call(*
- * Foo.do()) => * (see how the ! has been absorbed here..)
- *
- * @author <a href="mailto:alex AT gnilux DOT com">Alexandre Vasseur</a>
- */
- public class PerThisOrTargetPointcutVisitor extends AbstractPatternNodeVisitor {
-
- /** A maybe marker */
- private final static TypePattern MAYBE = new TypePatternMayBe();
-
- private final boolean m_isTarget;
- private final ResolvedType m_fromAspectType;
-
- public PerThisOrTargetPointcutVisitor(boolean isTarget, ResolvedType fromAspectType) {
- m_isTarget = isTarget;
- m_fromAspectType = fromAspectType;
- }
-
- public TypePattern getPerTypePointcut(Pointcut perClausePointcut) {
- Object o = perClausePointcut.accept(this, perClausePointcut);
- if (o instanceof TypePattern) {
- return (TypePattern) o;
- } else {
- throw new BCException("perClausePointcut visitor did not return a typepattern, it returned " + o
- + (o == null ? "" : " of type " + o.getClass()));
- }
- }
-
- // -- visitor methods, all is like Identity visitor except when it comes to transform pointcuts
-
- public Object visit(WithinPointcut node, Object data) {
- if (m_isTarget) {
- // pertarget(.. && within(Foo)) => true
- // pertarget(.. && !within(Foo)) => true as well !
- return MAYBE;
- } else {
- return node.getTypePattern();
- }
- }
-
- public Object visit(WithincodePointcut node, Object data) {
- if (m_isTarget) {
- // pertarget(.. && withincode(* Foo.do())) => true
- // pertarget(.. && !withincode(* Foo.do())) => true as well !
- return MAYBE;
- } else {
- return node.getSignature().getDeclaringType();
- }
- }
-
- public Object visit(WithinAnnotationPointcut node, Object data) {
- if (m_isTarget) {
- return MAYBE;
- } else {
- return new AnyWithAnnotationTypePattern(node.getAnnotationTypePattern());
- }
- }
-
- public Object visit(WithinCodeAnnotationPointcut node, Object data) {
- if (m_isTarget) {
- return MAYBE;
- } else {
- return MAYBE;// FIXME AV - can we optimize ? perthis(@withincode(Foo)) = hasmethod(..)
- }
- }
-
- public Object visit(KindedPointcut node, Object data) {
- if (node.getKind().equals(Shadow.AdviceExecution)) {
- return MAYBE;// TODO AV - can we do better ?
- } else if (node.getKind().equals(Shadow.ConstructorExecution) || node.getKind().equals(Shadow.Initialization)
- || node.getKind().equals(Shadow.MethodExecution) || node.getKind().equals(Shadow.PreInitialization)
- || node.getKind().equals(Shadow.StaticInitialization)) {
- SignaturePattern signaturePattern = node.getSignature();
- boolean isStarAnnotation = signaturePattern.isStarAnnotation();
- // For a method execution joinpoint, we check for an annotation pattern. If there is one we know it will be matched
- // against the 'primary' joinpoint (the one in the type) - 'super'joinpoints can't match it. If this situation occurs
- // we can re-use the HasMemberTypePattern to guard on whether the perthis/target should match. pr354470
- if (!m_isTarget && node.getKind().equals(Shadow.MethodExecution)) {
- if (!isStarAnnotation) {
- return new HasMemberTypePatternForPerThisMatching(signaturePattern);
- }
- }
- return signaturePattern.getDeclaringType();
- } else if (node.getKind().equals(Shadow.ConstructorCall) || node.getKind().equals(Shadow.FieldGet)
- || node.getKind().equals(Shadow.FieldSet) || node.getKind().equals(Shadow.MethodCall)) {
- if (m_isTarget) {
- return node.getSignature().getDeclaringType();
- } else {
- return MAYBE;
- }
- } else if (node.getKind().equals(Shadow.ExceptionHandler)) {
- return MAYBE;
- } else {
- throw new ParserException("Undetermined - should not happen: " + node.getKind().getSimpleName(), null);
- }
- }
-
- public Object visit(AndPointcut node, Object data) {
- return new AndTypePattern(getPerTypePointcut(node.left), getPerTypePointcut(node.right));
- }
-
- public Object visit(OrPointcut node, Object data) {
- return new OrTypePattern(getPerTypePointcut(node.left), getPerTypePointcut(node.right));
- }
-
- public Object visit(NotPointcut node, Object data) {
- // TypePattern negated = getPerTypePointcut(node.getNegatedPointcut());
- // if (MAYBE.equals(negated)) {
- // return MAYBE;
- // }
- // return new NotTypePattern(negated);
- // AMC - the only safe thing to return here is maybe...
- // see for example pr114054
- return MAYBE;
- }
-
- public Object visit(ThisOrTargetAnnotationPointcut node, Object data) {
- if (m_isTarget && !node.isThis()) {
- return new AnyWithAnnotationTypePattern(node.getAnnotationTypePattern());
- } else if (!m_isTarget && node.isThis()) {
- return new AnyWithAnnotationTypePattern(node.getAnnotationTypePattern());
- } else {
- // perthis(@target(Foo))
- return MAYBE;
- }
- }
-
- public Object visit(ThisOrTargetPointcut node, Object data) {
- if ((m_isTarget && !node.isThis()) || (!m_isTarget && node.isThis())) {
- String pointcutString = node.getType().toString();
- // see pr115788 "<nothing>" means there was a problem resolving types - that will be reported so dont blow up
- // the parser here..
- if (pointcutString.equals("<nothing>")) {
- return new NoTypePattern();
- }
- // pertarget(target(Foo)) => Foo+ for type pattern matching
- // perthis(this(Foo)) => Foo+ for type pattern matching
- // TODO AV - we do like a deep copy by parsing it again.. quite dirty, would need a clean deep copy
- TypePattern copy = new PatternParser(pointcutString.replace('$', '.')).parseTypePattern();
- // TODO AV - see dirty replace from $ to . here as inner classes are with $ instead (#108488)
- copy.includeSubtypes = true;
- return copy;
- } else {
- // perthis(target(Foo)) => maybe
- return MAYBE;
- }
- }
-
- public Object visit(ReferencePointcut node, Object data) {
- // && pc_ref()
- // we know there is no support for binding in perClause: perthis(pc_ref(java.lang.String))
- // TODO AV - may need some work for generics..
-
- ResolvedPointcutDefinition pointcutDec;
- ResolvedType searchStart = m_fromAspectType;
- if (node.onType != null) {
- searchStart = node.onType.resolve(m_fromAspectType.getWorld());
- if (searchStart.isMissing()) {
- return MAYBE;// this should not happen since concretize will fails but just in case..
- }
- }
- pointcutDec = searchStart.findPointcut(node.name);
-
- return getPerTypePointcut(pointcutDec.getPointcut());
- }
-
- public Object visit(IfPointcut node, Object data) {
- return TypePattern.ANY;
- }
-
- public Object visit(HandlerPointcut node, Object data) {
- // quiet unexpected since a KindedPointcut but do as if...
- return MAYBE;
- }
-
- public Object visit(CflowPointcut node, Object data) {
- return MAYBE;
- }
-
- public Object visit(ConcreteCflowPointcut node, Object data) {
- return MAYBE;
- }
-
- public Object visit(ArgsPointcut node, Object data) {
- return MAYBE;
- }
-
- public Object visit(ArgsAnnotationPointcut node, Object data) {
- return MAYBE;
- }
-
- public Object visit(AnnotationPointcut node, Object data) {
- return MAYBE;
- }
-
- public Object visit(Pointcut.MatchesNothingPointcut node, Object data) {
- // a small hack since the usual MatchNothing has its toString = "<nothing>" which is not parseable back
- // while I use back parsing for check purpose.
- return new NoTypePattern() {
- public String toString() {
- return "false";
- }
- };
- }
-
- /**
- * A MayBe type pattern that acts as ANY except that !MAYBE = MAYBE
- *
- * @author <a href="mailto:alex AT gnilux DOT com">Alexandre Vasseur</a>
- */
- private static class TypePatternMayBe extends AnyTypePattern {
- }
- }
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