ProfilingClassAdapter.java

package com.ikokoon.serenity.instrumentation.profiling;

import org.objectweb.asm.ClassAdapter;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.MethodAdapter;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.commons.AdviceAdapter;

import com.ikokoon.serenity.IConstants;

/**
 * This class is not used. It has been replaced with the advice adapter class.
 *
 * @author Michael Couck
 * @since 30.09.09
 * @version 01.00
 */
public class ProfilingClassAdapter extends ClassAdapter implements Opcodes {

	private String className;

	public ProfilingClassAdapter(ClassVisitor visitor, String className) {
		super(visitor);
		this.className = className;
	}

	public MethodVisitor visitMethod(int access, final String methodName, final String methodDescription, String methodSignature, String[] exceptions) {
		MethodVisitor methodVisitor = super.visitMethod(access, methodName, methodDescription, methodSignature, exceptions);
		// MethodVisitor methodVisitor, Integer access, String className, String methodName, String methodDescription
		if (methodName.equals("<init>") || methodName.equals("<clinit>")) {
			MethodAdapter methodAdapter = new AdviceAdapter(methodVisitor, access, methodName, methodDescription) {
				@Override
				protected void onMethodEnter() {
					this.visitLdcInsn(className);
					this.visitLdcInsn(methodName);
					this.visitLdcInsn(methodDescription);
					this.visitMethodInsn(Opcodes.INVOKESTATIC, IConstants.COLLECTOR_CLASS_NAME, IConstants.COLLECT_START,
							IConstants.PROFILING_METHOD_DESCRIPTION);
				}

				@Override
				protected void onMethodExit(int opcode) {
					this.visitLdcInsn(className);
					this.visitLdcInsn(methodName);
					this.visitLdcInsn(methodDescription);
					this.visitMethodInsn(Opcodes.INVOKESTATIC, IConstants.COLLECTOR_CLASS_NAME, IConstants.COLLECT_END,
							IConstants.PROFILING_METHOD_DESCRIPTION);
				}
			};
			return methodAdapter;
		}
		MethodAdapter methodAdapter = new ProfilingMethodAdapter(methodVisitor, access, className, methodName, methodDescription);
		return methodAdapter;
	}

}