View Javadoc

    1   package org.codehaus.groovy.sandbox.markup;
    2   /*
    3
    4   Copyright 2004 (C) John Wilson. All Rights Reserved.
    5
    6   Redistribution and use of this software and associated documentation
    7   ("Software"), with or without modification, are permitted provided
    8   that the following conditions are met:
    9
    10  1. Redistributions of source code must retain copyright
    11     statements and notices.  Redistributions must also contain a
    12     copy of this document.
    13
    14  2. Redistributions in binary form must reproduce the
    15     above copyright notice, this list of conditions and the
    16     following disclaimer in the documentation and/or other
    17     materials provided with the distribution.
    18
    19  3. The name "groovy" must not be used to endorse or promote
    20     products derived from this Software without prior written
    21     permission of The Codehaus.  For written permission,
    22     please contact info@codehaus.org.
    23
    24  4. Products derived from this Software may not be called "groovy"
    25     nor may "groovy" appear in their names without prior written
    26     permission of The Codehaus. "groovy" is a registered
    27     trademark of The Codehaus.
    28
    29  5. Due credit should be given to The Codehaus -
    30     http://groovy.codehaus.org/
    31
    32  THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
    33  ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
    34  NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
    35  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
    36  THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
    37  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    38  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    39  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    40  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    41  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    42  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
    43  OF THE POSSIBILITY OF SUCH DAMAGE.
    44
    45  */
    46
    47  import java.io.IOException;
    48  import java.io.Writer;
    49
    50  public class StreamingMarkupWriter extends Writer {
    51  	protected final Writer delegate;
    52  	private final int encodingLimit = 127; // initally encode everything that's not US ASCII
    53  	private final Writer bodyWriter =  new Writer() {
    54  											/* (non-Javadoc)
    55  											 * @see java.io.Writer#close()
    56  											 */
    57  											public void close() throws IOException {
    58  												StreamingMarkupWriter.this.close();
    59  											}
    60
    61  											/* (non-Javadoc)
    62  											 * @see java.io.Writer#flush()
    63  											 */
    64  											public void flush() throws IOException {
    65  												StreamingMarkupWriter.this.flush();
    66  											}
    67
    68  											/* (non-Javadoc)
    69  											 * @see java.io.Writer#write(int)
    70  											 */
    71  											public void write(int c) throws IOException {
    72  												if (c > StreamingMarkupWriter.this.encodingLimit) {
    73  													StreamingMarkupWriter.this.delegate.write("&#x");
    74  													StreamingMarkupWriter.this.delegate.write(Integer.toHexString(c));
    75  													StreamingMarkupWriter.this.delegate.write(';');
    76  												} else if (c == '<') {
    77  													StreamingMarkupWriter.this.delegate.write("&lt;");
    78  												} else if (c == '>') {
    79  													StreamingMarkupWriter.this.delegate.write("&gt;");
    80  												} else if (c == '&') {
    81  													StreamingMarkupWriter.this.delegate.write("&amp;");
    82  												} else {
    83  													StreamingMarkupWriter.this.delegate.write(c);
    84  												}
    85  											}
    86
    87  											/* (non-Javadoc)
    88  											 * @see java.io.Writer#write(char[], int, int)
    89  											 */
    90  											public void write(final char[] cbuf, int off, int len) throws IOException {
    91  												while (len-- > 0){
    92  													write(cbuf[off++]);
    93  												}
    94  											}
    95
    96  											public Writer attributeValue() {
    97  												return StreamingMarkupWriter.this.attributeWriter;
    98  											}
    99
    100 											public Writer bodyText() {
    101 												return bodyWriter;
    102 											}
    103
    104 											public Writer unescaped() {
    105 												return StreamingMarkupWriter.this;
    106 											}
    107 										};
    108
    109 	private final Writer attributeWriter =  new Writer() {
    110 												/* (non-Javadoc)
    111 												 * @see java.io.Writer#close()
    112 												 */
    113 												public void close() throws IOException {
    114 													StreamingMarkupWriter.this.close();
    115 												}
    116
    117 												/* (non-Javadoc)
    118 												 * @see java.io.Writer#flush()
    119 												 */
    120 												public void flush() throws IOException {
    121 													StreamingMarkupWriter.this.flush();
    122 												}
    123
    124 												/* (non-Javadoc)
    125 												 * @see java.io.Writer#write(int)
    126 												 */
    127 												public void write(int c) throws IOException {
    128 													if (c == '\'') {
    129 														StreamingMarkupWriter.this.delegate.write("&apos;");
    130 													} else {
    131 														StreamingMarkupWriter.this.bodyWriter.write(c);
    132 													}
    133 												}
    134
    135 												/* (non-Javadoc)
    136 												 * @see java.io.Writer#write(char[], int, int)
    137 												 */
    138 												public void write(final char[] cbuf, int off, int len) throws IOException {
    139 													while (len-- > 0){
    140 														write(cbuf[off++]);
    141 													}
    142 												}
    143
    144 												public Writer attributeValue() {
    145 													return attributeWriter;
    146 												}
    147
    148 												public Writer bodyText() {
    149 													return StreamingMarkupWriter.this.bodyWriter;
    150 												}
    151
    152 												public Writer unescaped() {
    153 													return StreamingMarkupWriter.this;
    154 												}
    155 											};
    156
    157 		public StreamingMarkupWriter(final Writer delegate) {
    158 			this.delegate = delegate;
    159 		}
    160
    161 		/* (non-Javadoc)
    162 		 * @see java.io.Writer#close()
    163 		 */
    164 		public void close() throws IOException {
    165 			this.delegate.close();
    166 		}
    167
    168 		/* (non-Javadoc)
    169 		 * @see java.io.Writer#flush()
    170 		 */
    171 		public void flush() throws IOException {
    172 			this.delegate.flush();
    173 		}
    174
    175 		/* (non-Javadoc)
    176 		 * @see java.io.Writer#write(char[], int, int)
    177 		 */
    178 		public void write(final char[] cbuf, int off, int len) throws IOException {
    179 			this.delegate.write(cbuf, off, len);
    180 		}
    181
    182 		public Writer attributeValue() {
    183 			return this.attributeWriter;
    184 		}
    185
    186 		public Writer bodyText() {
    187 			return this.bodyWriter;
    188 		}
    189
    190 		public Writer unescaped() {
    191 			return this;
    192 		}
    193 	}