// $Id: UMLStateVertexIncomingListModel.java,v 1.11 2004/09/22 17:55:54 mvw Exp $
// Copyright (c) 1996-2003 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.behavior.state_machines;

import java.util.ArrayList;

import org.argouml.model.ModelFacade;
import org.argouml.uml.ui.UMLModelElementListModel2;

/**
 * Listmodel for the incoming transitions of a Statevertex
 * 
 * @since Dec 14, 2002
 * @author jaap.branderhorst@xs4all.nl
 */
public class UMLStateVertexIncomingListModel extends UMLModelElementListModel2 {

    /**
     * Constructor for UMLStateVertexIncomingListModel.
     */
    public UMLStateVertexIncomingListModel() {
        super("incoming");
    }

    /**
     * @see org.argouml.uml.ui.UMLModelElementListModel2#buildModelList()
     */
    protected void buildModelList() {
        ArrayList c = new ArrayList(ModelFacade.getIncomings(getTarget()));
        if (ModelFacade.isAState(getTarget())) {
            ArrayList i = new ArrayList(ModelFacade
                .getInternalTransitions(getTarget()));
            c.removeAll(i);
        }
        setAllElements(c);
    }

    /**
     * @see org.argouml.uml.ui.UMLModelElementListModel2#isValidElement(Object)
     */
    protected boolean isValidElement(Object/* MBase */element) {
        ArrayList c = new ArrayList(ModelFacade.getIncomings(getTarget()));
        if (ModelFacade.isAState(getTarget())) {
            ArrayList i = new ArrayList(ModelFacade
                .getInternalTransitions(getTarget()));
            c.removeAll(i);
        }
        return c.contains(element);
    }
}