01: /***
02: * Retrotranslator: a Java bytecode transformer that translates Java classes
03: * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
04: *
05: * Copyright (c) 2005 - 2008 Taras Puchko
06: * All rights reserved.
07: *
08: * Redistribution and use in source and binary forms, with or without
09: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the copyright holders nor the names of its
17: * contributors may be used to endorse or promote products derived from
18: * this software without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30: * THE POSSIBILITY OF SUCH DAMAGE.
31: */package net.sf.retrotranslator.transformer;
32:
33: /**
34: * @author Taras Puchko
35: */
36: class JRockitJITRetrotranslator {
37:
38: private static class ClassPreProcessorImpl implements
39: ClassPreProcessor {
40:
41: private final ClassTransformer transformer;
42: private final ClassPreProcessor delegate;
43:
44: public ClassPreProcessorImpl(ClassTransformer transformer,
45: ClassPreProcessor delegate) {
46: this .transformer = transformer;
47: this .delegate = delegate;
48: }
49:
50: public byte[] preProcess(ClassLoader classLoader,
51: String string, byte[] bytes) {
52: bytes = transformer.transform(bytes, 0, bytes.length);
53: return delegate != null ? delegate.preProcess(classLoader,
54: string, bytes) : bytes;
55: }
56: }
57:
58: public static void install(ClassTransformer transformer) {
59: try {
60: Class jvmFactoryClass = Class
61: .forName("com.bea.jvm.JVMFactory");
62: Object jvm = jvmFactoryClass.getMethod("getJVM").invoke(
63: null);
64: Object classLibrary = jvm.getClass().getMethod(
65: "getClassLibrary").invoke(jvm);
66: ClassPreProcessor preProcessor = (ClassPreProcessor) classLibrary
67: .getClass().getMethod("getClassPreProcessor")
68: .invoke(classLibrary);
69: if (!(preProcessor instanceof ClassPreProcessorImpl)) {
70: classLibrary.getClass()
71: .getMethod("setClassPreProcessor",
72: ClassPreProcessor.class).invoke(
73: classLibrary,
74: new ClassPreProcessorImpl(transformer,
75: preProcessor));
76: }
77: } catch (Throwable e) {
78: // ignore
79: }
80: }
81: }
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