/*******************************************************************************
* Copyright (c) 2012 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* tware - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.internal.jpa.weaving;
import org.eclipse.persistence.dynamic.DynamicClassLoader;
import org.eclipse.persistence.dynamic.EclipseLinkClassWriter;
import org.eclipse.persistence.internal.libraries.asm.ClassWriter;
import org.eclipse.persistence.internal.libraries.asm.MethodVisitor;
import org.eclipse.persistence.internal.libraries.asm.Opcodes;
public class RestAdapterClassWriter implements EclipseLinkClassWriter, Opcodes {
public static final String REFERENCE_ADAPTER_SHORT_SIGNATURE = "org/eclipse/persistence/jpa/rs/util/ReferenceAdapter";
/**
* creates a class name that can be used for a ReferenceAdapter subclass for the given
* classname.
* @param className
* @return
*/
public static String constructClassNameForReferenceAdapter(String className){
String packageName = className.lastIndexOf('.') >= 0 ? className.substring(0, className.lastIndexOf('.')) : "";
String shortClassName = className.lastIndexOf('.') >= 0 ? className.substring(className.lastIndexOf('.') + 1) : className;
return packageName + "._" + shortClassName + "PersistenceRestAdapter";
}
protected String parentClassName;
public RestAdapterClassWriter(String parentClassName){
this.parentClassName = parentClassName;
}
public String getClassName(){
return constructClassNameForReferenceAdapter(parentClassName);
}
public String getASMParentClassName(){
return parentClassName.replace('.', '/');
}
public String getASMClassName(){
return getClassName().replace('.', '/');
}
@Override
public byte[] writeClass(DynamicClassLoader loader, String className)
throws ClassNotFoundException {
ClassWriter cw = new ClassWriter(0);
cw.visit(V1_6, ACC_PUBLIC + ACC_SUPER, getASMClassName(), "L" + REFERENCE_ADAPTER_SHORT_SIGNATURE + "<L" + getASMParentClassName() + ";>;", REFERENCE_ADAPTER_SHORT_SIGNATURE, null);
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, REFERENCE_ADAPTER_SHORT_SIGNATURE, "<init>", "()V");
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "(Ljava/lang/String;Lorg/eclipse/persistence/jpa/rs/PersistenceContext;)V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 2);
mv.visitMethodInsn(INVOKESPECIAL, REFERENCE_ADAPTER_SHORT_SIGNATURE, "<init>", "(Ljava/lang/String;Lorg/eclipse/persistence/jpa/rs/PersistenceContext;)V");
mv.visitInsn(RETURN);
mv.visitMaxs(3, 3);
mv.visitEnd();
cw.visitEnd();
return cw.toByteArray();
}
@Override
public boolean isCompatible(EclipseLinkClassWriter writer) {
return getParentClassName().equals(writer.getParentClassName());
}
@Override
public Class<?> getParentClass() {
return null;
}
@Override
public String getParentClassName() {
return parentClassName;
}
}