1 /*
2 * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
3 *
4 * This software is open source.
5 * See the bottom of this file for the licence.
6 *
7 * $Id: DocumentInputSource.java,v 1.6 2004/06/25 08:03:36 maartenc Exp $
8 */
9
10 package org.dom4j.io;
11
12 import java.io.IOException;
13 import java.io.Reader;
14 import java.io.StringReader;
15 import java.io.StringWriter;
16
17 import org.dom4j.Document;
18 import org.xml.sax.InputSource;
19
20
21 /*** <p><code>DocumentInputSource</code> implements a SAX {@link InputSource}
22 * for a {@link Document}.</p>
23 *
24 * @author <a href="mailto:james.strachan@metastuff.com">James Strachan</a>
25 * @version $Revision: 1.6 $
26 */
27 class DocumentInputSource extends InputSource {
28
29 /*** The document source */
30 private Document document;
31
32
33 public DocumentInputSource() {
34 }
35
36 public DocumentInputSource(Document document) {
37 this.document = document;
38 setSystemId( document.getName() );
39 }
40
41
42 // Properties
43 //-------------------------------------------------------------------------
44
45 /*** @return the document which is being used as the SAX {@link InputSource}
46 */
47 public Document getDocument() {
48 return document;
49 }
50
51 /*** Sets the document used as the SAX {@link InputSource}
52 */
53 public void setDocument(Document document) {
54 this.document = document;
55 setSystemId( document.getName() );
56 }
57
58
59 // Overloaded methods
60 //-------------------------------------------------------------------------
61
62 /*** This method is not supported as this source is always a
63 * {@link Document} instance.
64 *
65 * @throws UnsupportedOperationException as this method is unsupported
66 */
67 public void setCharacterStream(Reader characterStream)
68 throws UnsupportedOperationException {
69 throw new UnsupportedOperationException();
70 }
71
72 /*** Note this method is quite inefficent, it turns the in memory XML tree
73 * object model into a single block of text which can then be read by
74 * other XML parsers. Should only be used with care.
75 */
76 public Reader getCharacterStream() {
77 try {
78 StringWriter out = new StringWriter();
79 XMLWriter writer = new XMLWriter( out );
80 writer.write( document );
81 writer.flush();
82 return new StringReader( out.toString() );
83 }
84 catch (final IOException e) {
85 // this should never really happen
86 // but for completeness we'll return a Reader
87 // with the embedded exception inside it
88 return new Reader() {
89 public int read(char ch[], int offset, int length)
90 throws IOException {
91 throw e;
92 }
93 public void close() throws IOException {
94 }
95 };
96 }
97 }
98 }
99
100
101
102
103
104
105
106 /*
107 * Redistribution and use of this software and associated documentation
108 * ("Software"), with or without modification, are permitted provided
109 * that the following conditions are met:
110 *
111 * 1. Redistributions of source code must retain copyright
112 * statements and notices. Redistributions must also contain a
113 * copy of this document.
114 *
115 * 2. Redistributions in binary form must reproduce the
116 * above copyright notice, this list of conditions and the
117 * following disclaimer in the documentation and/or other
118 * materials provided with the distribution.
119 *
120 * 3. The name "DOM4J" must not be used to endorse or promote
121 * products derived from this Software without prior written
122 * permission of MetaStuff, Ltd. For written permission,
123 * please contact dom4j-info@metastuff.com.
124 *
125 * 4. Products derived from this Software may not be called "DOM4J"
126 * nor may "DOM4J" appear in their names without prior written
127 * permission of MetaStuff, Ltd. DOM4J is a registered
128 * trademark of MetaStuff, Ltd.
129 *
130 * 5. Due credit should be given to the DOM4J Project -
131 * http://www.dom4j.org
132 *
133 * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS
134 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
135 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
136 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
137 * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
138 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
139 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
140 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
141 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
142 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
143 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
144 * OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
147 *
148 * $Id: DocumentInputSource.java,v 1.6 2004/06/25 08:03:36 maartenc Exp $
149 */