/* 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.constantpool.ConstantPool;
import net.sf.rej.java.instruction.Instruction;
import net.sf.rej.java.instruction.Parameters;
// TODO: this class is too complicated -- do something about it
public class AddMethodRefAction implements Undoable {
private String className;
private String methodName;
private String typeName;
private Instruction instruction;
private int paramIndex;
private ConstantPool pool;
private int createdNameAndTypeIndex = -1;
private int createdClassIndex = -1;
private int createdRefIndex = -1;
private int originalParamValue = -1;
public AddMethodRefAction(String className, String methodName, String typeName, Instruction instruction, int i, ConstantPool pool) {
this.className = className;
this.methodName = methodName;
this.typeName = typeName;
this.instruction = instruction;
this.paramIndex = i;
this.pool = pool;
}
public void execute() {
int index = this.pool.indexOfNameAndTypeRef(this.methodName, this.typeName);
if (index == -1) {
this.createdNameAndTypeIndex = this.pool.optionalAddNameAndTypeRef(this.methodName, this.typeName);
}
index = this.pool.indexOfClassRef(this.className);
if (index == -1) {
this.createdClassIndex = this.pool.optionalAddClassRef(this.className);
}
index = this.pool.indexOfMethodRef(this.className, this.methodName, this.typeName);
if (index == -1) {
this.createdRefIndex = this.pool.optionalAddMethodRef(this.className, this.methodName, this.typeName);
index = this.createdRefIndex;
}
Parameters params = this.instruction.getParameters();
this.originalParamValue = params.getInt(this.paramIndex);
params.setValue(this.paramIndex, Integer.valueOf(index));
this.instruction.setParameters(params);
}
public void undo() {
if (this.createdRefIndex != -1) {
this.pool.removeLast();
}
if (this.createdClassIndex != -1) {
this.pool.removeLast();
}
if (this.createdNameAndTypeIndex != -1) {
this.pool.removeLast();
}
Parameters params = this.instruction.getParameters();
params.setValue(this.paramIndex, Integer.valueOf(this.originalParamValue));
this.instruction.setParameters(params);
}
}