/*
* 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.code;
import milk.jpatch.CPoolMap;
import milk.jpatch.attribs.AttributesPatch;
import org.apache.bcel.classfile.Attribute;
import org.apache.bcel.classfile.Code;
/**
* Patch denoting the replacement of the code attribute.
* @author Thomas Kerber
* @version 1.0.0
*/
public class CodeReplace extends CodePatch{
private static final long serialVersionUID = -6529941890852822270L;
/**
* The code to replace with.
*
* Note the the attributes of this <strong>are ignored</strong>
*/
private Code replaceWith;
/**
* Creates.
* @param attribPatch The component attributes patch.
* @param replacer The replacement code object. The attributes of this are
* ignored.
*/
public CodeReplace(AttributesPatch attribPatch, Code replacer){
super(attribPatch);
// Attributes are stored seperately, so we may as well throw them out
// here.
replacer.setAttributes(new Attribute[0]);
replaceWith = replacer;
}
@Override
public Code patch(Code c, CPoolMap map){
Code newCode = map.applyTo(replaceWith, newCPs);
// Retain old attributes for now.
newCode.setAttributes(c.getAttributes());
// Set all old code CPs to 0.
for(CodePointHook cph : oldCPs)
cph.codePoint = 0;
return newCode;
}
}