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19
20 package org.apache.james.transport.matchers;
21
22 import org.apache.mailet.GenericMatcher;
23 import org.apache.mailet.Mail;
24
25 import java.util.Collection;
26
27 /***
28 * use: <mailet match="HasHeader=<header>" class="..." />
29 *
30 * This matcher simply checks to see if the header named is present.
31 * If complements the AddHeader mailet.
32 *
33 * TODO: support lists of headers and values, e.g, match="{<header>[=value]}+"
34 * [will require a complete rewrite from the current trivial one-liner]
35 *
36 */
37 public class HasHeader extends GenericMatcher {
38
39 public Collection match(Mail mail) throws javax.mail.MessagingException {
40 return (mail.getMessage().getHeader(getCondition(), null) != null) ? mail.getRecipients() : null;
41 }
42 }
43