1 /*
2 * $Source$
3 * $Revision$
4 *
5 * Copyright (C) 2000 Tim Joyce
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 * Tim Joyce <timj At paneris.org>
42 * http://paneris.org/
43 */
44
45 package org.melati.template.velocity;
46
47 import org.melati.util.MelatiBugMelatiException;
48 import org.melati.util.MelatiWriter;
49 import org.melati.template.TemplateContext;
50 import org.melati.template.TemplateEngineException;
51
52 import org.apache.velocity.VelocityContext;
53 import org.apache.velocity.exception.ParseErrorException;
54 import org.apache.velocity.exception.ResourceNotFoundException;
55 import org.apache.velocity.runtime.RuntimeSingleton;
56
57 /**
58 * A Velocity Template for use with Melati.
59 */
60
61 public class VelocityTemplate implements org.melati.template.Template {
62 private org.apache.velocity.Template template;
63
64 /**
65 * Constructor.
66 * @param templateName name or Template
67 * @throws ParseErrorException if there is a problem paring the template
68 * @throws ResourceNotFoundException if the template is not found
69 */
70 public VelocityTemplate(String templateName)
71 throws ParseErrorException, ResourceNotFoundException {
72 try {
73 template = RuntimeSingleton.getTemplate(templateName);
74 } catch (ResourceNotFoundException e) {
75 throw e;
76 } catch (ParseErrorException e) {
77 throw e;
78 } catch (Exception e) {
79 throw new MelatiBugMelatiException("Problem getting Velocity template", e);
80 }
81 }
82
83 /**
84 * {@inheritDoc}
85 * @see org.melati.template.Template#write
86 * (org.melati.util.MelatiWriter, org.melati.template.TemplateContext)
87 */
88 public void write(MelatiWriter out, TemplateContext templateContext) throws TemplateEngineException {
89 try {
90 template.merge((VelocityContext)templateContext.getContext(),out);
91 } catch (Exception e) {
92 throw new TemplateEngineException(e);
93 }
94 }
95
96 }