/*
* Copyright 2012, Thomas Kerber
*
* Licensed 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 milk.jpatch.classLevel;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import milk.jpatch.CPoolMap;
import milk.jpatch.Util;
import milk.jpatch.attribs.AttributesPatch;
import org.apache.bcel.classfile.Method;
import org.apache.bcel.classfile.Attribute;
/**
* Patch denoting a method being added/replaced.
* @author Thomas Kerber
* @version 1.0.0
*/
public class MethodAdd extends MethodPatch{
private static final long serialVersionUID = 205913088503784674L;
/**
* The method to add.
*/
private final Method m;
/**
* Creates.
* @param m The method to add.
*/
public MethodAdd(Method m){
super(Util.getMethodIdentifier(m));
this.m = m;
}
/**
* Generates.
* @param new_ The new method.
* @return The patch.
*/
public static MethodAdd generate(Method new_){
return new MethodAdd(new_);
}
/**
*
* @return The method this patch adds.
*/
public Method getMethod(){
return m;
}
@Override
public Method patch(Method m, CPoolMap map){
Method ret = this.m;
// A bit awkward, but the goal is to apply attribute patches even
// to replaced methods to avoid some bugs with invalid pc counts.
// Especially important is that a CodePatch is always applied.
Attribute[] attribs = ret.getAttributes();
// It should never happen that the map used in generation is accessed.
AttributesPatch ap = AttributesPatch.generate(new Attribute[0],
attribs, null);
List<Attribute> attribL = ap.patch(new ArrayList<Attribute>(
Arrays.asList(attribs)), map);
ret = map.applyTo(ret);
ret.setAttributes(attribL.toArray(new Attribute[attribL.size()]));
return ret;
}
}