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Java > Open Source Codes > org > jboss > iiop > StubClassLoader


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.iiop;
23
24 import org.jboss.logging.Logger;
25 import org.jboss.proxy.compiler.IIOPStubCompiler;
26
27 /**
28  * This class loader dynamically generates and loads client stub classes.
29  * It is intended to be used by clients, as an interim solution.
30  * Should not be necessary when the IORs contain a JAVA_CODE_BASE tag.
31  *
32  * @author <a HREF="mailto:reverbel@ime.usp.br">Francisco Reverbel</a>
33  * @version $Revision: 37459 $
34  */
35 public class StubClassLoader
36       extends ClassLoader JavaDoc
37 {
38
39    // Static ------------------------------------------------------------------
40
41    private static final Logger logger =
42                           Logger.getLogger(StubClassLoader.class);
43
44    // Constructor -------------------------------------------------------------
45
46    public StubClassLoader(ClassLoader JavaDoc parent)
47    {
48       super(parent);
49    }
50
51    // Protected ---------------------------------------------------------------
52
53    protected Class JavaDoc findClass(String JavaDoc name)
54          throws ClassNotFoundException JavaDoc
55    {
56       logger.debug("findClass(" + name + ") called");
57       if (name.endsWith("_Stub")) {
58          int start = name.lastIndexOf('.') + 1;
59          if (name.charAt(start) == '_') {
60             String JavaDoc pkg = name.substring(0, start);
61             String JavaDoc interfaceName = pkg + name.substring(start + 1,
62                                                         name.length() - 5);
63             logger.debug("interface name " + interfaceName);
64             Class JavaDoc intf = loadClass(interfaceName);
65             logger.debug("loaded class " + interfaceName);
66
67             try {
68                byte[] code = IIOPStubCompiler.compile(intf, name);
69                
70                logger.debug("compiled stub class for " + interfaceName);
71                Class JavaDoc clz = defineClass(name, code, 0, code.length);
72                logger.debug("defined stub class for " + interfaceName);
73                resolveClass(clz);
74                logger.debug("resolved stub class for " + interfaceName);
75                return clz;
76             }
77             catch (RuntimeException JavaDoc e) {
78                logger.debug("Exception generating IIOP stub " + name, e);
79                throw e;
80             }
81          }
82       }
83       throw new ClassNotFoundException JavaDoc(name);
84    }
85
86 }
87
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