/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999, 2000 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.tools.ant.gui.acs;
import org.apache.tools.ant.gui.acs.ACSElement;
import org.apache.tools.ant.gui.acs.ACSTargetElement;

import javax.swing.tree.DefaultTreeSelectionModel;
import javax.swing.tree.TreePath;
import java.util.*;

/**
 * Selection model for the currently selected targets.
 * 
 * @version $Revision$ 
 * @author Simeon Fitch 
 */
public class ElementTreeSelectionModel extends DefaultTreeSelectionModel {
	/** 
	 * Default ctor.
	 * 
	 */
    public ElementTreeSelectionModel() {
        setSelectionMode(DISCONTIGUOUS_TREE_SELECTION);
    }

	/** 
	 * Convenience method for providing the set of currently selected
     * elements. NB: It returns all of the nodes in the selection path, 
     * so the root node will be a selected element whenever a child is 
     * selected.
	 * 
     * @return the currently selected elements.
	 */
    public ACSElement[] getSelectedElements() {
        TreePath[] path = getSelectionPaths();
        List values = new LinkedList();
        for(int i = 0; path != null && i < path.length; i++) {
            TreePath curr = path[i];
            for(int j = 0; j < curr.getPathCount(); j++) {
                Object item = curr.getPathComponent(j);
                if(item instanceof ACSElement) {
                    values.add(item);
                }
            }
        }

        ACSElement[] retval = new ACSElement[values.size()];
        values.toArray(retval);
        return retval;
    }

}