1 /**
2 * MicroEmulator
3 * Copyright (C) 2006-2007 Bartek Teodorczyk <barteo@barteo.net>
4 * Copyright (C) 2006-2007 Vlad Skarzhevskyy
5 *
6 * It is licensed under the following two licenses as alternatives:
7 * 1. GNU Lesser General Public License (the "LGPL") version 2.1 or any newer version
8 * 2. Apache License (the "AL") Version 2.0
9 *
10 * You may not use this file except in compliance with at least one of
11 * the above two licenses.
12 *
13 * You may obtain a copy of the LGPL at
14 * http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
15 *
16 * You may obtain a copy of the AL at
17 * http://www.apache.org/licenses/LICENSE-2.0
18 *
19 * Unless required by applicable law or agreed to in writing, software
20 * distributed under the License is distributed on an "AS IS" BASIS,
21 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 * See the LGPL or the AL for the specific language governing permissions and
23 * limitations.
24 *
25 * @version $Id: ClassPreprocessor.java 1605 2008-02-25 21:07:14Z barteo $
26 */
27 package org.microemu.app.classloader;
28
29 import java.io.IOException;
30 import java.io.InputStream;
31
32 import org.microemu.log.Logger;
33 import org.objectweb.asm.ClassReader;
34 import org.objectweb.asm.ClassVisitor;
35 import org.objectweb.asm.ClassWriter;
36
37 /**
38 * @author vlads
39 *
40 */
41 public class ClassPreprocessor {
42
43 public static byte[] instrument(final InputStream classInputStream, InstrumentationConfig config) {
44 try {
45 ClassReader cr = new ClassReader(classInputStream);
46 ClassWriter cw = new ClassWriter(0);
47 ClassVisitor cv = new ChangeCallsClassVisitor(cw, config);
48 cr.accept(cv, 0);
49 return cw.toByteArray();
50 } catch (IOException e) {
51 Logger.error("Error loading MIDlet class", e);
52 return null;
53 }
54 }
55
56 }