/*
 * Created on Feb 22, 2007 Copyright (C) 2001-6, Anthony Harrison anh23@pitt.edu
 * (jactr.org) This library 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 library 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
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA
 */
package org.jactr.tools.tracer.transformer.declarative;

import org.antlr.runtime.tree.CommonTree;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jactr.core.event.IACTREvent;
import org.jactr.core.module.declarative.event.DeclarativeModuleEvent;
import org.jactr.io.resolver.ASTResolver;
import org.jactr.tools.tracer.transformer.IEventTransformer;
import org.jactr.tools.tracer.transformer.ITransformedEvent;

/**
 * @author developer
 */
public class DeclarativeModuleEventTransformer implements IEventTransformer
{
  /**
   * logger definition
   */
  static private final Log LOGGER = LogFactory
                                      .getLog(DeclarativeModuleEventTransformer.class);

  /**
   * @see org.jactr.tools.tracer.transformer.IEventTransformer#transform(IACTREvent)
   */
  public ITransformedEvent transform(IACTREvent actrEvent)
  {
    DeclarativeModuleEvent event = (DeclarativeModuleEvent) actrEvent;

    String source = event.getSource().getName();
    long system = event.getSystemTime();
    double time = event.getSimulationTime();
    DeclarativeModuleEvent.Type type = event.getType();
    CommonTree payload = null;

    try
    {
      switch (type)
      {
        case CHUNK_CREATED:
        case CHUNK_ADDED:
          payload = ASTResolver.toAST(event.getChunk(), false);
          break;
        case CHUNK_TYPE_CREATED:
        case CHUNK_TYPE_ADDED:
          payload = ASTResolver.toAST(event.getChunkType(), false);
          break;
        default:
          if (LOGGER.isDebugEnabled())
            LOGGER.debug("No payload transform available for " + type);
      }

      return new TransformedDeclarativeModuleEvent(source, system, time, type,
          payload);
    }
    catch (Exception e)
    {
      LOGGER.debug("Could not transform event ", e);
    }
    return null;
  }

}