org.microemu.app.classloader.ClassPreprocessor Maven / Gradle / Ivy
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/**
* MicroEmulator
* Copyright (C) 2006-2007 Bartek Teodorczyk
* Copyright (C) 2006-2007 Vlad Skarzhevskyy
*
* It is licensed under the following two licenses as alternatives:
* 1. GNU Lesser General Public License (the "LGPL") version 2.1 or any newer version
* 2. Apache License (the "AL") Version 2.0
*
* You may not use this file except in compliance with at least one of
* the above two licenses.
*
* You may obtain a copy of the LGPL at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
*
* You may obtain a copy of the AL at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the LGPL or the AL for the specific language governing permissions and
* limitations.
*
* @version $Id: ClassPreprocessor.java 1605 2008-02-25 21:07:14Z barteo $
*/
package org.microemu.app.classloader;
import java.io.IOException;
import java.io.InputStream;
import org.microemu.log.Logger;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.ClassWriter;
/**
* @author vlads
*
*/
public class ClassPreprocessor {
public static byte[] instrument(final InputStream classInputStream, InstrumentationConfig config) {
try {
ClassReader cr = new ClassReader(classInputStream);
ClassWriter cw = new ClassWriter(0);
ClassVisitor cv = new ChangeCallsClassVisitor(cw, config);
cr.accept(cv, 0);
return cw.toByteArray();
} catch (IOException e) {
Logger.error("Error loading MIDlet class", e);
return null;
}
}
}