// $Id: UMLAssociationRoleBaseComboBoxModel.java,v 1.15 2004/09/22 17:55:56 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
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package org.argouml.uml.ui.behavior.collaborations;

import org.argouml.model.ModelFacade;
import org.argouml.model.uml.UmlModelEventPump;
import org.argouml.model.uml.behavioralelements.collaborations.CollaborationsHelper;
import org.argouml.uml.ui.UMLComboBoxModel2;

/**
 * @since Oct 4, 2002
 * @author jaap.branderhorst@xs4all.nl
 */
public class UMLAssociationRoleBaseComboBoxModel extends UMLComboBoxModel2 {

    /**
     * Constructor for UMLAssociationRoleBaseComboBoxModel.
     */
    public UMLAssociationRoleBaseComboBoxModel() {
        super("base", true);
        UmlModelEventPump.getPump().addClassModelEventListener(this, 
                (Class) ModelFacade.NAMESPACE, "ownedElement");
    }

    /**
     * @see org.argouml.uml.ui.UMLComboBoxModel2#buildModelList()
     */
    protected void buildModelList() {
        setElements(CollaborationsHelper.getHelper().getAllPossibleBases(
                /*(MAssociationRole)*/ getTarget())); 
    }

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

    /**
     * @see org.argouml.uml.ui.UMLComboBoxModel2#isValidElement(Object)
     */
    protected boolean isValidElement(Object element) {
        return CollaborationsHelper.getHelper().getAllPossibleBases(
                /*(MAssociationRole)*/ getTarget()).contains(element);
    }

}