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package org.zeroturnaround.javarebel.integration.weblogic;

import org.zeroturnaround.bundled.javassist.ClassPool;
import org.zeroturnaround.bundled.javassist.CtClass;
import org.zeroturnaround.bundled.javassist.CtMethod;
import org.zeroturnaround.bundled.javassist.NotFoundException;
import org.zeroturnaround.javarebel.integration.support.JavassistClassBytecodeProcessor;

/**
 * Transforms weblogic.diagnostics.debug.DebugLogger.
 * 
 * @author Jevgeni Kabanov
 */
public class DebugLoggerCBP extends JavassistClassBytecodeProcessor {

  public void process(ClassPool cp, ClassLoader cl, CtClass ctClass) throws Exception {
    cp.importPackage("org.zeroturnaround.javarebel");
    try {
      CtMethod logMethod = ctClass.getDeclaredMethod("log");
      
      if (logMethod.getParameterTypes().length < 3) return;
      if (!logMethod.getParameterTypes()[1].getName().equals(String.class.getName())) return;
      if (!logMethod.getParameterTypes()[2].getName().equals(Throwable.class.getName())) return;
      
      logMethod.insertBefore(
          "{" +
          "  LoggerFactory.getInstance().trace(\" \" + $2);" +
          "  if ($3 != null) LoggerFactory.getInstance().errorTrace($3);" +
          "}");
    } catch (NotFoundException e) {
    }
  }
}