/******************************************************************************* | |
* Copyright (c) 2008, 2012 Intel Corporation. | |
* All rights reserved. This program and the accompanying materials | |
* are made available under the terms of the Eclipse Public License 2.0 | |
* which accompanies this distribution, and is available at | |
* https://www.eclipse.org/legal/epl-2.0/ | |
* | |
* SPDX-License-Identifier: EPL-2.0 | |
* | |
* Contributors: | |
* Oleg Danilov, Intel - Initial API and Implementation | |
* | |
*******************************************************************************/ | |
package org.eclipse.bpel.ui.commands; | |
import java.util.Collections; | |
import java.util.List; | |
import org.eclipse.bpel.ui.commands.util.AutoUndoCommand; | |
import org.eclipse.emf.ecore.EObject; | |
/** | |
* Subclasses of this command swap a model objects in a list in a target model | |
* object. | |
*/ | |
public abstract class SwapInListCommand extends AutoUndoCommand { | |
protected EObject target; | |
private int firstNo; | |
private int secondNo; | |
public SwapInListCommand(EObject target, int firstElement, int secondElement, String cmdLabel) { | |
super(cmdLabel, target); | |
this.target = target; | |
if (firstElement < secondElement){ | |
this.firstNo = firstElement; | |
this.secondNo = secondElement; | |
} else { | |
this.firstNo = secondElement; | |
this.secondNo = firstElement; | |
} | |
} | |
/** | |
* Subclasses should override this to return the intended list from target. | |
*/ | |
@SuppressWarnings("unchecked") | |
protected abstract List getList(); | |
@SuppressWarnings("unchecked") | |
@Override | |
public void doExecute() { | |
List list = getList(); | |
if (list == null || list.isEmpty()) | |
throw new IllegalStateException(); | |
Object first = list.get(firstNo); | |
Object second = list.get(secondNo); | |
list.remove(secondNo); | |
list.remove(firstNo); | |
list.add(firstNo, second); | |
list.add(secondNo, first); | |
} | |
} |