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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 2000,2003 (C) Exoffice Technologies Inc. All Rights Reserved.
42   *
43   * $Id: Priority.java,v 1.1 2004/11/26 01:50:43 tanderson Exp $
44   *
45   * Date         Author  Changes
46   * 02/26/2000   jimm    Created
47   */
48  
49  package org.exolab.jms.message;
50  
51  import java.io.Externalizable;
52  import java.io.IOException;
53  import java.io.ObjectInput;
54  import java.io.ObjectOutput;
55  
56  import javax.jms.JMSException;
57  
58  
59  /***
60   * Wrapper for JMSPriority
61   *
62   * @version     $Revision: 1.1 $ $Date: 2004/11/26 01:50:43 $
63   * @author      <a href="mailto:mourikis@exolab.org">Jim Mourikis</a>
64   */
65  public class Priority implements Externalizable {
66  
67      // Version Id used for streaming
68      static final long serialVersionUID = 1;
69  
70      private int priority_ = 0;
71  
72      public Priority() {
73  
74      }
75  
76      public Priority(int priority) throws JMSException {
77          if (priority >= 0 && priority < 10) {
78              priority_ = priority;
79          } else {
80              throw new JMSException("Invalid priority");
81          }
82      }
83  
84  
85      // Marshall out
86      public void writeExternal(ObjectOutput out) throws IOException {
87          out.writeLong(serialVersionUID);
88          out.writeInt(priority_);
89      }
90  
91  
92      // Marshall in
93      public void readExternal(ObjectInput in)
94          throws IOException, ClassNotFoundException {
95          long version = in.readLong();
96          if (version == serialVersionUID) {
97              priority_ = in.readInt();
98          } else {
99              throw new IOException("Incorrect version enountered: " +
100                 version + " This version = " +
101                 serialVersionUID);
102         }
103     }
104 
105 
106     public int getPriority() {
107         return priority_;
108     }
109 
110     // expedited messages shouldbe delivered ahead of normal
111     public boolean isExpedited() {
112         return (priority_ >= 5 ? true : false);
113     }
114 
115     // Comparisons
116     public boolean isGreater(Priority toCompare) {
117         return (priority_ > toCompare.priority_);
118     }
119 
120     // Comparisons
121     public boolean isEqual(Priority toCompare) {
122         return (priority_ == toCompare.priority_);
123     }
124 }
125