AttrImpl.java revision f6c387128427e121477c1b32ad35cdcaa5101ba3 
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.Attr;
20import org.w3c.dom.DOMException;
21import org.w3c.dom.Element;
22import org.w3c.dom.Node;
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 AttrImpl extends NodeImpl implements Attr {
35
36    // Maintained by ElementImpl.
37    ElementImpl ownerElement;
38
39    private boolean namespaceAware;
40
41    private String namespaceURI;
42
43    private String localName;
44
45    private String prefix;
46
47    private String value;
48
49    AttrImpl(DocumentImpl document, String namespaceURI, String qualifiedName) {
50        super(document);
51
52        namespaceAware = true;
53        this.namespaceURI = namespaceURI;
54
55        if (qualifiedName == null || "".equals(qualifiedName)) {
56            throw new DOMException(DOMException.NAMESPACE_ERR, qualifiedName);
57        }
58
59        int prefixSeparator = qualifiedName.lastIndexOf(":");
60        if (prefixSeparator != -1) {
61            setPrefix(qualifiedName.substring(0, prefixSeparator));
62            qualifiedName = qualifiedName.substring(prefixSeparator + 1);
63        }
64
65        localName = qualifiedName;
66
67        if ("".equals(localName)) {
68            throw new DOMException(DOMException.NAMESPACE_ERR, localName);
69        }
70
71        if ("xmlns".equals(localName) && !"http://www.w3.org/2000/xmlns/".equals(namespaceURI)) {
72            throw new DOMException(DOMException.NAMESPACE_ERR, localName);
73        }
74
75        if (!document.isXMLIdentifier(localName)) {
76            throw new DOMException(DOMException.INVALID_CHARACTER_ERR, localName);
77        }
78
79        value = "";
80    }
81
82    AttrImpl(DocumentImpl document, String name) {
83        super(document);
84
85        this.namespaceAware = false;
86
87        int prefixSeparator = name.lastIndexOf(":");
88        if (prefixSeparator != -1) {
89            String prefix = name.substring(0, prefixSeparator);
90            String localName = name.substring(prefixSeparator + 1);
91
92            if (!document.isXMLIdentifier(prefix) || !document.isXMLIdentifier(localName)) {
93                throw new DOMException(DOMException.INVALID_CHARACTER_ERR, name);
94            }
95        } else {
96            if (!document.isXMLIdentifier(name)) {
97                throw new DOMException(DOMException.INVALID_CHARACTER_ERR, name);
98            }
99        }
100
101        this.localName = name;
102    }
103
104    @Override
105    public String getLocalName() {
106        return namespaceAware ? localName : null;
107    }
108
109    public String getName() {
110        return (prefix != null ? prefix + ":" : "") + localName;
111    }
112
113    @Override
114    public String getNamespaceURI() {
115        return namespaceURI;
116    }
117
118    @Override
119    public String getNodeName() {
120        return getName();
121    }
122
123    public short getNodeType() {
124        return Node.ATTRIBUTE_NODE;
125    }
126
127    @Override
128    public String getNodeValue() {
129        return getValue();
130    }
131
132    public Element getOwnerElement() {
133        return ownerElement;
134    }
135
136    @Override
137    public String getPrefix() {
138        return prefix;
139    }
140
141    public boolean getSpecified() {
142        return value != null;
143    }
144
145    public String getValue() {
146        return value;
147    }
148
149    @Override
150    public void setNodeValue(String value) throws DOMException {
151        setValue(value);
152    }
153
154    @Override
155    public void setPrefix(String prefix) {
156        if (!namespaceAware) {
157            throw new DOMException(DOMException.NAMESPACE_ERR, prefix);
158        }
159
160        if (prefix != null) {
161            if (namespaceURI == null || !document.isXMLIdentifier(prefix) || "xmlns".equals(prefix)) {
162                throw new DOMException(DOMException.NAMESPACE_ERR, prefix);
163            }
164
165            if ("xml".equals(prefix) && !"http://www.w3.org/XML/1998/namespace".equals(namespaceURI)) {
166                throw new DOMException(DOMException.NAMESPACE_ERR, prefix);
167            }
168        }
169
170        this.prefix = prefix;
171    }
172
173    public void setValue(String value) throws DOMException {
174        this.value = value;
175    }
176
177}
178