/* Copyright (C) 2004-2007 Sami Koivu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.sf.rej.gui.action;
import net.sf.rej.gui.Undoable;
import net.sf.rej.java.attribute.Attributes;
import net.sf.rej.java.attribute.CodeAttribute;
import net.sf.rej.java.constantpool.ConstantPool;
public class CreateCodeAttributeAction implements Undoable {
private Attributes attrs;
private CodeAttribute codeAttr = null;
private ConstantPool cp;
private int oldPoolSize = -1;
public CreateCodeAttributeAction(Attributes attrs, ConstantPool cp) {
this.attrs = attrs;
this.cp = cp;
this.oldPoolSize = this.cp.size();
}
public void execute() {
if (this.codeAttr == null) {
int index = this.cp.optionalAddUtf8("Code");
this.codeAttr = new CodeAttribute(index, this.cp, 0, 0);
}
this.attrs.addAttribute(this.codeAttr);
}
public void undo() {
this.attrs.removeAttribute(this.codeAttr);
this.cp.shrinkToSize(this.oldPoolSize);
}
}