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/* *******************************************************************
* Copyright (c) 2005 IBM Corporation
* 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:
* Adrian Colyer initial implementation
* Andy Clement got it working
* ******************************************************************/
package org.aspectj.weaver.patterns;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import org.aspectj.bridge.MessageUtil;
import org.aspectj.weaver.AnnotationAJ;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.ResolvedMember;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.World;
public class DeclareAnnotation extends Declare {
public static final Kind AT_TYPE = new Kind(1, "type");
public static final Kind AT_FIELD = new Kind(2, "field");
public static final Kind AT_METHOD = new Kind(3, "method");
public static final Kind AT_CONSTRUCTOR = new Kind(4, "constructor");
private Kind kind;
private TypePattern typePattern; // for declare @type
private SignaturePattern sigPattern; // for declare
// @field,@method,@constructor
private String annotationMethod = "unknown";
private String annotationString = "@";
private ResolvedType containingAspect;
private AnnotationAJ annotation;
/**
* Captures type of declare annotation (method/type/field/constructor)
*/
public static class Kind {
private final int id;
private String s;
private Kind(int n, String name) {
id = n;
s = name;
}
public int hashCode() {
return (19 + 37 * id);
}
public boolean equals(Object obj) {
if (!(obj instanceof Kind))
return false;
Kind other = (Kind) obj;
return other.id == id;
}
public String toString() {
return "at_" + s;
}
}
public DeclareAnnotation(Kind kind, TypePattern typePattern) {
this.typePattern = typePattern;
this.kind = kind;
}
/**
* Returns the string, useful before the real annotation has been resolved
*/
public String getAnnotationString() {
return annotationString;
}
public DeclareAnnotation(Kind kind, SignaturePattern sigPattern) {
this.sigPattern = sigPattern;
this.kind = kind;
}
public boolean isExactPattern() {
return typePattern instanceof ExactTypePattern;
}
public String getAnnotationMethod() {
return annotationMethod;
}
public String toString() {
StringBuffer ret = new StringBuffer();
ret.append("declare @");
ret.append(kind);
ret.append(" : ");
ret.append(typePattern != null ? typePattern.toString() : sigPattern.toString());
ret.append(" : ");
ret.append(annotationString);
return ret.toString();
}
public Object accept(PatternNodeVisitor visitor, Object data) {
return visitor.visit(this, data);
}
public void resolve(IScope scope) {
if (!scope.getWorld().isInJava5Mode()) {
String msg = null;
if (kind == AT_TYPE) {
msg = WeaverMessages.DECLARE_ATTYPE_ONLY_SUPPORTED_AT_JAVA5_LEVEL;
} else if (kind == AT_METHOD) {
msg = WeaverMessages.DECLARE_ATMETHOD_ONLY_SUPPORTED_AT_JAVA5_LEVEL;
} else if (kind == AT_FIELD) {
msg = WeaverMessages.DECLARE_ATFIELD_ONLY_SUPPORTED_AT_JAVA5_LEVEL;
} else if (kind == AT_CONSTRUCTOR) {
msg = WeaverMessages.DECLARE_ATCONS_ONLY_SUPPORTED_AT_JAVA5_LEVEL;
}
scope.message(MessageUtil.error(WeaverMessages.format(msg), getSourceLocation()));
return;
}
if (typePattern != null) {
typePattern = typePattern.resolveBindings(scope, Bindings.NONE, false, false);
}
if (sigPattern != null) {
sigPattern = sigPattern.resolveBindings(scope, Bindings.NONE);
}
this.containingAspect = scope.getEnclosingType();
}
public Declare parameterizeWith(Map typeVariableBindingMap, World w) {
DeclareAnnotation ret;
if (this.kind == AT_TYPE) {
ret = new DeclareAnnotation(kind, this.typePattern.parameterizeWith(typeVariableBindingMap, w));
} else {
ret = new DeclareAnnotation(kind, this.sigPattern.parameterizeWith(typeVariableBindingMap, w));
}
ret.annotationMethod = this.annotationMethod;
ret.annotationString = this.annotationString;
ret.containingAspect = this.containingAspect;
ret.annotation = this.annotation;
ret.copyLocationFrom(this);
return ret;
}
public boolean isAdviceLike() {
return false;
}
public void setAnnotationString(String as) {
this.annotationString = as;
}
public void setAnnotationMethod(String methName) {
this.annotationMethod = methName;
}
public boolean equals(Object obj) {
if (!(obj instanceof DeclareAnnotation))
return false;
DeclareAnnotation other = (DeclareAnnotation) obj;
if (!this.kind.equals(other.kind))
return false;
if (!this.annotationString.equals(other.annotationString))
return false;
if (!this.annotationMethod.equals(other.annotationMethod))
return false;
if (this.typePattern != null) {
if (!typePattern.equals(other.typePattern))
return false;
}
if (this.sigPattern != null) {
if (!sigPattern.equals(other.sigPattern))
return false;
}
return true;
}
public int hashCode() {
int result = 19;
result = 37 * result + kind.hashCode();
result = 37 * result + annotationString.hashCode();
result = 37 * result + annotationMethod.hashCode();
if (typePattern != null)
result = 37 * result + typePattern.hashCode();
if (sigPattern != null)
result = 37 * result + sigPattern.hashCode();
return result;
}
/*
* (non-Javadoc)
*
* @see org.aspectj.weaver.patterns.PatternNode#write(java.io.DataOutputStream)
*/
public void write(DataOutputStream s) throws IOException {
s.writeByte(Declare.ANNOTATION);
s.writeInt(kind.id);
s.writeUTF(annotationString);
s.writeUTF(annotationMethod);
if (typePattern != null)
typePattern.write(s);
if (sigPattern != null)
sigPattern.write(s);
writeLocation(s);
}
public static Declare read(VersionedDataInputStream s, ISourceContext context) throws IOException {
DeclareAnnotation ret = null;
int kind = s.readInt();
String annotationString = s.readUTF();
String annotationMethod = s.readUTF();
TypePattern tp = null;
SignaturePattern sp = null;
switch (kind) {
case 1:
tp = TypePattern.read(s, context);
ret = new DeclareAnnotation(AT_TYPE, tp);
break;
case 2:
sp = SignaturePattern.read(s, context);
ret = new DeclareAnnotation(AT_FIELD, sp);
break;
case 3:
sp = SignaturePattern.read(s, context);
ret = new DeclareAnnotation(AT_METHOD, sp);
break;
case 4:
sp = SignaturePattern.read(s, context);
ret = new DeclareAnnotation(AT_CONSTRUCTOR, sp);
break;
}
// if (kind==AT_TYPE.id) {
// tp = TypePattern.read(s,context);
// ret = new DeclareAnnotation(AT_TYPE,tp);
// } else {
// sp = SignaturePattern.read(s,context);
// ret = new DeclareAnnotation(kind,sp);
// }
ret.setAnnotationString(annotationString);
ret.setAnnotationMethod(annotationMethod);
ret.readLocation(context, s);
return ret;
}
// public boolean getAnnotationIfMatches(ResolvedType onType) {
// return (match(onType));
// }
/**
* For @constructor, @method, @field
*/
public boolean matches(ResolvedMember rm, World world) {
return sigPattern.matches(rm, world, false);
}
/**
* For @type
*/
public boolean matches(ResolvedType typeX) {
if (!typePattern.matchesStatically(typeX))
return false;
if (typeX.getWorld().getLint().typeNotExposedToWeaver.isEnabled() && !typeX.isExposedToWeaver()) {
typeX.getWorld().getLint().typeNotExposedToWeaver.signal(typeX.getName(), getSourceLocation());
}
return true;
}
public void setAspect(ResolvedType typeX) {
containingAspect = typeX;
}
public UnresolvedType getAspect() {
return containingAspect;
}
public void copyAnnotationTo(ResolvedType onType) {
ensureAnnotationDiscovered();
if (!onType.hasAnnotation(annotation.getType())) {
onType.addAnnotation(annotation);
}
}
public AnnotationAJ getAnnotationX() {
ensureAnnotationDiscovered();
return annotation;
}
/**
* The annotation specified in the declare @type is stored against a simple method of the form "ajc$declare_", this method
* finds that method and retrieves the annotation
*/
private void ensureAnnotationDiscovered() {
if (annotation != null)
return;
for (Iterator iter = containingAspect.getMethods(); iter.hasNext();) {
ResolvedMember member = (ResolvedMember) iter.next();
if (member.getName().equals(annotationMethod)) {
AnnotationAJ[] annos = member.getAnnotations();
if (annos == null) {
// if weaving broken code, this can happen
return;
}
annotation = annos[0];
}
}
}
public TypePattern getTypePattern() {
return typePattern;
}
public SignaturePattern getSignaturePattern() {
return sigPattern;
}
public boolean isStarredAnnotationPattern() {
if (typePattern != null)
return typePattern.isStarAnnotation();
if (sigPattern != null)
return sigPattern.isStarAnnotation();
throw new RuntimeException("Impossible! what kind of deca is this: " + this);
}
public Kind getKind() {
return kind;
}
public boolean isDeclareAtConstuctor() {
return kind.equals(AT_CONSTRUCTOR);
}
public boolean isDeclareAtMethod() {
return kind.equals(AT_METHOD);
}
public boolean isDeclareAtType() {
return kind.equals(AT_TYPE);
}
public boolean isDeclareAtField() {
return kind.equals(AT_FIELD);
}
/**
* @return UnresolvedType for the annotation
*/
public UnresolvedType getAnnotationTypeX() {
ensureAnnotationDiscovered();
return (this.annotation == null ? null : this.annotation.getType());
}
/**
* @return true if the annotation specified is allowed on a field
*/
public boolean isAnnotationAllowedOnField() {
ensureAnnotationDiscovered();
return annotation.allowedOnField();
}
public String getPatternAsString() {
if (sigPattern != null)
return sigPattern.toString();
if (typePattern != null)
return typePattern.toString();
return "DONT KNOW";
}
/**
* Return true if this declare annotation could ever match something in the specified type - only really able to make
* intelligent decision if a type was specified in the sig/type pattern signature.
*/
public boolean couldEverMatch(ResolvedType type) {
// Haven't implemented variant for typePattern (doesn't seem worth it!)
// BUGWARNING This test might not be sufficient for funny cases relating
// to interfaces and the use of '+' - but it seems really important to
// do something here so we don't iterate over all fields and all methods
// in all types exposed to the weaver! So look out for bugs here and
// we can update the test as appropriate.
if (sigPattern != null)
return sigPattern.getDeclaringType().matches(type, TypePattern.STATIC).maybeTrue();
return true;
}
/**
* Provide a name suffix so that we can tell the different declare annotations forms apart in the AjProblemReporter
*/
public String getNameSuffix() {
return getKind().toString();
}
}
