1 /*
2 * $Source$
3 * $Revision$
4 *
5 * Copyright (C) 2003 Jim Wright - Bohemian Enterprise
6 *
7 * Part of Melati (http://melati.org), a framework for the rapid
8 * development of clean, maintainable web applications.
9 *
10 * Melati is free software; Permission is granted to copy, distribute
11 * and/or modify this software under the terms either:
12 *
13 * a) the GNU General Public License as published by the Free Software
14 * Foundation; either version 2 of the License, or (at your option)
15 * any later version,
16 *
17 * or
18 *
19 * b) any version of the Melati Software License, as published
20 * at http://melati.org
21 *
22 * You should have received a copy of the GNU General Public License and
23 * the Melati Software License along with this program;
24 * if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the
26 * GNU General Public License and visit http://melati.org to obtain the
27 * Melati Software License.
28 *
29 * Feel free to contact the Developers of Melati (http://melati.org),
30 * if you would like to work out a different arrangement than the options
31 * outlined here. It is our intention to allow Melati to be used by as
32 * wide an audience as possible.
33 *
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
38 *
39 * Contact details for copyright holder:
40 *
41 * Jim Wright <jimw At paneris.org>
42 */
43
44 package org.melati.template.webmacro;
45
46 import org.melati.Melati;
47 import org.melati.template.TemplateIOException;
48 import org.melati.util.MelatiBugMelatiException;
49 import org.melati.util.MelatiStringWriter;
50
51 import org.webmacro.Broker;
52 import org.webmacro.InitException;
53
54 import java.io.IOException;
55 import java.io.UnsupportedEncodingException;
56
57 /**
58 * {@link MelatiStringWriter} that can be used with WebMacro.
59 *
60 * @see WebmacroTemplate#write(org.melati.util.MelatiWriter,
61 * org.melati.template.TemplateContext)
62 */
63 public class MelatiWebmacroStringWriter extends MelatiStringWriter
64 implements MelatiWebmacroWriter {
65
66 /**
67 * @return a <code>FastWriter</code> that can be used for a while.
68 *
69 * {@inheritDoc}
70 * @see #stopUsingFastWriter
71 * @see org.melati.template.webmacro.MelatiWebmacroWriter#getFastWriter
72 * (org.melati.template.TemplateEngine)
73 */
74 public org.webmacro.FastWriter getFastWriter() {
75 // All we want to do is efficiently convert to and from bytes
76 // in an encoding that works for all Java characters.
77 // Sun's Javadocs java.nio.charset.Charset explains this well
78 // where other references fail to spell it out: UTF-16 is cool.
79 // Except Webmacro does not support it due to byte order mark.
80 // So Jim used UTF-16BE
81 // Changed to default in the desperate hope of getting something to work
82 try {
83 return org.webmacro.FastWriter.getInstance(Broker.getBroker(), Melati.DEFAULT_ENCODING);
84 }
85 catch (UnsupportedEncodingException e) {
86 throw new MelatiBugMelatiException(
87 "Assumption that all JVMs and WebMacro support " + Melati.DEFAULT_ENCODING + " has not held", e);
88 } catch (InitException e) {
89 throw new MelatiBugMelatiException(
90 "Problem initialising WebMacro", e);
91 }
92 }
93
94 /**
95 * Stop using the given <code>FastWriter</code> obtained from
96 * this object.
97 */
98 public void stopUsingFastWriter(org.webmacro.FastWriter fw) {
99 try {
100 write(fw.toString());
101 } catch (IOException e) {
102 throw new TemplateIOException(e);
103 }
104 try {
105 fw.close();
106 } catch (IOException e) {
107 throw new TemplateIOException(e);
108 }
109 }
110
111 }