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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.IMessage;
import org.aspectj.weaver.CompressingDataOutputStream;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.World;
public class DeclarePrecedence extends Declare {
private TypePatternList patterns;
private IScope scope = null; // non-null means it has not yet been resolved (used by annotation style lazy resolution)
public DeclarePrecedence(List patterns) {
this(new TypePatternList(patterns));
}
private DeclarePrecedence(TypePatternList patterns) {
this.patterns = patterns;
}
public Object accept(PatternNodeVisitor visitor, Object data) {
return visitor.visit(this, data);
}
public Declare parameterizeWith(Map typeVariableBindingMap, World w) {
DeclarePrecedence ret = new DeclarePrecedence(this.patterns.parameterizeWith(typeVariableBindingMap, w));
ret.copyLocationFrom(this);
return ret;
}
public String toString() {
StringBuffer buf = new StringBuffer();
buf.append("declare precedence: ");
buf.append(patterns);
buf.append(";");
return buf.toString();
}
public boolean equals(Object other) {
if (!(other instanceof DeclarePrecedence)) {
return false;
}
DeclarePrecedence o = (DeclarePrecedence) other;
return o.patterns.equals(patterns);
}
public int hashCode() {
return patterns.hashCode();
}
public void write(CompressingDataOutputStream s) throws IOException {
s.writeByte(Declare.DOMINATES);
patterns.write(s);
writeLocation(s);
}
public static Declare read(VersionedDataInputStream s, ISourceContext context) throws IOException {
Declare ret = new DeclarePrecedence(TypePatternList.read(s, context));
ret.readLocation(context, s);
return ret;
}
public void setScopeForResolution(IScope scope) {
this.scope = scope;
}
public void ensureResolved() { // Lazy resolution - due to pr256779
if (scope != null) {
try {
resolve(scope);
} finally {
scope = null;
}
}
}
public void resolve(IScope scope) {
patterns = patterns.resolveBindings(scope, Bindings.NONE, false, false);
boolean seenStar = false;
for (int i = 0; i < patterns.size(); i++) {
TypePattern pi = patterns.get(i);
if (pi.isStar()) {
if (seenStar) {
scope.getWorld().showMessage(IMessage.ERROR, WeaverMessages.format(WeaverMessages.TWO_STARS_IN_PRECEDENCE),
pi.getSourceLocation(), null);
}
seenStar = true;
continue;
}
ResolvedType exactType = pi.getExactType().resolve(scope.getWorld());
if (exactType.isMissing()) {
continue;
}
// Cannot do a dec prec specifying a non-aspect types unless suffixed with a '+'
if (!exactType.isAspect() && !exactType.isAnnotationStyleAspect() && !pi.isIncludeSubtypes()
&& !exactType.isTypeVariableReference()) {
scope.getWorld().showMessage(IMessage.ERROR,
WeaverMessages.format(WeaverMessages.CLASSES_IN_PRECEDENCE, exactType.getName()), pi.getSourceLocation(),
null);
}
for (int j = 0; j < patterns.size(); j++) {
if (j == i) {
continue;
}
TypePattern pj = patterns.get(j);
if (pj.isStar()) {
continue;
}
if (pj.matchesStatically(exactType)) {
scope.getWorld().showMessage(IMessage.ERROR,
WeaverMessages.format(WeaverMessages.TWO_PATTERN_MATCHES_IN_PRECEDENCE, exactType.getName()),
pi.getSourceLocation(), pj.getSourceLocation());
}
}
}
}
public TypePatternList getPatterns() {
ensureResolved();
return patterns;
}
private int matchingIndex(ResolvedType a) {
ensureResolved();
int knownMatch = -1;
int starMatch = -1;
for (int i = 0, len = patterns.size(); i < len; i++) {
TypePattern p = patterns.get(i);
if (p.isStar()) {
starMatch = i;
} else if (p.matchesStatically(a)) {
if (knownMatch != -1) {
a.getWorld().showMessage(IMessage.ERROR,
WeaverMessages.format(WeaverMessages.MULTIPLE_MATCHES_IN_PRECEDENCE, a, patterns.get(knownMatch), p),
patterns.get(knownMatch).getSourceLocation(), p.getSourceLocation());
return -1;
} else {
knownMatch = i;
}
}
}
if (knownMatch == -1) {
return starMatch;
} else {
return knownMatch;
}
}
public int compare(ResolvedType aspect1, ResolvedType aspect2) {
ensureResolved();
int index1 = matchingIndex(aspect1);
int index2 = matchingIndex(aspect2);
// System.out.println("a1: " + aspect1 + ", " + aspect2 + " = " + index1 + ", " + index2);
if (index1 == -1 || index2 == -1) {
return 0;
}
if (index1 == index2) {
return 0;
} else if (index1 > index2) {
return -1;
} else {
return +1;
}
}
public boolean isAdviceLike() {
return false;
}
public String getNameSuffix() {
return "precedence";
}
}
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