Ptidej-v5.2-master/POM Tests/data/ArgoUML_0.28/src/org/argouml/uml/ui/foundation/core/ActionSetFlowSource.java
// $Id: ActionSetFlowSource.java 13825 2007-11-23 23:48:22Z tfmorris $
// 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
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// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
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// $header$
package org.argouml.uml.ui.foundation.core;

import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.util.Collection;

import javax.swing.Action;

import org.argouml.i18n.Translator;
import org.argouml.model.Model;
import org.argouml.uml.ui.UMLComboBox2;
import org.tigris.gef.undo.UndoableAction;
/**
 * @since Oct 12, 2002
 * @author jaap.branderhorst@xs4all.nl
 * @stereotype singleton
 */
public class ActionSetFlowSource extends UndoableAction {

    private static final ActionSetFlowSource SINGLETON =
        new ActionSetFlowSource();

    /**
     * Constructor for ActionSetElementOwnershipSpecification.
     */
    protected ActionSetFlowSource() {
        super(Translator.localize("Set"), null);
        // Set the tooltip string:
        putValue(Action.SHORT_DESCRIPTION, 
                Translator.localize("Set"));
    }

    /*
     * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
     */
    public void actionPerformed(ActionEvent e) {
        super.actionPerformed(e);
        if (e.getSource() instanceof UMLComboBox2) {
            UMLComboBox2 source = (UMLComboBox2) e.getSource();
            Object target = source.getTarget();
            if (Model.getFacade().isAFlow(target)) {
                Object flow = target;
                Object old = null;
                if (!Model.getFacade().getSources(flow).isEmpty()) {
                    old = Model.getFacade().getSources(flow).toArray()[0];
                }
                if (old != source.getSelectedItem()) {
                    if (source.getSelectedItem() != null) {
                        Collection sources = new ArrayList();
                        sources.add(source.getSelectedItem());
                        Model.getCoreHelper().setSources(flow, sources);
                    }
                }
            }
        }
    }

    /**
     * @return Returns the SINGLETON.
     */
    public static ActionSetFlowSource getInstance() {
        return SINGLETON;
    }

}
