Ptidej-v5.2-master/POM Tests/data/ArgoUML_0.28/src/org/argouml/uml/ui/behavior/activity_graphs/UMLObjectFlowStateClassifierComboBoxModel.java
// $Id: UMLObjectFlowStateClassifierComboBoxModel.java 15837 2008-09-30 23:53:25Z bobtarling $
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package org.argouml.uml.ui.behavior.activity_graphs;

import java.beans.PropertyChangeEvent;
import java.util.ArrayList;
import java.util.Collection;

import org.argouml.kernel.ProjectManager;
import org.argouml.model.Model;
import org.argouml.model.UmlChangeEvent;
import org.argouml.uml.ui.UMLComboBoxModel2;

/**
 * A model for the type of an ObjectFlowState.
 * This combo shows the Classifier or the ClassifierInState! 
 * 
 * @since Oct 10, 2002
 * @author jaap.branderhorst@xs4all.nl, alexb
 */
public class UMLObjectFlowStateClassifierComboBoxModel
    extends UMLComboBoxModel2 {

    /**
     * Constructor.
     */
    public UMLObjectFlowStateClassifierComboBoxModel() {
        super("type", false);
    }

    /*
     * @see org.argouml.uml.ui.UMLComboBoxModel2#isValidElement(Object)
     */
    protected boolean isValidElement(Object o) {
        return Model.getFacade().isAClassifier(o);
    }

    /**
     * Get all Classifiers that are not ClassifierInState.
     * 
     * @see org.argouml.uml.ui.UMLComboBoxModel2#buildModelList()
     */
    protected void buildModelList() {
        Object model =
            ProjectManager.getManager().getCurrentProject().getModel();
        Collection newList = 
            new ArrayList(Model.getCoreHelper().getAllClassifiers(model));

        // get the current type - normally we won't need this, but who knows?
        if (getTarget() != null) {
            Object type = Model.getFacade().getType(getTarget());
            if (type != null)
                if (!newList.contains(type)) newList.add(type);
        }

        setElements(newList);
    }

    /**
     * Returns a Classifier that may be a ClassifierInState.
     * 
     * {@inheritDoc}
     */
    protected Object getSelectedModelElement() {
        if (getTarget() != null) {
            return Model.getFacade().getType(getTarget());
        }
        return null;
    }

    /**
     * The function in the parent removes items from the list when deselected.
     * We do not need that here.
     * 
     * @param evt
     *            A PropertyChangeEvent object describing the event source and
     *            the property that has changed.
     */
    public void modelChanged(UmlChangeEvent evt) {
        buildingModel = true;
        buildModelList();
        buildingModel = false;
        setSelectedItem(getSelectedModelElement());
    }
}
