Ptidej-v5.2-master/POM Tests/data/ArgoUML_0.28/src/org/argouml/uml/ui/foundation/extension_mechanisms/ActionSetMetaClass.java
// $Id: ActionSetMetaClass.java 12546 2007-05-05 16:54:40Z linus $
// Copyright (c) 2003-2007 The Regents of the University of California. All
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// software and its documentation without fee, and without a written
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package org.argouml.uml.ui.foundation.extension_mechanisms;

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

import javax.swing.Action;

import org.argouml.application.helpers.ResourceLoaderWrapper;
import org.argouml.i18n.Translator;
import org.argouml.model.Model;
import org.argouml.uml.ui.UMLComboBox2;
import org.tigris.gef.undo.UndoableAction;

/**
 * Action to set the baseclass of a stereotype.
 * 
 * TODO: This needs to be extended to support multiple bases classes for a
 * stereotype as added in UML 1.4.
 * 
 * @author mkl
 */
public class ActionSetMetaClass extends UndoableAction {

    /**
     * The Singleton.
     */
    public static final ActionSetMetaClass SINGLETON =
	new ActionSetMetaClass();

    /**
     * Constructor.
     */
    public ActionSetMetaClass() {
        super(Translator.localize("Set"),
                ResourceLoaderWrapper.lookupIcon("Set"));
        // Set the tooltip string:
        putValue(Action.SHORT_DESCRIPTION, 
                Translator.localize("Set"));
    }

    /*
     * @see org.tigris.gef.undo.UndoableAction#actionPerformed(java.awt.event.ActionEvent)
     */
    public void actionPerformed(ActionEvent e) {
        super.actionPerformed(e);
        Object source = e.getSource();
        Object newBase = null;
        Object stereo = null;
        if (source instanceof UMLComboBox2) {
            UMLComboBox2 combo = (UMLComboBox2) source;
            stereo = combo.getTarget();
            if (Model.getFacade().isAStereotype(stereo)) {
                Collection oldBases = Model.getFacade().getBaseClasses(stereo);
                newBase = combo.getSelectedItem();
                if (newBase != null) { // TODO: How come this happens?
                    if (!oldBases.contains(newBase)) {
                        Model.getExtensionMechanismsHelper().addBaseClass(
                                stereo,
                                newBase);
                    } else {
                        if (newBase != null && newBase.equals("")) {
                            Model.getExtensionMechanismsHelper().addBaseClass(
                                    stereo, "ModelElement");
                        }
                    }
                }
            }
        }
    }
}
