/* $Id: UMLLinkConnectionListModel.java 17890 2010-01-12 21:21:00Z 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:
 *    mvw
 *****************************************************************************
 *
 * 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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package org.argouml.uml.ui.behavior.common_behavior;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.argouml.model.Model;
import org.argouml.uml.ui.UMLModelElementOrderedListModel2;

/**
 *
 */
public class UMLLinkConnectionListModel
    extends UMLModelElementOrderedListModel2 {

    private static final long serialVersionUID = 4459749162218567926L;

    /**
     * Constructor for UMLInstanceLinkEndListModel.
     */
    public UMLLinkConnectionListModel() {
        super("linkEnd");
    }

    /*
     * @see org.argouml.uml.ui.UMLModelElementListModel2#buildModelList()
     */
    protected void buildModelList() {
        if (getTarget() != null) {
            setAllElements(Model.getFacade().getConnections(getTarget()));
        }
    }

    /*
     * @see org.argouml.uml.ui.UMLModelElementListModel2#isValidElement(Object)
     */
    protected boolean isValidElement(Object element) {
        return Model.getFacade().getConnections(getTarget()).contains(element);
    }

    /*
     * @see org.argouml.uml.ui.UMLModelElementOrderedListModel2#moveDown(int)
     */
    protected void moveDown(int index) {
        Object link = getTarget();
        List c = new ArrayList(Model.getFacade().getConnections(link));
        if (index < c.size() - 1) {
            Collections.swap(c, index, index + 1);
            Model.getCoreHelper().setConnections(link, c);

        /* The MDR model does not support the 2nd method below for LinkEnds.
         * Hence we can not replace the above inefficient code
         * by the code below. */
//        Model.getCoreHelper().removeConnection(link, mem1);
//        Model.getCoreHelper().addConnection(link, index2, mem1);
        }
    }

    /**
     * @see org.argouml.uml.ui.UMLModelElementOrderedListModel2#moveToBottom(int)
     */
    @Override
    protected void moveToBottom(int index) {
        Object link = getTarget();
        List c = new ArrayList(Model.getFacade().getConnections(link));
        if (index < c.size() - 1) {
            Object mem = c.get(index);
            c.remove(mem);
            c.add(mem);
            Model.getCoreHelper().setConnections(link, c);
        }
    }

    /**
     * @see org.argouml.uml.ui.UMLModelElementOrderedListModel2#moveToTop(int)
     */
    @Override
    protected void moveToTop(int index) {
        Object link = getTarget();
        List c = new ArrayList(Model.getFacade().getConnections(link));
        if (index > 0) {
            Object mem = c.get(index);
            c.remove(mem);
            c.add(0, mem);
            Model.getCoreHelper().setConnections(link, c);
        }
    }
}