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/* *******************************************************************
* Copyright (c) 2002, 2010 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
* Nieraj Singh
* ******************************************************************/
package org.aspectj.weaver.patterns;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import org.aspectj.bridge.MessageUtil;
import org.aspectj.util.FuzzyBoolean;
import org.aspectj.weaver.BCException;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.IntMap;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.TypeVariableReference;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.World;
/**
* On creation, type pattern only contains WildTypePattern nodes, not BindingType or ExactType.
*
*
* Then we call resolveBindings() during compilation During concretization of enclosing pointcuts, we call remapAdviceFormals
*
* @author Erik Hilsdale
* @author Jim Hugunin
*/
public abstract class TypePattern extends PatternNode {
public static class MatchKind {
private String name;
public MatchKind(String name) {
this.name = name;
}
@Override
public String toString() {
return name;
}
}
public static final MatchKind STATIC = new MatchKind("STATIC");
public static final MatchKind DYNAMIC = new MatchKind("DYNAMIC");
public static final TypePattern ELLIPSIS = new EllipsisTypePattern();
public static final TypePattern ANY = new AnyTypePattern();
public static final TypePattern NO = new NoTypePattern();
protected boolean includeSubtypes;
protected boolean isVarArgs = false;
protected AnnotationTypePattern annotationPattern = AnnotationTypePattern.ANY;
protected TypePatternList typeParameters = TypePatternList.EMPTY;
protected TypePattern(boolean includeSubtypes, boolean isVarArgs, TypePatternList typeParams) {
this.includeSubtypes = includeSubtypes;
this.isVarArgs = isVarArgs;
this.typeParameters = (typeParams == null ? TypePatternList.EMPTY : typeParams);
}
protected TypePattern(boolean includeSubtypes, boolean isVarArgs) {
this(includeSubtypes, isVarArgs, null);
}
public AnnotationTypePattern getAnnotationPattern() {
return annotationPattern;
}
public boolean isVarArgs() {
return isVarArgs;
}
public boolean isStarAnnotation() {
return annotationPattern == AnnotationTypePattern.ANY;
}
public boolean isArray() {
return false;
}
protected TypePattern(boolean includeSubtypes) {
this(includeSubtypes, false);
}
public void setAnnotationTypePattern(AnnotationTypePattern annPatt) {
this.annotationPattern = annPatt;
}
public void setTypeParameters(TypePatternList typeParams) {
this.typeParameters = typeParams;
}
public TypePatternList getTypeParameters() {
return this.typeParameters;
}
public void setIsVarArgs(boolean isVarArgs) {
this.isVarArgs = isVarArgs;
}
// answer conservatively...
protected boolean couldEverMatchSameTypesAs(TypePattern other) {
if (this.includeSubtypes || other.includeSubtypes) {
return true;
}
if (this.annotationPattern != AnnotationTypePattern.ANY) {
return true;
}
if (other.annotationPattern != AnnotationTypePattern.ANY) {
return true;
}
return false;
}
// XXX non-final for Not, && and ||
public boolean matchesStatically(ResolvedType type) {
if (includeSubtypes) {
return matchesSubtypes(type);
} else {
return matchesExactly(type);
}
}
public abstract FuzzyBoolean matchesInstanceof(ResolvedType type);
public final FuzzyBoolean matches(ResolvedType type, MatchKind kind) {
// FuzzyBoolean typeMatch = null;
// ??? This is part of gracefully handling missing references
if (type.isMissing()) {
return FuzzyBoolean.NO;
}
if (kind == STATIC) {
return FuzzyBoolean.fromBoolean(matchesStatically(type));
} else if (kind == DYNAMIC) {
// System.err.println("matching: " + this + " with " + type);
// typeMatch = matchesInstanceof(type);
// System.err.println(" got: " + ret);
// return typeMatch.and(annotationPattern.matches(type));
return matchesInstanceof(type);
} else {
throw new IllegalArgumentException("kind must be DYNAMIC or STATIC");
}
}
protected abstract boolean matchesExactly(ResolvedType type);
protected abstract boolean matchesExactly(ResolvedType type, ResolvedType annotatedType);
protected boolean matchesSubtypes(ResolvedType type) {
// System.out.println("matching: " + this + " to " + type);
if (matchesExactly(type)) {
return true;
}
// pr124808
Iterator typesIterator = null;
if (type.isTypeVariableReference()) {
typesIterator = ((TypeVariableReference) type).getTypeVariable().getFirstBound().resolve(type.getWorld())
.getDirectSupertypes();
} else {
// pr223605
if (type.isRawType()) {
type = type.getGenericType();
}
typesIterator = type.getDirectSupertypes();
}
for (Iterator i = typesIterator; i.hasNext();) {
ResolvedType superType = i.next();
if (matchesSubtypes(superType, type)) {
return true;
}
}
return false;
}
protected boolean matchesSubtypes(ResolvedType superType, ResolvedType annotatedType) {
// System.out.println("matching2: " + this + " to " + superType);
if (matchesExactly(superType, annotatedType)) {
// System.out.println(" true");
return true;
}
// If an ITD is applied, it will be put onto the generic type, not the parameterized or raw form
if (superType.isParameterizedType() || superType.isRawType()) {
superType = superType.getGenericType();
}
// FuzzyBoolean ret = FuzzyBoolean.NO; // ??? -eh
for (Iterator i = superType.getDirectSupertypes(); i.hasNext();) {
ResolvedType superSuperType = (ResolvedType) i.next();
if (matchesSubtypes(superSuperType, annotatedType)) {
return true;
}
}
return false;
}
public UnresolvedType resolveExactType(IScope scope, Bindings bindings) {
TypePattern p = resolveBindings(scope, bindings, false, true);
if (!(p instanceof ExactTypePattern)) {
return ResolvedType.MISSING;
}
return ((ExactTypePattern) p).getType();
}
public UnresolvedType getExactType() {
if (this instanceof ExactTypePattern) {
return ((ExactTypePattern) this).getType();
} else {
return ResolvedType.MISSING;
}
}
protected TypePattern notExactType(IScope s) {
s.getMessageHandler().handleMessage(
MessageUtil.error(WeaverMessages.format(WeaverMessages.EXACT_TYPE_PATTERN_REQD), getSourceLocation()));
return NO;
}
// public boolean assertExactType(IMessageHandler m) {
// if (this instanceof ExactTypePattern) return true;
//
// //XXX should try harder to avoid multiple errors for one problem
// m.handleMessage(MessageUtil.error("exact type pattern required", getSourceLocation()));
// return false;
// }
/**
* This can modify in place, or return a new TypePattern if the type changes.
*/
public TypePattern resolveBindings(IScope scope, Bindings bindings, boolean allowBinding, boolean requireExactType) {
annotationPattern = annotationPattern.resolveBindings(scope, bindings, allowBinding);
return this;
}
public void resolve(World world) {
annotationPattern.resolve(world);
}
/**
* return a version of this type pattern in which all type variable references have been replaced by their corresponding entry
* in the map.
*/
public abstract TypePattern parameterizeWith(Map typeVariableMap, World w);
public void postRead(ResolvedType enclosingType) {
}
public boolean isEllipsis() {
return false;
}
public boolean isStar() {
return false;
}
/**
* This is called during concretization of pointcuts, it is used by BindingTypePattern to return a new BindingTypePattern with a
* formal index appropiate for the advice, rather than for the lexical declaration, i.e. this handles transforamtions through
* named pointcuts.
*
*
* pointcut foo(String name): args(name);
* --> This makes a BindingTypePattern(0) pointing to the 0th formal
*
* before(Foo f, String n): this(f) && foo(n) { ... }
* --> when resolveReferences is called on the args from the above, it
* will return a BindingTypePattern(1)
*
* before(Foo f): this(f) && foo(*) { ... }
* --> when resolveReferences is called on the args from the above, it
* will return an ExactTypePattern(String)
*
*/
public TypePattern remapAdviceFormals(IntMap bindings) {
return this;
}
public static final byte WILD = 1;
public static final byte EXACT = 2;
public static final byte BINDING = 3;
public static final byte ELLIPSIS_KEY = 4;
public static final byte ANY_KEY = 5;
public static final byte NOT = 6;
public static final byte OR = 7;
public static final byte AND = 8;
public static final byte NO_KEY = 9;
public static final byte ANY_WITH_ANNO = 10;
public static final byte HAS_MEMBER = 11;
public static final byte TYPE_CATEGORY = 12;
public static TypePattern read(VersionedDataInputStream s, ISourceContext context) throws IOException {
byte key = s.readByte();
switch (key) {
case WILD:
return WildTypePattern.read(s, context);
case EXACT:
return ExactTypePattern.read(s, context);
case BINDING:
return BindingTypePattern.read(s, context);
case ELLIPSIS_KEY:
return ELLIPSIS;
case ANY_KEY:
return ANY;
case NO_KEY:
return NO;
case NOT:
return NotTypePattern.read(s, context);
case OR:
return OrTypePattern.read(s, context);
case AND:
return AndTypePattern.read(s, context);
case ANY_WITH_ANNO:
return AnyWithAnnotationTypePattern.read(s, context);
case HAS_MEMBER:
return HasMemberTypePattern.read(s, context);
case TYPE_CATEGORY:
return TypeCategoryTypePattern.read(s, context);
}
throw new BCException("unknown TypePattern kind: " + key);
}
public boolean isIncludeSubtypes() {
return includeSubtypes;
}
/**
* For quickly recognizing the pattern '!void'
*/
public boolean isBangVoid() {
return false;
}
/**
* for quickly recognizing the pattern 'void'
*/
public boolean isVoid() {
return false;
}
public boolean hasFailedResolution() {
return false;
}
}