/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.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: 1.2 $
 */
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");
      }
   }
}
