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/*
 * Copyright 2010 Alibaba Group Holding Limited.
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * @(#)DOMNodeListImpl.java   1.11 2000/08/16
 *
 */

package org.w3c.tidy;

/**
 *
 * DOMNodeListImpl
 *
 * (c) 1998-2000 (W3C) MIT, INRIA, Keio University
 * See Tidy.java for the copyright notice.
 * Derived from 
 * HTML Tidy Release 4 Aug 2000
 *
 * @author Dave Raggett 
 * @author Andy Quick  (translation to Java)
 * @version 1.4, 1999/09/04 DOM support
 * @version 1.5, 1999/10/23 Tidy Release 27 Sep 1999
 * @version 1.6, 1999/11/01 Tidy Release 22 Oct 1999
 * @version 1.7, 1999/12/06 Tidy Release 30 Nov 1999
 * @version 1.8, 2000/01/22 Tidy Release 13 Jan 2000
 * @version 1.9, 2000/06/03 Tidy Release 30 Apr 2000
 * @version 1.10, 2000/07/22 Tidy Release 8 Jul 2000
 * @version 1.11, 2000/08/16 Tidy Release 4 Aug 2000
 */

/**
 * 
 * The items in the NodeList are accessible via an integral index,
 * starting from 0.
 */
public class DOMNodeListImpl implements org.w3c.dom.NodeList {

    private Node parent = null;

    protected DOMNodeListImpl(Node parent) {
        this.parent = parent;
    }

    /** @see org.w3c.dom.NodeList#item */
    public org.w3c.dom.Node item(int index) {
        int i = 0;
        Node node = parent.content;
        while (node != null) {
            if (i >= index) {
                break;
            }
            i++;
            node = node.next;
        }
        if (node != null) {
            return node.getAdapter();
        } else {
            return null;
        }
    }

    /** @see org.w3c.dom.NodeList#getLength */
    public int getLength() {
        int len = 0;
        Node node = parent.content;
        while (node != null) {
            len++;
            node = node.next;
        }
        return len;
    }
}