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(""); 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(char[], int, int) 195 */ 196 public void write(final char[] cbuf, int off, int len) throws IOException { 197 this.writer.write(cbuf, off, len); 198 } 199 200 public Writer attributeValue() { 201 return this.attributeWriter; 202 } 203 204 public Writer bodyText() { 205 return this.bodyWriter; 206 } 207 208 public Writer unescaped() { 209 return this; 210 } 211 }