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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: ChangeCallsClassVisitor.java 2092 2009-06-13 10:14:45Z barteo $
 */
package org.microemu.app.classloader;

import java.util.HashMap;
import java.util.Map;

import org.microemu.app.util.MIDletThread;
import org.microemu.app.util.MIDletTimer;
import org.microemu.app.util.MIDletTimerTask;
import org.microemu.log.Logger;
import org.objectweb.asm.ClassAdapter;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.MethodVisitor;

/**
 * @author vlads
 * 
 */
public class ChangeCallsClassVisitor extends ClassAdapter {

	InstrumentationConfig config;

	static final Map javaVersion = new HashMap();

	static {
		javaVersion.put(new Integer(0x3002D), "1.1");
		javaVersion.put(new Integer(0x3002E), "1.2");
		javaVersion.put(new Integer(47), "1.3");
		javaVersion.put(new Integer(48), "1.4");
		javaVersion.put(new Integer(49), "1.5");
		javaVersion.put(new Integer(50), "1.6");
	}

	public ChangeCallsClassVisitor(ClassVisitor cv, InstrumentationConfig config) {
		super(cv);
		this.config = config;
	}

	public void visit(final int version, final int access, final String name, final String signature, String superName,
			final String[] interfaces) {
		if ((0xFF & version) >= 49) {
			String v = (String) javaVersion.get(new Integer(version));
			Logger.warn("Loading MIDlet class " + name + " of version " + version + ((v == null) ? "" : (" " + v)));
		}
		if (config.isEnhanceThreadCreation()) {
			if (superName.equals("java/lang/Thread")) {
				superName = ChangeCallsMethodVisitor.codeName(MIDletThread.class);
			} else if (superName.equals("java/util/Timer")) {
				superName = ChangeCallsMethodVisitor.codeName(MIDletTimer.class);
			} else if (superName.equals("java/util/TimerTask")) {
				superName = ChangeCallsMethodVisitor.codeName(MIDletTimerTask.class);
			}
		}
		super.visit(version, access, name, signature, superName, interfaces);
	}

	public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature,
			final String[] exceptions) {
		return new ChangeCallsMethodVisitor(super.visitMethod(access, name, desc, signature, exceptions), config);
	}

}