/* $Id: ActionNewGuard.java 17894 2010-01-12 21:29:01Z linus $
*****************************************************************************
* Copyright (c) 2009 Contributors - see below
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* tfmorris
*****************************************************************************
*
* Some portions of this file was previously release using the BSD License:
*/
// Copyright (c) 1996-2006 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies. This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason. IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
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// $header$
package org.argouml.uml.ui.behavior.state_machines;
import java.awt.event.ActionEvent;
import org.argouml.model.Model;
import org.argouml.ui.targetmanager.TargetManager;
import org.argouml.uml.ui.AbstractActionNewModelElement;
/**
* The action to create a new Guard for a Transition. <p>
*
* This action is (currently) not fit to create a guard for a transition
* that already has one! If this functionality is needed, then
* the old guard should be deleted before making a new one.
*
* @since Dec 15, 2002
* @author jaap.branderhorst@xs4all.nl
*/
public class ActionNewGuard extends AbstractActionNewModelElement {
private static ActionNewGuard singleton = new ActionNewGuard();
/**
* Constructor for ActionNewCallAction.
*/
protected ActionNewGuard() {
super();
}
/*
* @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
*/
public void actionPerformed(ActionEvent e) {
super.actionPerformed(e);
TargetManager.getInstance().setTarget(
Model.getStateMachinesFactory().buildGuard(getTarget()));
}
/**
* @return Returns the singleton.
*/
public static ActionNewGuard getSingleton() {
return singleton;
}
/*
* @see javax.swing.Action#isEnabled()
*/
public boolean isEnabled() {
Object t = getTarget();
return t != null
&& Model.getFacade().getGuard(t) == null;
}
}