001 package groovy.xml.streamingmarkupsupport;
002 /*
003
004 Copyright 2004 (C) John Wilson. All Rights Reserved.
005
006 Redistribution and use of this software and associated documentation
007 ("Software"), with or without modification, are permitted provided
008 that the following conditions are met:
009
010 1. Redistributions of source code must retain copyright
011 statements and notices. Redistributions must also contain a
012 copy of this document.
013
014 2. Redistributions in binary form must reproduce the
015 above copyright notice, this list of conditions and the
016 following disclaimer in the documentation and/or other
017 materials provided with the distribution.
018
019 3. The name "groovy" must not be used to endorse or promote
020 products derived from this Software without prior written
021 permission of The Codehaus. For written permission,
022 please contact info@codehaus.org.
023
024 4. Products derived from this Software may not be called "groovy"
025 nor may "groovy" appear in their names without prior written
026 permission of The Codehaus. "groovy" is a registered
027 trademark of The Codehaus.
028
029 5. Due credit should be given to The Codehaus -
030 http://groovy.codehaus.org/
031
032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043 OF THE POSSIBILITY OF SUCH DAMAGE.
044
045 */
046
047 import java.io.IOException;
048 import java.io.OutputStreamWriter;
049 import java.io.Writer;
050 import java.nio.charset.Charset;
051 import java.nio.charset.CharsetEncoder;
052
053 public class StreamingMarkupWriter extends Writer {
054 protected final Writer writer;
055 protected final String encoding;
056 protected final CharsetEncoder encoder;
057 private final Writer bodyWriter = new Writer() {
058 /* (non-Javadoc)
059 * @see java.io.Writer#close()
060 */
061 public void close() throws IOException {
062 StreamingMarkupWriter.this.close();
063 }
064
065 /* (non-Javadoc)
066 * @see java.io.Writer#flush()
067 */
068 public void flush() throws IOException {
069 StreamingMarkupWriter.this.flush();
070 }
071
072 /* (non-Javadoc)
073 * @see java.io.Writer#write(int)
074 */
075 public void write(final int c) throws IOException {
076 if (!StreamingMarkupWriter.this.encoder.canEncode((char)c)) {
077 StreamingMarkupWriter.this.writer.write("&#x");
078 StreamingMarkupWriter.this.writer.write(Integer.toHexString(c));
079 StreamingMarkupWriter.this.writer.write(';');
080 } else if (c == '<') {
081 StreamingMarkupWriter.this.writer.write("<");
082 } else if (c == '>') {
083 StreamingMarkupWriter.this.writer.write(">");
084 } else if (c == '&') {
085 StreamingMarkupWriter.this.writer.write("&");
086 } else {
087 StreamingMarkupWriter.this.writer.write(c);
088 }
089 }
090
091 /* (non-Javadoc)
092 * @see java.io.Writer#write(char[], int, int)
093 */
094 public void write(final char[] cbuf, int off, int len) throws IOException {
095 while (len-- > 0){
096 write(cbuf[off++]);
097 }
098 }
099
100 public Writer attributeValue() {
101 return StreamingMarkupWriter.this.attributeWriter;
102 }
103
104 public Writer bodyText() {
105 return bodyWriter;
106 }
107
108 public Writer unescaped() {
109 return StreamingMarkupWriter.this;
110 }
111 };
112
113 private final Writer attributeWriter = new Writer() {
114 /* (non-Javadoc)
115 * @see java.io.Writer#close()
116 */
117 public void close() throws IOException {
118 StreamingMarkupWriter.this.close();
119 }
120
121 /* (non-Javadoc)
122 * @see java.io.Writer#flush()
123 */
124 public void flush() throws IOException {
125 StreamingMarkupWriter.this.flush();
126 }
127
128 /* (non-Javadoc)
129 * @see java.io.Writer#write(int)
130 */
131 public void write(final int c) throws IOException {
132 if (c == '\'') {
133 StreamingMarkupWriter.this.writer.write("'");
134 } else {
135 StreamingMarkupWriter.this.bodyWriter.write(c);
136 }
137 }
138
139 /* (non-Javadoc)
140 * @see java.io.Writer#write(char[], int, int)
141 */
142 public void write(final char[] cbuf, int off, int len) throws IOException {
143 while (len-- > 0){
144 write(cbuf[off++]);
145 }
146 }
147
148 public Writer attributeValue() {
149 return attributeWriter;
150 }
151
152 public Writer bodyText() {
153 return StreamingMarkupWriter.this.bodyWriter;
154 }
155
156 public Writer unescaped() {
157 return StreamingMarkupWriter.this;
158 }
159 };
160
161 public StreamingMarkupWriter(final Writer writer, final String encoding) {
162 this.writer = writer;
163
164 if (encoding != null) {
165 this.encoding = encoding;
166 } else if (writer instanceof OutputStreamWriter) {
167 this.encoding = ((OutputStreamWriter)writer).getEncoding();
168 } else {
169 this.encoding = "US-ASCII";
170 }
171
172 this.encoder = Charset.forName(this.encoding).newEncoder();
173 }
174
175 public StreamingMarkupWriter(final Writer writer) {
176 this(writer, null);
177 }
178
179 /* (non-Javadoc)
180 * @see java.io.Writer#close()
181 */
182 public void close() throws IOException {
183 this.writer.close();
184 }
185
186 /* (non-Javadoc)
187 * @see java.io.Writer#flush()
188 */
189 public void flush() throws IOException {
190 this.writer.flush();
191 }
192
193 /* (non-Javadoc)
194 * @see java.io.Writer#write(int)
195 */
196 public void write(final int c) throws IOException {
197 if (!this.encoder.canEncode((char)c)) {
198 this.writer.write("&#x");
199 this.writer.write(Integer.toHexString(c));
200 this.writer.write(';');
201 } else {
202 this.writer.write(c);
203 }
204 }
205
206 /* (non-Javadoc)
207 * @see java.io.Writer#write(char[], int, int)
208 */
209 public void write(final char[] cbuf, int off, int len) throws IOException {
210 while (len-- > 0){
211 write(cbuf[off++]);
212 }
213 }
214
215 public Writer attributeValue() {
216 return this.attributeWriter;
217 }
218
219 public Writer bodyText() {
220 return this.bodyWriter;
221 }
222
223 public Writer unescaped() {
224 return this;
225 }
226
227 public String getEncoding() {
228 return this.encoding;
229 }
230 }