001 /* SAXSource.java --
002 Copyright (C) 2004, 2005 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038 package javax.xml.transform.sax;
039
040 import java.io.InputStream;
041 import java.io.Reader;
042 import javax.xml.transform.Source;
043 import javax.xml.transform.stream.StreamSource;
044 import org.xml.sax.InputSource;
045 import org.xml.sax.XMLReader;
046
047 /**
048 * Specifies a SAX XML source. This is a tuple of input source and SAX
049 * parser.
050 *
051 * @author (a href='mailto:dog@gnu.org'>Chris Burdess</a)
052 */
053 public class SAXSource
054 implements Source
055 {
056
057 /**
058 * Factory feature indicating that SAX sources are supported.
059 */
060 public static final String FEATURE =
061 "http://javax.xml.transform.sax.SAXSource/feature";
062
063 private XMLReader xmlReader;
064 private InputSource inputSource;
065
066 /**
067 * Default constructor.
068 */
069 public SAXSource()
070 {
071 }
072
073 /**
074 * Constructor with a SAX parser and input source.
075 */
076 public SAXSource(XMLReader reader, InputSource inputSource)
077 {
078 xmlReader = reader;
079 this.inputSource = inputSource;
080 }
081
082 /**
083 * Constructor with an input source.
084 * The SAX parser will be instantiated by the transformer.
085 */
086 public SAXSource(InputSource inputSource)
087 {
088 this.inputSource = inputSource;
089 }
090
091 /**
092 * Sets the SAX parser to be used by this source.
093 * If null, the transformer will instantiate its own parser.
094 */
095 public void setXMLReader(XMLReader reader)
096 {
097 xmlReader = reader;
098 }
099
100 /**
101 * Returns the SAX parser to be used by this source.
102 * If null, the transformer will instantiate its own parser.
103 */
104 public XMLReader getXMLReader()
105 {
106 return xmlReader;
107 }
108
109 /**
110 * Sets the input source to parse.
111 */
112 public void setInputSource(InputSource inputSource)
113 {
114 this.inputSource = inputSource;
115 }
116
117 /**
118 * Returns the input source to parse.
119 */
120 public InputSource getInputSource()
121 {
122 return inputSource;
123 }
124
125 /**
126 * Sets the system ID for this source.
127 */
128 public void setSystemId(String systemId)
129 {
130 if (inputSource != null)
131 {
132 inputSource.setSystemId(systemId);
133 }
134 }
135
136 /**
137 * Returns the system ID for this source.
138 */
139 public String getSystemId()
140 {
141 if (inputSource != null)
142 {
143 return inputSource.getSystemId();
144 }
145 return null;
146 }
147
148 /**
149 * Converts a source into a SAX input source.
150 * This method can use a StreamSource or the system ID.
151 * @return an input source or null
152 */
153 public static InputSource sourceToInputSource(Source source)
154 {
155 InputSource in = null;
156 if (source instanceof SAXSource)
157 {
158 in = ((SAXSource) source).getInputSource();
159 }
160 else if (source instanceof StreamSource)
161 {
162 StreamSource streamSource = (StreamSource) source;
163 InputStream inputStream = streamSource.getInputStream();
164 if (inputStream != null)
165 {
166 in = new InputSource(inputStream);
167 }
168 else
169 {
170 Reader reader = streamSource.getReader();
171 if (reader != null)
172 {
173 in = new InputSource(reader);
174 }
175 }
176 String publicId = streamSource.getPublicId();
177 if (publicId != null && in != null)
178 {
179 in.setPublicId(publicId);
180 }
181 }
182 String systemId = source.getSystemId();
183 if (systemId != null)
184 {
185 if (in == null)
186 {
187 in = new InputSource(systemId);
188 }
189 else
190 {
191 in.setSystemId(systemId);
192 }
193 }
194 return in;
195 }
196
197 }