/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
package com.github.dcevm;
import org.objectweb.asm.*;
import org.objectweb.asm.commons.Remapper;
import org.objectweb.asm.commons.RemappingAnnotationAdapter;
import org.objectweb.asm.commons.RemappingClassAdapter;
import org.objectweb.asm.commons.RemappingMethodAdapter;
import java.util.Map;
/**
* @author Ivan Dubrov
*/
public class TestClassAdapter extends RemappingClassAdapter {
/**
* This suffix is automatically removed from the method.
*/
private final static String METHOD_SUFFIX = "___";
private boolean isObject;
public TestClassAdapter(ClassVisitor cv, final Map<String, String> typeMappings) {
super(cv, new Remapper() {
@Override
public String map(String type) {
return typeMappings.containsKey(type) ? typeMappings.get(type) : type;
}
});
}
@Override
public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
// For java/lang/Object redefinition
String newName = remapper.mapType(name);
if (newName.equals("java/lang/Object")) {
superName = null;
isObject = true;
}
super.visit(version, access, name, signature, superName, interfaces);
}
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
return super.visitMethod(access, stripMethodSuffix(name), desc, signature, exceptions);
}
/**
* Get renamed class name.
*
* @return
*/
public String getClassName() {
return remapper.mapType(className);
}
protected MethodVisitor createRemappingMethodAdapter(
int access,
String newDesc,
MethodVisitor mv) {
return new RemappingMethodAdapter(access, newDesc, mv, remapper) {
@Override
public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) {
if (name.equals("<init>") && isObject && owner.equals("java/lang/Object")) {
return;
}
super.visitMethodInsn(opcode, owner, stripMethodSuffix(name), desc, itf);
}
};
}
private static String stripMethodSuffix(String name) {
int pos = name.indexOf(METHOD_SUFFIX);
return (pos != -1) ? name.substring(0, pos) : name;
}
@Override
public AnnotationVisitor visitAnnotation(final String desc, final boolean visible) {
AnnotationVisitor av = super.visitAnnotation(remapper.mapDesc(desc), visible);
return av == null ? null : new RemappingAnnotationAdapter(av, remapper) {
@Override
public void visitEnum(String name, String enumDesc, String value) {
if (Type.getType(enumDesc).getClassName().equals(RedefinitionPolicy.class.getName())) {
RedefinitionPolicy valueAsEnum = RedefinitionPolicy.valueOf(value);
if (Type.getType(desc).getClassName().equals(FieldRedefinitionPolicy.class.getName())) {
cv.visitAttribute(new SingleByteAttribute(FieldRedefinitionPolicy.class.getSimpleName(), (byte) valueAsEnum.ordinal()));
}
if (Type.getType(desc).getClassName().equals(MethodRedefinitionPolicy.class.getName())) {
cv.visitAttribute(new SingleByteAttribute(MethodRedefinitionPolicy.class.getSimpleName(), (byte) valueAsEnum.ordinal()));
}
}
super.visitEnum(name, desc, value);
}
};
}
private static class SingleByteAttribute extends Attribute {
private byte value;
public SingleByteAttribute(String name, byte value) {
super(name);
this.value = value;
}
@Override
protected ByteVector write(ClassWriter writer, byte[] code, int len, int maxStack, int maxLocals) {
return new ByteVector().putByte(value);
}
}
}