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Java > Open Source Codes > com > caucho > ejb > hessian > ObjectStub


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.ejb.hessian;
30
31 import com.caucho.ejb.RemoteExceptionWrapper;
32
33 import javax.ejb.EJBHome JavaDoc;
34 import javax.ejb.EJBObject JavaDoc;
35 import javax.ejb.Handle JavaDoc;
36 import javax.ejb.RemoveException JavaDoc;
37 import java.rmi.RemoteException JavaDoc;
38
39 /**
40  * Base class for generated object stubs.
41  */
42 public abstract class ObjectStub extends HessianStub implements EJBObject JavaDoc {
43   protected transient Handle JavaDoc _handle;
44
45   abstract public String JavaDoc getHessianType();
46   
47   /**
48    * Returns the serializable handle for the remote object
49    */
50   public Handle JavaDoc getHandle()
51     throws RemoteException JavaDoc
52   {
53     if (_handle == null)
54       _handle = _client.createHandle(_url);
55     
56     return _handle;
57   }
58
59   /**
60    * Returns the EJBHome stub for the remote object.
61    */
62   public EJBHome JavaDoc getEJBHome()
63     throws RemoteException JavaDoc
64   {
65     try {
66       return _client.getHomeStub();
67     } catch (Exception JavaDoc e) {
68       throw new RemoteExceptionWrapper(e);
69     }
70   }
71
72   /**
73    * Returns true if the test object is identical to this object.
74    *
75    * @param obj the object to test for identity
76    */
77   public boolean isIdentical(EJBObject JavaDoc obj)
78     throws RemoteException JavaDoc
79   {
80     return getHandle().equals(obj.getHandle()) || _ejb_isIdentical(obj);
81   }
82
83   /**
84    * Remove this object from the server.
85    */
86   public void remove()
87     throws RemoteException JavaDoc, RemoveException JavaDoc
88   {
89     _ejb_remove();
90   }
91
92   /**
93    * For entity beans, returns the primary key
94    */
95   public Object JavaDoc getPrimaryKey()
96     throws RemoteException JavaDoc
97   {
98     // XXX: the primary key could be cached
99 return _ejb_getPrimaryKey();
100   }
101
102   protected EJBHome JavaDoc _ejb_getEJBHome() throws RemoteException JavaDoc
103   {
104     return null;
105   }
106
107   protected boolean _ejb_isIdentical(EJBObject JavaDoc obj) throws RemoteException JavaDoc
108   {
109     return false;
110   }
111
112   protected void _ejb_remove() throws RemoteException JavaDoc, RemoveException JavaDoc
113   {
114   }
115
116   protected Object JavaDoc _ejb_getPrimaryKey() throws RemoteException JavaDoc
117   {
118     return null;
119   }
120 }
121
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