// $Id: UMLSubmachineStateComboBoxModel.java,v 1.9 2004/09/22 17:55:54 mvw Exp $
// Copyright (c) 1996-2003 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
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
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package org.argouml.uml.ui.behavior.state_machines;

import org.argouml.model.ModelFacade;
import org.argouml.model.uml.behavioralelements.statemachines.StateMachinesHelper;
import org.argouml.uml.ui.UMLComboBoxModel2;

/**
 * @since Dec 15, 2002
 * @author jaap.branderhorst@xs4all.nl
 */
public class UMLSubmachineStateComboBoxModel extends UMLComboBoxModel2 {

    /**
     * Constructor for UMLSubmachineStateComboBoxModel.
     */
    public UMLSubmachineStateComboBoxModel() {
        super("submachine", true);
    }

    /**
     * @see org.argouml.uml.ui.UMLComboBoxModel2#isValidElement(Object)
     */
    protected boolean isValidElement(Object element) {
        return (org.argouml.model.ModelFacade.isAStateMachine(element) 
            && element != StateMachinesHelper.getHelper()
                .getStateMachine(getTarget()));
    }

    /**
     * @see org.argouml.uml.ui.UMLComboBoxModel2#buildModelList()
     */
    protected void buildModelList() {
        removeAllElements();
        setElements(StateMachinesHelper.getHelper()
                .getAllPossibleStatemachines(getTarget()));
    }

    /**
     * @see org.argouml.uml.ui.UMLComboBoxModel2#getSelectedModelElement()
     */
    protected Object getSelectedModelElement() {
        if (getTarget() != null) {
            return ModelFacade.getSubmachine(getTarget());
        }
        return null;
    }

}