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Java > Open Source Codes > org > jboss > aspects > versioned > DistributedFieldUpdate


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10   * the License, or (at your option) any later version.
11   *
12   * This software is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   * Lesser General Public License for more details.
16   *
17   * You should have received a copy of the GNU Lesser General Public
18   * License along with this software; if not, write to the Free
19   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21   */
22 package org.jboss.aspects.versioned;
23 import org.jboss.aop.InstanceAdvised;
24 import org.jboss.util.id.GUID;
25
26 public class DistributedFieldUpdate implements java.io.Serializable JavaDoc
27 {
28    private static final long serialVersionUID = -8249659475610689146L;
29    
30    protected Object JavaDoc val;
31    protected long version;
32    protected int index;
33
34    public DistributedFieldUpdate() {}
35    public DistributedFieldUpdate(Object JavaDoc val, long version, int index)
36    {
37       setValue(val);
38       this.version = version;
39       this.index = index;
40    }
41    public long getVersionId() { return version; }
42    public void setVersionId(long newId) { version = newId; }
43    public int getFieldIndex() { return index; }
44
45
46    public boolean equals(Object JavaDoc obj)
47    {
48       DistributedFieldUpdate update = (DistributedFieldUpdate)obj;
49       return update.index == this.index;
50    }
51
52    public int hashCode()
53    {
54       return index;
55    }
56
57
58    public Object JavaDoc getValue()
59    {
60       if (val instanceof VersionReference)
61       {
62          return ((VersionReference)val).get();
63       }
64       return val;
65    }
66    public void setValue(Object JavaDoc newVal)
67    {
68       if (newVal instanceof InstanceAdvised)
69       {
70          InstanceAdvised advised = (InstanceAdvised)newVal;
71          GUID guid = VersionManager.getGUID(advised);
72          if (guid != null)
73          {
74             // we are versioned
75 val = new VersionReference(guid, advised);
76             return;
77          }
78          
79       }
80       val = newVal;
81    }
82    public Object JavaDoc getNonDereferencedValue()
83    {
84       return val;
85    }
86 }
87
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