/*
 * JBoss, the OpenSource J2EE webOS
 *
 * Distributable under LGPL license.
 * See terms of license at gnu.org.
 */

import org.jboss.aop.joinpoint.Invocation;
import org.jboss.aop.joinpoint.MethodInvocation;
import org.jboss.aop.joinpoint.ConstructorInvocation;
import org.jboss.aop.joinpoint.FieldInvocation;
import org.jboss.aop.joinpoint.FieldReadInvocation;
import org.jboss.aop.joinpoint.FieldWriteInvocation;
import org.jboss.aop.advice.Interceptor;
import org.jboss.aop.annotation.AnnotationElement;
/**
 *
 * @author <a href="mailto:bill@jboss.org">Bill Burke</a>
 * @version $Revision: 1.1 $
 */
public class TraceInterceptor implements Interceptor
{
   public String getName() { return "TraceInterceptor"; }

   private void printSingle(single s)
   {
      System.out.println("@single (\"" + s.value() + "\")");
   }

   private void printComplex(complex c)
   {
      System.out.print("@complex (ch='" + c.ch() + "', ");
      System.out.print("\"" + c.string() + "\", ");
      System.out.print("flt=" + c.flt() + ", ");
      System.out.println("dbl=" + c.dbl() + ", ...blah blah blah YOU GET THE IDEA...");
      
   }

   public Object invoke(Invocation invocation) throws Throwable
   {
      String msg = "";
      if (invocation instanceof MethodInvocation)
      {
         msg = "executing method " + ((MethodInvocation)invocation).getMethod().toString();
         single s = (single)AnnotationElement.getAnyAnnotation(((MethodInvocation)invocation).getMethod(), single.class);
         printSingle(s);
         complex c = (complex)AnnotationElement.getAnyAnnotation(((MethodInvocation)invocation).getMethod(), complex.class);
         printComplex(c);
      }
      else if (invocation instanceof ConstructorInvocation)
      {
         msg = "executing constructor " + ((ConstructorInvocation)invocation).getConstructor();
         single s = (single)AnnotationElement.getAnyAnnotation(((ConstructorInvocation)invocation).getConstructor(), single.class);
         printSingle(s);
         complex c = (complex)AnnotationElement.getAnyAnnotation(((ConstructorInvocation)invocation).getConstructor(), complex.class);
         printComplex(c);
      }
      else if (invocation instanceof FieldReadInvocation)
      {
         msg = "read field name: " + ((FieldReadInvocation)invocation).getField();
         single s = (single)AnnotationElement.getAnyAnnotation(((FieldInvocation)invocation).getField(), single.class);
         printSingle(s);
         complex c = (complex)AnnotationElement.getAnyAnnotation(((FieldInvocation)invocation).getField(), complex.class);
         printComplex(c);
      }
      else if (invocation instanceof FieldWriteInvocation)
      {
         msg = "write field name: " + ((FieldWriteInvocation)invocation).getField();
         single s = (single)AnnotationElement.getAnyAnnotation(((FieldInvocation)invocation).getField(), single.class);
         printSingle(s);
         complex c = (complex)AnnotationElement.getAnyAnnotation(((FieldInvocation)invocation).getField(), complex.class);
         printComplex(c);
      }

      try
      {
         System.out.println("<<< Trace : " + msg);
         return invocation.invokeNext();
      }
      finally
      {
         System.out.println(">>> Leaving Trace");
      }
   }
}