1/*
2 * Copyright (c) 2004 World Wide Web Consortium,
3 *
4 * (Massachusetts Institute of Technology, European Research Consortium for
5 * Informatics and Mathematics, Keio University). All Rights Reserved. This
6 * work is distributed under the W3C(r) Software License [1] in the hope that
7 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
8 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
9 *
10 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
11 */
12
13package org.w3c.dom;
14
15/**
16 *  The <code>DOMImplementationList</code> interface provides the abstraction
17 * of an ordered collection of DOM implementations, without defining or
18 * constraining how this collection is implemented. The items in the
19 * <code>DOMImplementationList</code> are accessible via an integral index,
20 * starting from 0.
21 * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.
22 * @since DOM Level 3
23 */
24public interface DOMImplementationList {
25    /**
26     *  Returns the <code>index</code>th item in the collection. If
27     * <code>index</code> is greater than or equal to the number of
28     * <code>DOMImplementation</code>s in the list, this returns
29     * <code>null</code>.
30     * @param index Index into the collection.
31     * @return  The <code>DOMImplementation</code> at the <code>index</code>
32     *   th position in the <code>DOMImplementationList</code>, or
33     *   <code>null</code> if that is not a valid index.
34     */
35    public DOMImplementation item(int index);
36
37    /**
38     *  The number of <code>DOMImplementation</code>s in the list. The range
39     * of valid child node indices is 0 to <code>length-1</code> inclusive.
40     */
41    public int getLength();
42
43}
44