/* $Id: UMLMessagePredecessorListModel.java 17896 2010-01-12 21:36:11Z 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:
 *    bobtarling
 *****************************************************************************
 *
 * 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
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
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// $header$
package org.argouml.core.propertypanels.ui;

import java.util.Iterator;

import org.argouml.model.Model;
import org.argouml.uml.ui.UMLModelElementListModel2;
import org.argouml.uml.ui.behavior.collaborations.ActionAddMessagePredecessor;

/**
 * @since Oct 2, 2002
 * @author jaap.branderhorst@xs4all.nl
 */
class UMLMessagePredecessorListModel extends UMLModelElementListModel {


    /**
     * Constructor for UMLMessagePredecessorListModel.
     */
    public UMLMessagePredecessorListModel(final Object modelElement) {
        super("predecessor", modelElement.getClass(),
            ActionAddMessagePredecessor.getInstance());
        setTarget(modelElement);
    }

    /*
     * @see org.argouml.uml.ui.UMLModelElementListModel2#buildModelList()
     */
    protected void buildModelList() {
        Object message = getTarget();
        removeAllElements();
        Iterator it = Model.getFacade().getPredecessors(message).iterator();
        while (it.hasNext()) {
            addElement(it.next());
        }
    }

    /*
     * @see org.argouml.uml.ui.UMLModelElementListModel2#isValidElement(Object)
     */
    protected boolean isValidElement(Object elem) {
        return Model.getFacade().isAMessage(elem)
            && Model.getFacade().getInteraction(elem)
            	== Model.getFacade().getInteraction(getTarget())
            && Model.getFacade().getActivator(elem)
            	== Model.getFacade().getActivator(getTarget());
    }

}