/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you under the Apache License, Version 2.0 (the | |
* "License"); you may not use this file except in compliance | |
* with the License. You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, | |
* software distributed under the License is distributed on an | |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
* KIND, either express or implied. See the License for the | |
* specific language governing permissions and limitations | |
* under the License. | |
*/ | |
package org.apache.aries.proxy.impl.weaving; | |
import java.lang.reflect.Modifier; | |
import org.objectweb.asm.FieldVisitor; | |
import org.objectweb.asm.Opcodes; | |
import org.objectweb.asm.Type; | |
import org.objectweb.asm.commons.SerialVersionUIDAdder; | |
import static org.objectweb.asm.Opcodes.ASM9; | |
class SyntheticSerialVerUIDAdder extends SerialVersionUIDAdder { | |
private WovenProxyAdapter wpa; | |
//copied from superclass, they are now private | |
/** | |
* Flag that indicates if we need to compute SVUID. | |
*/ | |
private boolean computeSVUID; | |
/** | |
* Set to true if the class already has SVUID. | |
*/ | |
private boolean hasSVUID; | |
public SyntheticSerialVerUIDAdder(WovenProxyAdapter cv) { | |
super(ASM9, cv); | |
wpa = cv; | |
} | |
// The following visit and visitField methods are workaround since ASM4 does not supply the javadoced method isHasSVUID() by mistake. | |
// When the method isHasSVUId() or similar methods available, we can remove the following two methods. | |
@Override | |
public void visit( | |
final int version, | |
final int access, | |
final String name, | |
final String signature, | |
final String superName, | |
final String[] interfaces) { | |
computeSVUID = (access & Opcodes.ACC_INTERFACE) == 0; | |
super.visit(version, access, name, signature, superName, interfaces); | |
} | |
@Override | |
public FieldVisitor visitField( | |
final int access, | |
final String name, | |
final String desc, | |
final String signature, | |
final Object value) { | |
if (computeSVUID) { | |
if ("serialVersionUID".equals(name) && Modifier.isFinal(access) && Modifier.isStatic(access) && Type.LONG_TYPE.equals(Type.getType(desc))) { | |
// since the class already has SVUID, we won't be computing it. | |
computeSVUID = false; | |
hasSVUID = true; | |
} | |
} | |
return super.visitField(access, name, desc, signature, value); | |
} | |
@Override | |
public void visitEnd() { | |
wpa.setSVUIDGenerated(!!!hasSVUID); | |
super.visitEnd(); | |
} | |
} |