/*
 * Copyright 2004-2014 SmartBear Software
 *
 * Licensed under the EUPL, Version 1.1 or - as soon as they will be approved by the European Commission - subsequent
 * versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 *
 * http://ec.europa.eu/idabc/eupl
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the Licence is
 * distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the Licence for the specific language governing permissions and limitations
 * under the Licence.
*//**
 * MySwing: Advanced Swing Utilites
 * Copyright (C) 2005  Santhosh Kumar T
 * <p/>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p/>
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 */

package skt.swing.tree;

import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.util.Enumeration;
import java.util.NoSuchElementException;

/**
 * @author Santhosh Kumar T
 * @email santhosh@in.fiorano.com
 */
public class ChildrenEnumeration implements Enumeration {
    private TreePath path;
    private TreeModel model;
    private int position = 0;
    private int childCount;

    public ChildrenEnumeration(TreePath path, TreeModel model) {
        this.path = path;
        this.model = model;
        childCount = model.getChildCount(path.getLastPathComponent());
    }

    public boolean hasMoreElements() {
        return position < childCount;
    }

    public Object nextElement() {
        if (!hasMoreElements()) {
            throw new NoSuchElementException();
        }
        return path.pathByAddingChild(model.getChild(path.getLastPathComponent(), position++));
    }
}