1 /************************************************************************
2 * Copyright (c) 2000-2006 The Apache Software Foundation. *
3 * All rights reserved. *
4 * ------------------------------------------------------------------- *
5 * Licensed under the Apache License, Version 2.0 (the "License"); you *
6 * may not use this file except in compliance with the License. You *
7 * may obtain a copy of the License at: *
8 * *
9 * http://www.apache.org/licenses/LICENSE-2.0 *
10 * *
11 * Unless required by applicable law or agreed to in writing, software *
12 * distributed under the License is distributed on an "AS IS" BASIS, *
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or *
14 * implied. See the License for the specific language governing *
15 * permissions and limitations under the License. *
16 ***********************************************************************/
17
18 package org.apache.james.transport;
19 import javax.mail.MessagingException;
20
21 import org.apache.avalon.framework.configuration.Configuration;
22 import org.apache.avalon.framework.configuration.ConfigurationException;
23 import org.apache.james.core.MatcherConfigImpl;
24 import org.apache.james.services.MatcherLoader;
25 import org.apache.mailet.MailetException;
26 import org.apache.mailet.Matcher;
27 /***
28 * Loads Matchers for use inside James.
29 *
30 */
31 public class JamesMatcherLoader extends Loader implements MatcherLoader {
32 /***
33 * @see org.apache.avalon.framework.configuration.Configurable#configure(Configuration)
34 */
35 public void configure(Configuration conf) throws ConfigurationException {
36 getPackages(conf,MATCHER_PACKAGE);
37 }
38
39
40
41
42 public Matcher getMatcher(String matchName) throws MessagingException {
43 try {
44 String condition = (String) null;
45 int i = matchName.indexOf('=');
46 if (i != -1) {
47 condition = matchName.substring(i + 1);
48 matchName = matchName.substring(0, i);
49 }
50 for (i = 0; i < packages.size(); i++) {
51 String className = (String) packages.elementAt(i) + matchName;
52 try {
53 MatcherConfigImpl configImpl = new MatcherConfigImpl();
54 configImpl.setMatcherName(matchName);
55 configImpl.setCondition(condition);
56 configImpl.setMailetContext(mailetContext);
57 Matcher matcher = (Matcher) Thread.currentThread().getContextClassLoader().loadClass(className).newInstance();
58 matcher.init(configImpl);
59 return matcher;
60 } catch (ClassNotFoundException cnfe) {
61
62 }
63 }
64 StringBuffer exceptionBuffer =
65 new StringBuffer(128)
66 .append("Requested matcher not found: ")
67 .append(matchName)
68 .append(". looked in ")
69 .append(packages.toString());
70 throw new ClassNotFoundException(exceptionBuffer.toString());
71 } catch (MessagingException me) {
72 throw me;
73 } catch (Exception e) {
74 StringBuffer exceptionBuffer =
75 new StringBuffer(128).append("Could not load matcher (").append(matchName).append(
76 ")");
77 throw new MailetException(exceptionBuffer.toString(), e);
78 }
79 }
80 }