org.aspectj.weaver.bcel.TypeAnnotationAccessVar Maven / Gradle / Ivy
/* *******************************************************************
* Copyright (c) 2005 IBM
* 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:
* Andy Clement initial implementation
* ******************************************************************/
package org.aspectj.weaver.bcel;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.generic.Instruction;
import org.aspectj.apache.bcel.generic.InstructionFactory;
import org.aspectj.apache.bcel.generic.InstructionList;
import org.aspectj.apache.bcel.generic.ObjectType;
import org.aspectj.apache.bcel.generic.Type;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.UnresolvedType;
/**
* Used for @this() @target() @args() - represents accessing an annotated
* 'thing'. Main use is to create the instructions that retrieve the
* annotation from the 'thing' - see createLoadInstructions()
*/
public class TypeAnnotationAccessVar extends BcelVar {
private BcelVar target;
public TypeAnnotationAccessVar(ResolvedType type,BcelVar theAnnotatedTargetIsStoredHere) {
super(type,0);
target = theAnnotatedTargetIsStoredHere;
}
public String toString() {
return "TypeAnnotationAccessVar(" + getType() + ")";
}
public Instruction createLoad(InstructionFactory fact) {
throw new RuntimeException("unimplemented");
}
public Instruction createStore(InstructionFactory fact) {
throw new RuntimeException("unimplemented");
}
public InstructionList createCopyFrom(InstructionFactory fact, int oldSlot) {
throw new RuntimeException("unimplemented");
}
public void appendLoad(InstructionList il, InstructionFactory fact) {
il.append(createLoadInstructions(getType(), fact));
}
public InstructionList createLoadInstructions(ResolvedType toType, InstructionFactory fact) {
InstructionList il = new InstructionList();
Type jlClass = BcelWorld.makeBcelType(UnresolvedType.JAVA_LANG_CLASS);
Type jlaAnnotation = BcelWorld.makeBcelType(UnresolvedType.forSignature("Ljava.lang.annotation.Annotation;"));
il.append(target.createLoad(fact));
il.append(fact.createInvoke("java/lang/Object","getClass",jlClass,new Type[]{},Constants.INVOKEVIRTUAL));
il.append(fact.createConstant(new ObjectType(toType.getName())));
il.append(fact.createInvoke("java/lang/Class","getAnnotation",jlaAnnotation,new Type[]{jlClass},Constants.INVOKEVIRTUAL));
il.append(Utility.createConversion(fact,jlaAnnotation,BcelWorld.makeBcelType(toType)));
return il;
}
public void appendLoadAndConvert(
InstructionList il,
InstructionFactory fact,
ResolvedType toType) {
il.append(createLoadInstructions(toType, fact));
}
public void insertLoad(InstructionList il, InstructionFactory fact) {
il.insert(createLoadInstructions(getType(), fact));
}
}