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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:
* Adrian Colyer Initial implementation
* Nieraj Singh
* ******************************************************************/
package org.aspectj.weaver.patterns;
import java.io.IOException;
import java.lang.reflect.Modifier;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.aspectj.bridge.IMessage;
import org.aspectj.util.FuzzyBoolean;
import org.aspectj.weaver.CompressingDataOutputStream;
import org.aspectj.weaver.ConcreteTypeMunger;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.Member;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.World;
/**
* @author colyer Matches types that have a certain method / constructor / field Currently only allowed within declare parents and
* declare @type
*/
public class HasMemberTypePattern extends TypePattern {
private SignaturePattern signaturePattern;
public HasMemberTypePattern(SignaturePattern aSignaturePattern) {
super(false, false);
this.signaturePattern = aSignaturePattern;
}
@Override
protected boolean matchesExactly(ResolvedType type) {
if (signaturePattern.getKind() == Member.FIELD) {
return hasField(type);
} else {
return hasMethod(type);
}
}
public ISignaturePattern getSignaturePattern() {
return signaturePattern;
}
private final static String declareAtPrefix = "ajc$declare_at";
private boolean hasField(ResolvedType type) {
// TODO what about ITDs
World world = type.getWorld();
for (Iterator iter = type.getFields(); iter.hasNext();) {
Member field = (Member) iter.next();
if (field.getName().startsWith(declareAtPrefix)) {
continue;
}
if (signaturePattern.matches(field, type.getWorld(), false)) {
if (field.getDeclaringType().resolve(world) != type) {
if (Modifier.isPrivate(field.getModifiers())) {
continue;
}
}
return true;
}
}
return false;
}
private boolean hasMethod(ResolvedType type) {
// TODO what about ITDs
World world = type.getWorld();
for (Iterator iter = type.getMethods(true, true); iter.hasNext();) {
Member method = (Member) iter.next();
if (method.getName().startsWith(declareAtPrefix)) {
continue;
}
if (signaturePattern.matches(method, type.getWorld(), false)) {
if (method.getDeclaringType().resolve(world) != type) {
if (Modifier.isPrivate(method.getModifiers())) {
continue;
}
}
return true;
}
}
// try itds before we give up
List<ConcreteTypeMunger> mungers = type.getInterTypeMungersIncludingSupers();
for (Iterator<ConcreteTypeMunger> iter = mungers.iterator(); iter.hasNext();) {
ConcreteTypeMunger munger = iter.next();
Member member = munger.getSignature();
if (signaturePattern.matches(member, type.getWorld(), false)) {
if (!Modifier.isPublic(member.getModifiers())) {
continue;
}
return true;
}
}
return false;
}
@Override
protected boolean matchesExactly(ResolvedType type, ResolvedType annotatedType) {
return matchesExactly(type);
}
@Override
public FuzzyBoolean matchesInstanceof(ResolvedType type) {
throw new UnsupportedOperationException("hasmethod/field do not support instanceof matching");
}
@Override
public TypePattern parameterizeWith(Map typeVariableMap, World w) {
HasMemberTypePattern ret = new HasMemberTypePattern(signaturePattern.parameterizeWith(typeVariableMap, w));
ret.copyLocationFrom(this);
return ret;
}
@Override
public TypePattern resolveBindings(IScope scope, Bindings bindings, boolean allowBinding, boolean requireExactType) {
// check that hasmember type patterns are allowed!
if (!scope.getWorld().isHasMemberSupportEnabled()) {
String msg = WeaverMessages.format(WeaverMessages.HAS_MEMBER_NOT_ENABLED, this.toString());
scope.message(IMessage.ERROR, this, msg);
}
signaturePattern.resolveBindings(scope, bindings);
return this;
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof HasMemberTypePattern)) {
return false;
}
if (this == obj) {
return true;
}
return signaturePattern.equals(((HasMemberTypePattern) obj).signaturePattern);
}
@Override
public int hashCode() {
return signaturePattern.hashCode();
}
@Override
public String toString() {
StringBuffer buff = new StringBuffer();
if (signaturePattern.getKind() == Member.FIELD) {
buff.append("hasfield(");
} else {
buff.append("hasmethod(");
}
buff.append(signaturePattern.toString());
buff.append(")");
return buff.toString();
}
@Override
public void write(CompressingDataOutputStream s) throws IOException {
s.writeByte(TypePattern.HAS_MEMBER);
signaturePattern.write(s);
writeLocation(s);
}
public static TypePattern read(VersionedDataInputStream s, ISourceContext context) throws IOException {
SignaturePattern sp = SignaturePattern.read(s, context);
HasMemberTypePattern ret = new HasMemberTypePattern(sp);
ret.readLocation(context, s);
return ret;
}
@Override
public Object accept(PatternNodeVisitor visitor, Object data) {
return visitor.visit(this, data);
}
}
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