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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   * @version 1.0.0, 04/12/2000
27   */
28  public class IsSingleRecipient extends GenericMatcher {
29  
30      public Collection match(Mail mail) {
31          if (mail.getRecipients().size() == 1) {
32              return mail.getRecipients();
33          } else {
34              return null;
35          }
36      }
37  }