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.matchers;
19
20 import org.apache.mailet.GenericMatcher;
21 import org.apache.mailet.Mail;
22
23 import java.util.Collection;
24
25 /***
26 * use: <mailet match="HasHeader=<header>" class="..." />
27 *
28 * This matcher simply checks to see if the header named is present.
29 * If complements the AddHeader mailet.
30 *
31 * TODO: support lists of headers and values, e.g, match="{<header>[=value]}+"
32 * [will require a complete rewrite from the current trivial one-liner]
33 *
34 */
35 public class HasHeader extends GenericMatcher {
36
37 public Collection match(Mail mail) throws javax.mail.MessagingException {
38 return (mail.getMessage().getHeader(getCondition(), null) != null) ? mail.getRecipients() : null;
39 }
40 }
41