1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package org.apache.harmony.xml.dom;
18
19import java.util.ArrayList;
20import java.util.List;
21import org.w3c.dom.Node;
22import org.w3c.dom.NodeList;
23
24/**
25 * Provides a straightforward implementation of the corresponding W3C DOM
26 * interface. The class is used internally only, thus only notable members that
27 * are not in the original interface are documented (the W3C docs are quite
28 * extensive). Hope that's ok.
29 * <p>
30 * Some of the fields may have package visibility, so other classes belonging to
31 * the DOM implementation can easily access them while maintaining the DOM tree
32 * structure.
33 */
34public class NodeListImpl implements NodeList {
35
36    private List<NodeImpl> children;
37
38    NodeListImpl() {
39        children = new ArrayList<NodeImpl>();
40    }
41
42    NodeListImpl(List<NodeImpl> list) {
43        children = list;
44    }
45
46    void add(NodeImpl node) {
47        children.add(node);
48    }
49
50    public int getLength() {
51        return children.size();
52    }
53
54    public Node item(int index) {
55        if (index >= children.size()) {
56            return null;
57        } else {
58            return children.get(index);
59        }
60    }
61
62}
63