NodeListImpl.java revision 6b811c5daec1b28e6f63b57f98a032236f2c3cf7 
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 org.w3c.dom.Node;
20import org.w3c.dom.NodeList;
21
22import java.util.ArrayList;
23import java.util.List;
24
25/**
26 * Provides a straightforward implementation of the corresponding W3C DOM
27 * interface. The class is used internally only, thus only notable members that
28 * are not in the original interface are documented (the W3C docs are quite
29 * extensive). Hope that's ok.
30 * <p>
31 * Some of the fields may have package visibility, so other classes belonging to
32 * the DOM implementation can easily access them while maintaining the DOM tree
33 * structure.
34 */
35public class NodeListImpl implements NodeList {
36
37    private List<NodeImpl> children;
38
39    NodeListImpl() {
40        children = new ArrayList<NodeImpl>();
41    }
42
43    NodeListImpl(List<NodeImpl> list) {
44        children = list;
45    }
46
47    void add(NodeImpl node) {
48        children.add(node);
49    }
50
51    public int getLength() {
52        return children.size();
53    }
54
55    public Node item(int index) {
56        if (index >= children.size()) {
57            return null;
58        } else {
59            return children.get(index);
60        }
61    }
62
63}
64