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.CharacterData;
20import org.w3c.dom.DOMException;
21
22/**
23 * Provides a straightforward implementation of the corresponding W3C DOM
24 * interface. The class is used internally only, thus only notable members that
25 * are not in the original interface are documented (the W3C docs are quite
26 * extensive). Hope that's ok.
27 * <p>
28 * Some of the fields may have package visibility, so other classes belonging to
29 * the DOM implementation can easily access them while maintaining the DOM tree
30 * structure.
31 */
32public abstract class CharacterDataImpl extends LeafNodeImpl implements
33        CharacterData {
34
35    protected StringBuffer buffer;
36
37    CharacterDataImpl(DocumentImpl document, String data) {
38        super(document);
39        setData(data);
40    }
41
42    public void appendData(String arg) throws DOMException {
43        buffer.append(arg);
44    }
45
46    public void deleteData(int offset, int count) throws DOMException {
47        buffer.delete(offset, offset + count);
48    }
49
50    public String getData() throws DOMException {
51        return buffer.toString();
52    }
53
54    /**
55     * Appends this node's text content to the given builder.
56     */
57    public void appendDataTo(StringBuilder stringBuilder) {
58        stringBuilder.append(buffer);
59    }
60
61    public int getLength() {
62        return buffer.length();
63    }
64
65    @Override
66    public String getNodeValue() {
67        return getData();
68    }
69
70    public void insertData(int offset, String arg) throws DOMException {
71        try {
72            buffer.insert(offset, arg);
73        } catch (ArrayIndexOutOfBoundsException ex) {
74            throw new DOMException(DOMException.INDEX_SIZE_ERR, null);
75        }
76    }
77
78    public void replaceData(int offset, int count, String arg)
79            throws DOMException {
80        try {
81            buffer.replace(offset, offset + count, arg);
82        } catch (ArrayIndexOutOfBoundsException ex) {
83            throw new DOMException(DOMException.INDEX_SIZE_ERR, null);
84        }
85    }
86
87    public void setData(String data) throws DOMException {
88        buffer = new StringBuffer(data);
89    }
90
91    public String substringData(int offset, int count) throws DOMException {
92        try {
93            return buffer.substring(offset, offset + count);
94        } catch (ArrayIndexOutOfBoundsException ex) {
95            throw new DOMException(DOMException.INDEX_SIZE_ERR, null);
96        }
97    }
98
99}
100