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.proxy;
23
24 import java.io.Externalizable;
25 import java.lang.reflect.Method;
26
27 import org.jboss.invocation.Invocation;
28 import org.jboss.invocation.Invoker;
29 import org.jboss.proxy.Interceptor;
30
31 /**
32 * Handle toString, equals, hashCode locally on the client.
33 *
34 * @author Scott.Stark@jboss.org
35 * @author adrian@jboss.com
36 * @version $Revision: 37459 $
37 */
38 public class ClientMethodInterceptor extends Interceptor
39 implements Externalizable
40 {
41 /** The serialVersionUID. @since 1.1.2.1 */
42 private static final long serialVersionUID = 6010013004557885014L;
43
44 /** Handle methods locally on the client
45 *
46 * @param mi the invocation
47 * @return the result of the invocation
48 * @throws Throwable for any error
49 */
50 public Object invoke(Invocation mi) throws Throwable
51 {
52 Method m = mi.getMethod();
53 String methodName = m.getName();
54 // Implement local methods
55 if (methodName.equals("toString"))
56 {
57 Object obj = getObject(mi);
58 return obj.toString();
59 }
60 if (methodName.equals("equals"))
61 {
62 Object obj = getObject(mi);
63 Object[] args = mi.getArguments();
64 String thisString = obj.toString();
65 String argsString = args[0] == null ? "" : args[0].toString();
66 return new Boolean(thisString.equals(argsString));
67 }
68 if( methodName.equals("hashCode") )
69 {
70 Object obj = getObject(mi);
71 return new Integer(obj.hashCode());
72 }
73
74 return getNext().invoke(mi);
75 }
76
77 /**
78 * Get the object used in Object methods
79 *
80 * @param mi the invocation
81 * @return the object
82 */
83 protected Object getObject(Invocation mi)
84 {
85 Object cacheId = mi.getInvocationContext().getCacheId();
86 if (cacheId != null)
87 return cacheId;
88 else
89 return mi.getInvocationContext().getInvoker();
90 }
91
92 }
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