| ServletVelocityResourceListener.java |
1 /**
2 * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 package com.liferay.portal.velocity;
24
25 import com.liferay.portal.kernel.util.Validator;
26 import com.liferay.portal.util.PortalUtil;
27
28 import java.io.ByteArrayInputStream;
29 import java.io.InputStream;
30
31 import javax.servlet.ServletContext;
32
33 import org.apache.commons.logging.Log;
34 import org.apache.commons.logging.LogFactory;
35 import org.apache.velocity.exception.ResourceNotFoundException;
36
37 /**
38 * <a href="ServletVelocityResourceListener.java.html"><b><i>View Source</i></b>
39 * </a>
40 *
41 * @author Alexander Chow
42 *
43 */
44 public class ServletVelocityResourceListener extends VelocityResourceListener {
45
46 public InputStream getResourceStream(String source)
47 throws ResourceNotFoundException {
48
49 InputStream is = null;
50
51 int pos = source.indexOf(SERVLET_SEPARATOR);
52
53 if (pos != -1) {
54 String ctxName = source.substring(0, pos);
55
56 if (Validator.isNull(ctxName)) {
57 ctxName = PortalUtil.getPathContext();
58 }
59
60 ServletContext ctx = VelocityContextPool.get(ctxName);
61
62 if (ctx != null) {
63 String name =
64 source.substring(pos + SERVLET_SEPARATOR.length());
65
66 if (_log.isDebugEnabled()) {
67 _log.debug(
68 name + " is associated with the servlet context " +
69 ctxName + " " + ctx);
70 }
71
72 is = ctx.getResourceAsStream(name);
73
74 if ((is == null) && (name.endsWith("/init_custom.vm"))) {
75 if (_log.isWarnEnabled()) {
76 _log.warn(
77 "The template " + name + " should be created");
78 }
79
80 is = new ByteArrayInputStream(new byte[0]);
81 }
82 }
83 else {
84 _log.error(
85 source + " is not valid because " + ctxName +
86 " does not map to a servlet context");
87 }
88 }
89
90 return is;
91 }
92
93 private static Log _log =
94 LogFactory.getLog(ServletVelocityResourceListener.class);
95
96 }