1   /***
2    * Redistribution and use of this software and associated documentation
3    * ("Software"), with or without modification, are permitted provided
4    * that the following conditions are met:
5    *
6    * 1. Redistributions of source code must retain copyright
7    *    statements and notices.  Redistributions must also contain a
8    *    copy of this document.
9    *
10   * 2. Redistributions in binary form must reproduce the
11   *    above copyright notice, this list of conditions and the
12   *    following disclaimer in the documentation and/or other
13   *    materials provided with the distribution.
14   *
15   * 3. The name "Exolab" must not be used to endorse or promote
16   *    products derived from this Software without prior written
17   *    permission of Exoffice Technologies.  For written permission,
18   *    please contact info@exolab.org.
19   *
20   * 4. Products derived from this Software may not be called "Exolab"
21   *    nor may "Exolab" appear in their names without prior written
22   *    permission of Exoffice Technologies. Exolab is a registered
23   *    trademark of Exoffice Technologies.
24   *
25   * 5. Due credit should be given to the Exolab Project
26   *    (http://www.exolab.org/).
27   *
28   * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29   * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30   * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31   * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
32   * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39   * OF THE POSSIBILITY OF SUCH DAMAGE.
40   *
41   * Copyright 2004 (C) Exoffice Technologies Inc. All Rights Reserved.
42   *
43   * $Id: RecursiveCallback.java,v 1.1 2005/04/02 13:50:16 tanderson Exp $
44   */
45  package org.exolab.jms.net.invoke;
46  
47  
48  import org.exolab.jms.net.CallbackService;
49  
50  
51  /***
52   * Callback which is invoked recursively.
53   *
54   * @version     $Revision: 1.1 $ $Date: 2005/04/02 13:50:16 $
55   * @author      <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
56   */
57  public class RecursiveCallback extends LoggingCallback {
58  
59      /***
60       * The callback service.
61       */
62      private final CallbackService _service;
63  
64      /***
65       * The depth of recursion.
66       */
67      private final int _depth;
68  
69      /***
70       * The no. of times invoked. On reaching {@link #_depth}, is reset to
71       * <code>0</code>.
72       */
73      private int _count;
74  
75  
76      /***
77       * Construct a new <code>RecursiveCallback</code>.
78       *
79       * @param depth the depth of the recursion
80       */
81      public RecursiveCallback(CallbackService service, int depth) {
82          _service = service;
83          _depth = depth;
84      }
85  
86      /***
87       * Invoke the callback
88       *
89       * @param object the invocation data
90       */
91      public void invoke(Object object) {
92          super.invoke(object);
93          if (++_count < _depth) {
94              _service.invoke(object);
95          } else {
96              _count = 0;
97          }
98      }
99  
100 
101 }