1 /****************************************************************
2 * Licensed to the Apache Software Foundation (ASF) under one *
3 * or more contributor license agreements. See the NOTICE file *
4 * distributed with this work for additional information *
5 * regarding copyright ownership. The ASF licenses this file *
6 * to you under the Apache License, Version 2.0 (the *
7 * "License"); you may not use this file except in compliance *
8 * with the License. You may obtain a copy of the License at *
9 * *
10 * http://www.apache.org/licenses/LICENSE-2.0 *
11 * *
12 * Unless required by applicable law or agreed to in writing, *
13 * software distributed under the License is distributed on an *
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
15 * KIND, either express or implied. See the License for the *
16 * specific language governing permissions and limitations *
17 * under the License. *
18 ****************************************************************/
19
20
21
22 package org.apache.james.transport.matchers;
23
24 import org.apache.mailet.base.GenericMatcher;
25 import org.apache.mailet.Mail;
26
27 import javax.mail.MessagingException;
28 import java.util.Collection;
29 import java.util.Locale;
30
31 /**
32 * Checks whether the message (entire message, not just content) is greater
33 * than a certain number of bytes. You can use 'k' and 'm' as optional postfixes.
34 * In other words, "1m" is the same as writing "1024k", which is the same as
35 * "1048576".
36 *
37 */
38 public class SizeGreaterThan extends GenericMatcher {
39
40 int cutoff = 0;
41
42 public void init() throws MessagingException {
43 String amount = getCondition();
44
45 if (amount != null) {
46 amount = amount.trim().toLowerCase(Locale.US);
47 } else {
48 throw new MessagingException("Please configure an amount");
49 }
50 try {
51 if (amount.endsWith("k")) {
52 amount = amount.substring(0, amount.length() - 1);
53 cutoff = Integer.parseInt(amount) * 1024;
54 } else if (amount.endsWith("m")) {
55 amount = amount.substring(0, amount.length() - 1);
56 cutoff = Integer.parseInt(amount) * 1024 * 1024;
57 } else {
58 cutoff = Integer.parseInt(amount);
59 }
60 } catch (NumberFormatException e) {
61 throw new MessagingException("Invalid amount: " + amount);
62 }
63 }
64
65 /**
66 * @see org.apache.mailet.GenericMatcher#match(org.apache.mailet.Mail)
67 */
68 public Collection match(Mail mail) throws MessagingException {
69 if (mail.getMessageSize() > cutoff) {
70 return mail.getRecipients();
71 } else {
72 return null;
73 }
74 }
75 }