JMXAttributeNotificationIndexSupport


1   /*_############################################################################
2     _##
3     _##  SNMP4J-AgentJMX - JMXAttributeNotificationIndexSupport.java
4     _##
5     _##  Copyright (C) 2006-2007  Frank Fock (SNMP4J.org)
6     _##
7     _##  This program is free software; you can redistribute it and/or modify
8     _##  it under the terms of the GNU General Public License version 2 as
9     _##  published by the Free Software Foundation.
10    _##
11    _##  This program is distributed in the hope that it will be useful,
12    _##  but WITHOUT ANY WARRANTY; without even the implied warranty of
13    _##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    _##  GNU General Public License for more details.
15    _##
16    _##  You should have received a copy of the GNU General Public License
17    _##  along with this program; if not, write to the Free Software
18    _##  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19    _##  MA  02110-1301  USA
20    _##
21    _##########################################################################*/
22  
23  package org.snmp4j.agent.mo.jmx;
24  
25  import org.snmp4j.smi.OID;
26  import org.snmp4j.agent.mo.jmx.types.TypedAttribute;
27  import javax.management.openmbean.CompositeDataSupport  ;
28  
29  /**
30   * Notification objects can refer to scalar and tabular data. Whereas for scalar
31   * data the OID of the instance is constant, the index portion of the instance
32   * identifier of tabular data may vary from notification to notification.
33   * <p>
34   * The <code>JMXAttributeNotificationIndexSupport</code> provides the index
35   * portion for a notification object by using a <code>JMXIndexSupport</code>
36   * instance. That instance can be shared with the table holding the target
37   * object.
38   *
39   * @author Frank Fock
40   * @version 1.0
41   */
42  public class JMXAttributeNotificationIndexSupport
43      implements JMXNotificationIndexSupport
44  {
45    private TypedAttribute attribute;
46    private JMXIndexSupport indexSupport;
47    private OID index;
48  
49    public JMXAttributeNotificationIndexSupport(TypedAttribute attribute,
50                                                JMXIndexSupport indexSupport) {
51      this.attribute = attribute;
52      this.indexSupport = indexSupport;
53    }
54  
55    public void intialize(Object   notificationUserObject) {
56      Object   key = notificationUserObject;
57      if (notificationUserObject instanceof CompositeDataSupport  ) {
58        key = ((CompositeDataSupport  )
59               notificationUserObject).get(attribute.getName());
60      }
61      index = indexSupport.mapToIndex(key);
62    }
63  
64    public OID getIndex(int objectIndex) {
65      return index;
66    }
67  }
68
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