/* 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.AccessFlags;
import net.sf.rej.java.ClassFile;
import net.sf.rej.java.Descriptor;
import net.sf.rej.java.Field;
import net.sf.rej.java.FieldFactory;
import net.sf.rej.java.constantpool.ConstantPool;
/**
* An <code>Undoable</code> action which adds a member field into a class.
*
* @author Sami Koivu
*/
public class InsertFieldAction implements Undoable {
private ClassFile cf;
private String fieldName;
private Descriptor desc;
private AccessFlags accessFlags;
private int createdNameIndex = -1;
private int createdDescIndex = -1;
private Field field = null;
private static FieldFactory fieldFactory = new FieldFactory();
public InsertFieldAction(ClassFile cf, String fieldName, Descriptor desc, AccessFlags accessFlags) {
this.cf = cf;
this.fieldName = fieldName;
this.desc = desc;
this.accessFlags = accessFlags;
}
public void execute() {
ConstantPool cp = this.cf.getPool();
int nameIndex = cp.indexOfUtf8(this.fieldName);
if (nameIndex == -1) {
nameIndex = cp.optionalAddUtf8(this.fieldName);
this.createdNameIndex = nameIndex;
}
int descIndex = cp.indexOfUtf8(this.desc.getRawDesc());
if (descIndex == -1) {
descIndex = cp.optionalAddUtf8(this.desc.getRawDesc());
this.createdDescIndex = descIndex;
}
this.field = fieldFactory.createField(this.cf, this.accessFlags, nameIndex, descIndex);
this.cf.add(this.field);
}
public void undo() {
this.cf.remove(this.field);
if (this.createdDescIndex != -1) {
this.cf.getPool().removeLast();
}
if (this.createdNameIndex != -1) {
this.cf.getPool().removeLast();
}
}
}