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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.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.aspectj.bridge.ISourceLocation;
import org.aspectj.util.FuzzyBoolean;
import org.aspectj.weaver.AjAttribute;
import org.aspectj.weaver.AjcMemberMaker;
import org.aspectj.weaver.AnnotationTargetKind;
import org.aspectj.weaver.CompressingDataOutputStream;
import org.aspectj.weaver.ConcreteTypeMunger;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.JoinPointSignature;
import org.aspectj.weaver.JoinPointSignatureIterator;
import org.aspectj.weaver.Member;
import org.aspectj.weaver.MemberKind;
import org.aspectj.weaver.NewFieldTypeMunger;
import org.aspectj.weaver.ResolvableTypeList;
import org.aspectj.weaver.ResolvedMember;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.World;
public class SignaturePattern extends PatternNode implements ISignaturePattern {
private MemberKind kind;
private ModifiersPattern modifiers;
private TypePattern returnType;
private TypePattern declaringType;
private NamePattern name;
private TypePatternList parameterTypes;
private int bits = 0x0000;
private static final int PARAMETER_ANNOTATION_MATCHING = 0x0001;
private static final int CHECKED_FOR_PARAMETER_ANNOTATION_MATCHING = 0x0002;
private ThrowsPattern throwsPattern;
private AnnotationTypePattern annotationPattern;
private transient int hashcode = -1;
private transient boolean isExactDeclaringTypePattern = false;
public SignaturePattern(MemberKind kind, ModifiersPattern modifiers, TypePattern returnType, TypePattern declaringType,
NamePattern name, TypePatternList parameterTypes, ThrowsPattern throwsPattern, AnnotationTypePattern annotationPattern) {
this.kind = kind;
this.modifiers = modifiers;
this.returnType = returnType;
this.name = name;
this.declaringType = declaringType;
this.parameterTypes = parameterTypes;
this.throwsPattern = throwsPattern;
this.annotationPattern = annotationPattern;
this.isExactDeclaringTypePattern = (declaringType instanceof ExactTypePattern);
}
public SignaturePattern resolveBindings(IScope scope, Bindings bindings) {
if (returnType != null) {
returnType = returnType.resolveBindings(scope, bindings, false, false);
checkForIncorrectTargetKind(returnType, scope, false);
}
if (declaringType != null) {
declaringType = declaringType.resolveBindings(scope, bindings, false, false);
checkForIncorrectTargetKind(declaringType, scope, false);
isExactDeclaringTypePattern = (declaringType instanceof ExactTypePattern);
}
if (parameterTypes != null) {
parameterTypes = parameterTypes.resolveBindings(scope, bindings, false, false);
checkForIncorrectTargetKind(parameterTypes, scope, false, true);
}
if (throwsPattern != null) {
throwsPattern = throwsPattern.resolveBindings(scope, bindings);
if (throwsPattern.getForbidden().getTypePatterns().length > 0
|| throwsPattern.getRequired().getTypePatterns().length > 0) {
checkForIncorrectTargetKind(throwsPattern, scope, false);
}
}
if (annotationPattern != null) {
annotationPattern = annotationPattern.resolveBindings(scope, bindings, false);
checkForIncorrectTargetKind(annotationPattern, scope, true);
}
hashcode = -1;
return this;
}
private void checkForIncorrectTargetKind(PatternNode patternNode, IScope scope, boolean targetsOtherThanTypeAllowed) {
checkForIncorrectTargetKind(patternNode, scope, targetsOtherThanTypeAllowed, false);
}
// bug 115252 - adding an xlint warning if the annnotation target type is
// wrong. This logic, or similar, may have to be applied elsewhere in the case
// of pointcuts which don't go through SignaturePattern.resolveBindings(..)
private void checkForIncorrectTargetKind(PatternNode patternNode, IScope scope, boolean targetsOtherThanTypeAllowed,
boolean parameterTargettingAnnotationsAllowed) {
// return if we're not in java5 mode, if the unmatchedTargetKind Xlint
// warning has been turned off, or if the patternNode is *
if (!scope.getWorld().isInJava5Mode() || scope.getWorld().getLint().unmatchedTargetKind == null
|| (patternNode instanceof AnyTypePattern)) {
return;
}
if (patternNode instanceof ExactAnnotationTypePattern) {
ResolvedType resolvedType = ((ExactAnnotationTypePattern) patternNode).getAnnotationType().resolve(scope.getWorld());
if (targetsOtherThanTypeAllowed) {
AnnotationTargetKind[] targetKinds = resolvedType.getAnnotationTargetKinds();
if (targetKinds == null) {
return;
}
reportUnmatchedTargetKindMessage(targetKinds, patternNode, scope, true);
} else if (!targetsOtherThanTypeAllowed && !resolvedType.canAnnotationTargetType()) {
// everything is incorrect since we've already checked whether we have the TYPE target annotation
AnnotationTargetKind[] targetKinds = resolvedType.getAnnotationTargetKinds();
if (targetKinds == null) {
return;
}
reportUnmatchedTargetKindMessage(targetKinds, patternNode, scope, false);
}
} else {
TypePatternVisitor visitor = new TypePatternVisitor(scope, targetsOtherThanTypeAllowed,
parameterTargettingAnnotationsAllowed);
patternNode.traverse(visitor, null);
if (visitor.containedIncorrectTargetKind()) {
Set keys = visitor.getIncorrectTargetKinds().keySet();
for (Iterator iter = keys.iterator(); iter.hasNext();) {
PatternNode node = iter.next();
AnnotationTargetKind[] targetKinds = visitor.getIncorrectTargetKinds().get(node);
reportUnmatchedTargetKindMessage(targetKinds, node, scope, false);
}
}
}
}
private void reportUnmatchedTargetKindMessage(AnnotationTargetKind[] annotationTargetKinds, PatternNode node, IScope scope,
boolean checkMatchesMemberKindName) {
StringBuffer targetNames = new StringBuffer("{");
for (int i = 0; i < annotationTargetKinds.length; i++) {
AnnotationTargetKind targetKind = annotationTargetKinds[i];
if (checkMatchesMemberKindName && kind.getName().equals(targetKind.getName())) {
return;
}
if (i < (annotationTargetKinds.length - 1)) {
targetNames.append("ElementType." + targetKind.getName() + ",");
} else {
targetNames.append("ElementType." + targetKind.getName() + "}");
}
}
scope.getWorld().getLint().unmatchedTargetKind.signal(new String[] { node.toString(), targetNames.toString() },
getSourceLocation(), new ISourceLocation[0]);
}
/**
* Class which visits the nodes in the TypePattern tree until an ExactTypePattern is found. Once this is found it creates a new
* ExactAnnotationTypePattern and checks whether the targetKind (created via the @Target annotation) matches ElementType.TYPE if
* this is the only target kind which is allowed, or matches the signature pattern kind if there is no restriction.
*/
private class TypePatternVisitor extends AbstractPatternNodeVisitor {
private IScope scope;
private Map incorrectTargetKinds = new HashMap();
private boolean targetsOtherThanTypeAllowed;
private boolean parameterTargettingAnnotationsAllowed;
/**
* @param requiredTarget - the signature pattern Kind
* @param scope
* @param parameterTargettingAnnotationsAllowed
*/
public TypePatternVisitor(IScope scope, boolean targetsOtherThanTypeAllowed, boolean parameterTargettingAnnotationsAllowed) {
this.scope = scope;
this.targetsOtherThanTypeAllowed = targetsOtherThanTypeAllowed;
this.parameterTargettingAnnotationsAllowed = parameterTargettingAnnotationsAllowed;
}
@Override
public Object visit(WildAnnotationTypePattern node, Object data) {
node.getTypePattern().accept(this, data);
return node;
}
/**
* Do the ExactAnnotationTypePatterns have the incorrect target?
*/
@Override
public Object visit(ExactAnnotationTypePattern node, Object data) {
ResolvedType resolvedType = node.getAnnotationType().resolve(scope.getWorld());
if (targetsOtherThanTypeAllowed) {
AnnotationTargetKind[] targetKinds = resolvedType.getAnnotationTargetKinds();
if (targetKinds == null) {
return data;
}
List incorrectTargets = new ArrayList();
for (int i = 0; i < targetKinds.length; i++) {
if (targetKinds[i].getName().equals(kind.getName())
|| (targetKinds[i].getName().equals("PARAMETER") && node.isForParameterAnnotationMatch())) {
return data;
}
incorrectTargets.add(targetKinds[i]);
}
if (incorrectTargets.isEmpty()) {
return data;
}
AnnotationTargetKind[] kinds = new AnnotationTargetKind[incorrectTargets.size()];
incorrectTargetKinds.put(node, incorrectTargets.toArray(kinds));
} else if (!targetsOtherThanTypeAllowed && !resolvedType.canAnnotationTargetType()) {
AnnotationTargetKind[] targetKinds = resolvedType.getAnnotationTargetKinds();
if (targetKinds == null) {
return data;
}
// exception here is if parameter annotations are allowed
if (parameterTargettingAnnotationsAllowed) {
for (int i = 0; i < targetKinds.length; i++) {
AnnotationTargetKind annotationTargetKind = targetKinds[i];
if (annotationTargetKind.getName().equals("PARAMETER") && node.isForParameterAnnotationMatch()) {
return data;
}
}
}
incorrectTargetKinds.put(node, targetKinds);
}
return data;
}
@Override
public Object visit(ExactTypePattern node, Object data) {
ExactAnnotationTypePattern eatp = new ExactAnnotationTypePattern(node.getExactType().resolve(scope.getWorld()), null);
eatp.accept(this, data);
return data;
}
@Override
public Object visit(AndTypePattern node, Object data) {
node.getLeft().accept(this, data);
node.getRight().accept(this, data);
return node;
}
@Override
public Object visit(OrTypePattern node, Object data) {
node.getLeft().accept(this, data);
node.getRight().accept(this, data);
return node;
}
@Override
public Object visit(AnyWithAnnotationTypePattern node, Object data) {
node.getAnnotationPattern().accept(this, data);
return node;
}
public boolean containedIncorrectTargetKind() {
return (incorrectTargetKinds.size() != 0);
}
public Map getIncorrectTargetKinds() {
return incorrectTargetKinds;
}
}
public void postRead(ResolvedType enclosingType) {
if (returnType != null) {
returnType.postRead(enclosingType);
}
if (declaringType != null) {
declaringType.postRead(enclosingType);
}
if (parameterTypes != null) {
parameterTypes.postRead(enclosingType);
}
}
/**
* return a copy of this signature pattern in which every type variable reference is replaced by the corresponding entry in the
* map.
*/
public SignaturePattern parameterizeWith(Map typeVariableMap, World w) {
SignaturePattern ret = new SignaturePattern(kind, modifiers, returnType.parameterizeWith(typeVariableMap, w), declaringType
.parameterizeWith(typeVariableMap, w), name, parameterTypes.parameterizeWith(typeVariableMap, w), throwsPattern
.parameterizeWith(typeVariableMap, w), annotationPattern.parameterizeWith(typeVariableMap, w));
ret.copyLocationFrom(this);
return ret;
}
public boolean matches(Member joinPointSignature, World world, boolean allowBridgeMethods) {
// fail (or succeed!) fast tests...
if (joinPointSignature == null) {
return false;
}
if (kind != joinPointSignature.getKind()) {
return false;
}
if (kind == Member.ADVICE) {
return true;
}
// do the hard work then...
boolean subjectMatch = true;
boolean wantsAnnotationMatch = wantToMatchAnnotationPattern();
JoinPointSignatureIterator candidateMatches = joinPointSignature.getJoinPointSignatures(world);
while (candidateMatches.hasNext()) {
JoinPointSignature aSig = candidateMatches.next();
// System.out.println(aSig);
FuzzyBoolean matchResult = matchesExactly(aSig, world, allowBridgeMethods, subjectMatch);
if (matchResult.alwaysTrue()) {
return true;
} else if (matchResult.alwaysFalse()) {
return false;
}
// if we got a "MAYBE" it's worth looking at the other signatures
// The first signature is the subject signature - and against it we must match modifiers/annotations/throws
// see http://www.eclipse.org/aspectj/doc/next/adk15notebook/join-point-modifiers.html
subjectMatch = false;
// Early exit
if (wantsAnnotationMatch) {
return false;
}
}
return false;
}
// Does this pattern match this exact signature (no declaring type mucking about
// or chasing up the hierarchy)
// return YES if it does, NO if it doesn't and no ancester member could match either,
// and MAYBE if it doesn't but an ancester member could.
private FuzzyBoolean matchesExactly(JoinPointSignature aMember, World inAWorld, boolean allowBridgeMethods, boolean subjectMatch) {
// Java5 introduces bridge methods, we match a call to them but nothing else...
if (aMember.isBridgeMethod() && !allowBridgeMethods) {
return FuzzyBoolean.MAYBE;
}
// Only the subject is checked for modifiers
// see http://www.eclipse.org/aspectj/doc/next/adk15notebook/join-point-modifiers.html
if (subjectMatch && !modifiers.matches(aMember.getModifiers())) {
return FuzzyBoolean.NO;
}
FuzzyBoolean matchesIgnoringAnnotations = FuzzyBoolean.YES;
if (kind == Member.STATIC_INITIALIZATION) {
matchesIgnoringAnnotations = matchesExactlyStaticInitialization(aMember, inAWorld);
} else if (kind == Member.FIELD) {
matchesIgnoringAnnotations = matchesExactlyField(aMember, inAWorld);
} else if (kind == Member.METHOD) {
matchesIgnoringAnnotations = matchesExactlyMethod(aMember, inAWorld, subjectMatch);
} else if (kind == Member.CONSTRUCTOR) {
matchesIgnoringAnnotations = matchesExactlyConstructor(aMember, inAWorld);
}
if (matchesIgnoringAnnotations.alwaysFalse()) {
return FuzzyBoolean.NO;
}
// Only the subject is checked for annotations (239441/119749)
// see http://www.eclipse.org/aspectj/doc/next/adk15notebook/join-point-modifiers.html
if (subjectMatch) {
// The annotations must match if specified
if (!matchesAnnotations(aMember, inAWorld).alwaysTrue()) {
return FuzzyBoolean.NO;
} else {
return matchesIgnoringAnnotations;
}
} else {
// Unless they specified any annotation then it is a failure
if (annotationPattern instanceof AnyAnnotationTypePattern) {
return matchesIgnoringAnnotations;
} else {
return FuzzyBoolean.NO;
}
}
// if (subjectMatch && !matchesAnnotations(aMember, inAWorld).alwaysTrue()) {
// return FuzzyBoolean.NO;
// } else {
//
// return matchesIgnoringAnnotations;
// }
}
private boolean wantToMatchAnnotationPattern() {
return !(annotationPattern instanceof AnyAnnotationTypePattern);
}
/**
* Matches on declaring type
*/
private FuzzyBoolean matchesExactlyStaticInitialization(JoinPointSignature aMember, World world) {
return FuzzyBoolean.fromBoolean(declaringType.matchesStatically(aMember.getDeclaringType().resolve(world)));
}
/**
* Matches on name, declaring type, field type
*/
private FuzzyBoolean matchesExactlyField(JoinPointSignature aField, World world) {
if (!name.matches(aField.getName())) {
return FuzzyBoolean.NO;
}
ResolvedType fieldDeclaringType = aField.getDeclaringType().resolve(world);
if (!declaringType.matchesStatically(fieldDeclaringType)) {
return FuzzyBoolean.MAYBE;
}
if (!returnType.matchesStatically(aField.getReturnType().resolve(world))) {
// looking bad, but there might be parameterization to consider...
if (!returnType.matchesStatically(aField.getGenericReturnType().resolve(world))) {
// ok, it's bad.
return FuzzyBoolean.MAYBE;
}
}
// passed all the guards...
return FuzzyBoolean.YES;
}
/**
* Quickly detect if the joinpoint absolutely cannot match becaused the method parameters at the joinpoint cannot match against
* this signature pattern.
*
* @param methodJoinpoint the joinpoint to quickly match against
* @return true if it is impossible for the joinpoint to match this signature
*/
private boolean parametersCannotMatch(JoinPointSignature methodJoinpoint) {
if (methodJoinpoint.isVarargsMethod()) {
// just give up early (for now)
return false;
}
int patternParameterCount = parameterTypes.size();
if (patternParameterCount == 0 || parameterTypes.ellipsisCount == 0) {
boolean equalCount = patternParameterCount == methodJoinpoint.getParameterTypes().length;
// Quick rule: pattern specifies zero parameters, and joinpoint has parameters *OR*
if (patternParameterCount == 0 && !equalCount) {
return true;
}
// Quick rule: pattern doesn't specify ellipsis and there are a different number of parameters on the
// method join point as compared with the pattern
if (parameterTypes.ellipsisCount == 0 && !equalCount) {
if (patternParameterCount > 0 && parameterTypes.get(patternParameterCount - 1).isVarArgs()) {
return false;
}
return true;
}
}
return false;
}
/**
* Matches on name, declaring type, return type, parameter types, throws types
*/
private FuzzyBoolean matchesExactlyMethod(JoinPointSignature aMethod, World world, boolean subjectMatch) {
if (parametersCannotMatch(aMethod)) {
// System.err.println("Parameter types pattern " + parameterTypes + " pcount: " + aMethod.getParameterTypes().length);
return FuzzyBoolean.NO;
}
// OPTIMIZE only for exact match do the pattern match now? Otherwise defer it until other fast checks complete?
if (!name.matches(aMethod.getName())) {
return FuzzyBoolean.NO;
}
// Check the throws pattern
if (subjectMatch && !throwsPattern.matches(aMethod.getExceptions(), world)) {
return FuzzyBoolean.NO;
}
// '*' trivially matches everything, no need to check further
if (!declaringType.isStar()) {
if (!declaringType.matchesStatically(aMethod.getDeclaringType().resolve(world))) {
return FuzzyBoolean.MAYBE;
}
}
// '*' would match any return value
if (!returnType.isStar()) {
boolean b = returnType.isBangVoid();
if (b) {
String s = aMethod.getReturnType().getSignature();
if (s.length() == 1 && s.charAt(0) == 'V') {
// it is void, so not a match
return FuzzyBoolean.NO;
}
} else {
if (returnType.isVoid()) {
String s = aMethod.getReturnType().getSignature();
if (s.length() != 1 || s.charAt(0) != 'V') {
// it is not void, so not a match
return FuzzyBoolean.NO;
}
} else {
if (!returnType.matchesStatically(aMethod.getReturnType().resolve(world))) {
// looking bad, but there might be parameterization to consider...
if (!returnType.matchesStatically(aMethod.getGenericReturnType().resolve(world))) {
// ok, it's bad.
return FuzzyBoolean.MAYBE;
}
}
}
}
}
// The most simple case: pattern is (..) will match anything
if (parameterTypes.size() == 1 && parameterTypes.get(0).isEllipsis()) {
return FuzzyBoolean.YES;
}
if (!parameterTypes.canMatchSignatureWithNParameters(aMethod.getParameterTypes().length)) {
return FuzzyBoolean.NO;
}
// OPTIMIZE both resolution of these types and their annotations should be deferred - just pass down a world and do it lower
// down
// ResolvedType[] resolvedParameters = world.resolve(aMethod.getParameterTypes());
ResolvableTypeList rtl = new ResolvableTypeList(world, aMethod.getParameterTypes());
// Only fetch the parameter annotations if the pointcut is going to be matching on them
ResolvedType[][] parameterAnnotationTypes = null;
if (isMatchingParameterAnnotations()) {
parameterAnnotationTypes = aMethod.getParameterAnnotationTypes();
if (parameterAnnotationTypes != null && parameterAnnotationTypes.length == 0) {
parameterAnnotationTypes = null;
}
}
if (!parameterTypes.matches(rtl, TypePattern.STATIC, parameterAnnotationTypes).alwaysTrue()) {
// It could still be a match based on the generic sig parameter types of a parameterized type
if (!parameterTypes.matches(new ResolvableTypeList(world, aMethod.getGenericParameterTypes()), TypePattern.STATIC,
parameterAnnotationTypes).alwaysTrue()) {
return FuzzyBoolean.MAYBE;
// It could STILL be a match based on the erasure of the parameter types??
// to be determined via test cases...
}
}
// check that varargs specifications match
if (!matchesVarArgs(aMethod, world)) {
return FuzzyBoolean.MAYBE;
}
// passed all the guards..
return FuzzyBoolean.YES;
}
/**
* Determine if any pattern in the parameter type pattern list is attempting to match on parameter annotations.
*
* @return true if a parameter type pattern wants to match on a parameter annotation
*/
private boolean isMatchingParameterAnnotations() {
if ((bits & CHECKED_FOR_PARAMETER_ANNOTATION_MATCHING) == 0) {
bits |= CHECKED_FOR_PARAMETER_ANNOTATION_MATCHING;
for (int tp = 0, max = parameterTypes.size(); tp < max; tp++) {
TypePattern typePattern = parameterTypes.get(tp);
if (isParameterAnnotationMatching(typePattern)) {
bits |= PARAMETER_ANNOTATION_MATCHING;
}
}
}
return (bits & PARAMETER_ANNOTATION_MATCHING) != 0;
}
/**
* Walk the simple structure of a type pattern and determine if any leaf node is involved in parameter annotation matching.
*/
private boolean isParameterAnnotationMatching(TypePattern tp) {
if (tp instanceof OrTypePattern) {
OrTypePattern orAtp = (OrTypePattern) tp;
return (isParameterAnnotationMatching(orAtp.getLeft()) || isParameterAnnotationMatching(orAtp.getRight()));
} else if (tp instanceof AndTypePattern) {
AndTypePattern andAtp = (AndTypePattern) tp;
return (isParameterAnnotationMatching(andAtp.getLeft()) || isParameterAnnotationMatching(andAtp.getRight()));
} else if (tp instanceof NotTypePattern) {
NotTypePattern notAtp = (NotTypePattern) tp;
return (isParameterAnnotationMatching(notAtp.getNegatedPattern()));
} else {
AnnotationTypePattern atp = tp.getAnnotationPattern();
return isParameterAnnotationMatching(atp);
}
}
private boolean isParameterAnnotationMatching(AnnotationTypePattern tp) {
if (tp instanceof OrAnnotationTypePattern) {
OrAnnotationTypePattern orAtp = (OrAnnotationTypePattern) tp;
return (isParameterAnnotationMatching(orAtp.getLeft()) || isParameterAnnotationMatching(orAtp.getRight()));
} else if (tp instanceof AndAnnotationTypePattern) {
AndAnnotationTypePattern andAtp = (AndAnnotationTypePattern) tp;
return (isParameterAnnotationMatching(andAtp.getLeft()) || isParameterAnnotationMatching(andAtp.getRight()));
} else if (tp instanceof NotAnnotationTypePattern) {
NotAnnotationTypePattern notAtp = (NotAnnotationTypePattern) tp;
return (isParameterAnnotationMatching(notAtp.negatedPattern));
} else {
return tp.isForParameterAnnotationMatch();
}
}
/**
* match on declaring type, parameter types, throws types
*/
private FuzzyBoolean matchesExactlyConstructor(JoinPointSignature aConstructor, World world) {
if (!declaringType.matchesStatically(aConstructor.getDeclaringType().resolve(world))) {
return FuzzyBoolean.NO;
}
if (!parameterTypes.canMatchSignatureWithNParameters(aConstructor.getParameterTypes().length)) {
return FuzzyBoolean.NO;
}
ResolvedType[] resolvedParameters = world.resolve(aConstructor.getParameterTypes());
ResolvedType[][] parameterAnnotationTypes = aConstructor.getParameterAnnotationTypes();
if (parameterAnnotationTypes == null || parameterAnnotationTypes.length == 0) {
parameterAnnotationTypes = null;
}
if (!parameterTypes.matches(resolvedParameters, TypePattern.STATIC, parameterAnnotationTypes).alwaysTrue()) {
// It could still be a match based on the generic sig parameter types of a parameterized type
if (!parameterTypes.matches(world.resolve(aConstructor.getGenericParameterTypes()), TypePattern.STATIC).alwaysTrue()) {
return FuzzyBoolean.MAYBE;
// It could STILL be a match based on the erasure of the parameter types??
// to be determined via test cases...
}
}
// check that varargs specifications match
if (!matchesVarArgs(aConstructor, world)) {
return FuzzyBoolean.NO;
}
// Check the throws pattern
if (!throwsPattern.matches(aConstructor.getExceptions(), world)) {
return FuzzyBoolean.NO;
}
// passed all the guards..
return FuzzyBoolean.YES;
}
/**
* We've matched against this method or constructor so far, but without considering varargs (which has been matched as a simple
* array thus far). Now we do the additional checks to see if the parties agree on whether the last parameter is varargs or a
* straight array.
*/
private boolean matchesVarArgs(JoinPointSignature aMethodOrConstructor, World inAWorld) {
if (parameterTypes.size() == 0) {
return true;
}
TypePattern lastPattern = parameterTypes.get(parameterTypes.size() - 1);
boolean canMatchVarArgsSignature = lastPattern.isStar() || lastPattern.isVarArgs() || (lastPattern == TypePattern.ELLIPSIS);
if (aMethodOrConstructor.isVarargsMethod()) {
// we have at least one parameter in the pattern list, and the method has a varargs signature
if (!canMatchVarArgsSignature) {
// XXX - Ideally the shadow would be included in the msg but we don't know it...
inAWorld.getLint().cantMatchArrayTypeOnVarargs.signal(aMethodOrConstructor.toString(), getSourceLocation());
return false;
}
} else {
// the method ends with an array type, check that we don't *require* a varargs
if (lastPattern.isVarArgs()) {
return false;
}
}
return true;
}
private FuzzyBoolean matchesAnnotations(ResolvedMember member, World world) {
if (member == null) {
// world.getLint().unresolvableMember.signal(member.toString(), getSourceLocation());
return FuzzyBoolean.NO;
}
annotationPattern.resolve(world);
// optimization before we go digging around for annotations on ITDs
if (annotationPattern instanceof AnyAnnotationTypePattern) {
return FuzzyBoolean.YES;
}
// fake members represent ITD'd fields - for their annotations we should go and look up the
// relevant member in the original aspect
if (member.isAnnotatedElsewhere() && member.getKind() == Member.FIELD) {
// FIXME asc duplicate of code in AnnotationPointcut.matchInternal()? same fixmes apply here.
// ResolvedMember [] mems = member.getDeclaringType().resolve(world).getDeclaredFields(); // FIXME asc should include
// supers with getInterTypeMungersIncludingSupers?
List mungers = member.getDeclaringType().resolve(world).getInterTypeMungers();
for (ConcreteTypeMunger typeMunger : mungers) {
if (typeMunger.getMunger() instanceof NewFieldTypeMunger) {
ResolvedMember fakerm = typeMunger.getSignature();
ResolvedMember ajcMethod = AjcMemberMaker.interFieldInitializer(fakerm, typeMunger.getAspectType());
ResolvedMember rmm = findMethod(typeMunger.getAspectType(), ajcMethod);
if (fakerm.equals(member)) {
member = rmm;
}
}
}
}
if (annotationPattern.matches(member).alwaysTrue()) {
return FuzzyBoolean.YES;
} else {
// do NOT look at ancestor members... only the subject can have an annotation match
// see http://www.eclipse.org/aspectj/doc/next/adk15notebook/join-point-modifiers.html
return FuzzyBoolean.NO;
}
}
private ResolvedMember findMethod(ResolvedType aspectType, ResolvedMember ajcMethod) {
ResolvedMember decMethods[] = aspectType.getDeclaredMethods();
for (int i = 0; i < decMethods.length; i++) {
ResolvedMember member = decMethods[i];
if (member.equals(ajcMethod)) {
return member;
}
}
return null;
}
public boolean declaringTypeMatchAllowingForCovariance(Member member, UnresolvedType shadowDeclaringType, World world,
TypePattern returnTypePattern, ResolvedType sigReturn) {
ResolvedType onType = shadowDeclaringType.resolve(world);
// fastmatch
if (declaringType.matchesStatically(onType) && returnTypePattern.matchesStatically(sigReturn)) {
return true;
}
Collection declaringTypes = member.getDeclaringTypes(world);
boolean checkReturnType = true;
// XXX Possible enhancement? Doesn't seem to speed things up
// if (returnTypePattern.isStar()) {
// if (returnTypePattern instanceof WildTypePattern) {
// if (((WildTypePattern)returnTypePattern).getDimensions()==0) checkReturnType = false;
// }
// }
// Sometimes that list includes types that don't explicitly declare the member we are after -
// they are on the list because their supertype is on the list, that's why we use
// lookupMethod rather than lookupMemberNoSupers()
for (ResolvedType type : declaringTypes) {
if (declaringType.matchesStatically(type)) {
if (!checkReturnType) {
return true;
}
ResolvedMember rm = type.lookupMethod(member);
if (rm == null) {
rm = type.lookupMethodInITDs(member); // It must be in here, or we have *real* problems
}
if (rm == null) {
continue; // might be currently looking at the generic type and we need to continue searching in case we hit a
}
// parameterized version of this same type...
UnresolvedType returnTypeX = rm.getReturnType();
ResolvedType returnType = returnTypeX.resolve(world);
if (returnTypePattern.matchesStatically(returnType)) {
return true;
}
}
}
return false;
}
// private Collection getDeclaringTypes(Signature sig) {
// List l = new ArrayList();
// Class onType = sig.getDeclaringType();
// String memberName = sig.getName();
// if (sig instanceof FieldSignature) {
// Class fieldType = ((FieldSignature)sig).getFieldType();
// Class superType = onType;
// while(superType != null) {
// try {
// Field f = (superType.getDeclaredField(memberName));
// if (f.getType() == fieldType) {
// l.add(superType);
// }
// } catch (NoSuchFieldException nsf) {}
// superType = superType.getSuperclass();
// }
// } else if (sig instanceof MethodSignature) {
// Class[] paramTypes = ((MethodSignature)sig).getParameterTypes();
// Class superType = onType;
// while(superType != null) {
// try {
// superType.getDeclaredMethod(memberName,paramTypes);
// l.add(superType);
// } catch (NoSuchMethodException nsm) {}
// superType = superType.getSuperclass();
// }
// }
// return l;
// }
public NamePattern getName() {
return name;
}
public TypePattern getDeclaringType() {
return declaringType;
}
public MemberKind getKind() {
return kind;
}
@Override
public String toString() {
StringBuffer buf = new StringBuffer();
if (annotationPattern != AnnotationTypePattern.ANY) {
buf.append(annotationPattern.toString());
buf.append(' ');
}
if (modifiers != ModifiersPattern.ANY) {
buf.append(modifiers.toString());
buf.append(' ');
}
if (kind == Member.STATIC_INITIALIZATION) {
buf.append(declaringType.toString());
buf.append(".()");// FIXME AV - bad, cannot be parsed again
} else if (kind == Member.HANDLER) {
buf.append("handler(");
buf.append(parameterTypes.get(0));
buf.append(")");
} else {
if (!(kind == Member.CONSTRUCTOR)) {
buf.append(returnType.toString());
buf.append(' ');
}
if (declaringType != TypePattern.ANY) {
buf.append(declaringType.toString());
buf.append('.');
}
if (kind == Member.CONSTRUCTOR) {
buf.append("new");
} else {
buf.append(name.toString());
}
if (kind == Member.METHOD || kind == Member.CONSTRUCTOR) {
buf.append(parameterTypes.toString());
}
// FIXME AV - throws is not printed here, weird
}
return buf.toString();
}
@Override
public boolean equals(Object other) {
if (!(other instanceof SignaturePattern)) {
return false;
}
SignaturePattern o = (SignaturePattern) other;
return o.kind.equals(this.kind) && o.modifiers.equals(this.modifiers) && o.returnType.equals(this.returnType)
&& o.declaringType.equals(this.declaringType) && o.name.equals(this.name)
&& o.parameterTypes.equals(this.parameterTypes) && o.throwsPattern.equals(this.throwsPattern)
&& o.annotationPattern.equals(this.annotationPattern);
}
@Override
public int hashCode() {
if (hashcode == -1) {
hashcode = 17;
hashcode = 37 * hashcode + kind.hashCode();
hashcode = 37 * hashcode + modifiers.hashCode();
hashcode = 37 * hashcode + returnType.hashCode();
hashcode = 37 * hashcode + declaringType.hashCode();
hashcode = 37 * hashcode + name.hashCode();
hashcode = 37 * hashcode + parameterTypes.hashCode();
hashcode = 37 * hashcode + throwsPattern.hashCode();
hashcode = 37 * hashcode + annotationPattern.hashCode();
}
return hashcode;
}
@Override
public void write(CompressingDataOutputStream s) throws IOException {
kind.write(s);
modifiers.write(s);
returnType.write(s);
declaringType.write(s);
name.write(s);
parameterTypes.write(s);
throwsPattern.write(s);
annotationPattern.write(s);
writeLocation(s);
}
public static SignaturePattern read(VersionedDataInputStream s, ISourceContext context) throws IOException {
// ISignaturePattern kind should already have been read by the time this read is entered
MemberKind kind = MemberKind.read(s);
ModifiersPattern modifiers = ModifiersPattern.read(s);
TypePattern returnType = TypePattern.read(s, context);
TypePattern declaringType = TypePattern.read(s, context);
NamePattern name = NamePattern.read(s);
TypePatternList parameterTypes = TypePatternList.read(s, context);
ThrowsPattern throwsPattern = ThrowsPattern.read(s, context);
AnnotationTypePattern annotationPattern = AnnotationTypePattern.ANY;
if (s.getMajorVersion() >= AjAttribute.WeaverVersionInfo.WEAVER_VERSION_MAJOR_AJ150) {
annotationPattern = AnnotationTypePattern.read(s, context);
}
SignaturePattern ret = new SignaturePattern(kind, modifiers, returnType, declaringType, name, parameterTypes,
throwsPattern, annotationPattern);
ret.readLocation(context, s);
return ret;
}
/**
* @return
*/
public ModifiersPattern getModifiers() {
return modifiers;
}
/**
* @return
*/
public TypePatternList getParameterTypes() {
return parameterTypes;
}
/**
* @return
*/
public TypePattern getReturnType() {
return returnType;
}
/**
* @return
*/
public ThrowsPattern getThrowsPattern() {
return throwsPattern;
}
/**
* return true if last argument in params is an Object[] but the modifiers say this method was declared with varargs
* (Object...). We shouldn't be matching if this is the case.
*/
// private boolean matchedArrayAgainstVarArgs(TypePatternList params,int modifiers) {
// if (params.size()>0 && (modifiers & Constants.ACC_VARARGS)!=0) {
// // we have at least one parameter in the pattern list, and the method has a varargs signature
// TypePattern lastPattern = params.get(params.size()-1);
// if (lastPattern.isArray() && !lastPattern.isVarArgs) return true;
// }
// return false;
// }
public AnnotationTypePattern getAnnotationPattern() {
return annotationPattern;
}
public boolean isStarAnnotation() {
return annotationPattern == AnnotationTypePattern.ANY;
}
@Override
public Object accept(PatternNodeVisitor visitor, Object data) {
return visitor.visit(this, data);
}
public boolean isExactDeclaringTypePattern() {
return isExactDeclaringTypePattern;
}
public boolean isMatchOnAnyName() {
return getName().isAny();
}
public List getExactDeclaringTypes() {
if (declaringType instanceof ExactTypePattern) {
List l = new ArrayList();
l.add((ExactTypePattern) declaringType);
return l;
} else {
return Collections.emptyList();
}
}
public boolean couldEverMatch(ResolvedType type) {
return declaringType.matches(type, TypePattern.STATIC).maybeTrue();
}
}
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