/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.scxml2.env;
  
  import java.io.Serializable;
  
  import javax.xml.stream.Location;
  import javax.xml.stream.XMLReporter;
  import javax.xml.stream.XMLStreamException;
  
  import org.apache.commons.scxml2.ErrorReporter;
  import org.apache.commons.scxml2.SCXMLListener;
  import org.apache.commons.scxml2.model.EnterableState;
  import org.apache.commons.scxml2.model.Transition;
  import org.apache.commons.scxml2.model.TransitionTarget;
  import org.xml.sax.ErrorHandler;
  import org.xml.sax.SAXException;
  import org.xml.sax.SAXParseException;
  
  /**
   * A simple tracer connected to Apache Commons Logging.
   *
   */
  public class Tracer implements ErrorHandler, ErrorReporter,
                                 SCXMLListener, Serializable, XMLReporter {
  
      /** Serial version UID. */
      private static final long serialVersionUID = 1L;
      /** ErrorHandler delegate. */
      private ErrorHandler errHandler;
      /** ErrorReporter delegate. */
      private ErrorReporter errReporter;
      /** SCXMLListener delegate. */
      private SCXMLListener scxmlListener;
      /** XMLReporter delegate. */
      private XMLReporter xmlReporter;
  
      /**
       * Constructor.
       */
      public Tracer() {
          super();
          errHandler = new SimpleErrorHandler();
          errReporter = new SimpleErrorReporter();
          scxmlListener = new SimpleSCXMLListener();
          xmlReporter = new SimpleXMLReporter();
      }
  
      /**
       * @see org.xml.sax.ErrorHandler#warning(org.xml.sax.SAXParseException)
       */
      public void warning(final SAXParseException exception)
      throws SAXException {
          errHandler.warning(exception);
      }
  
      /**
       * @see org.xml.sax.ErrorHandler#error(org.xml.sax.SAXParseException)
       */
      public void error(final SAXParseException exception)
      throws SAXException {
          errHandler.error(exception);
      }
  
      /**
       * @see org.xml.sax.ErrorHandler#fatalError(org.xml.sax.SAXParseException)
       */
      public void fatalError(final SAXParseException exception)
      throws SAXException {
          errHandler.fatalError(exception);
      }
  
      /**
       * @see ErrorReporter#onError(String, String, Object)
       */
      public void onError(final String errCode, final String errDetail,
              final Object errCtx) {
          errReporter.onError(errCode, errDetail, errCtx);
      }
  
      /**
       * @see SCXMLListener#onEntry(EnterableState)
       */
      public void onEntry(final EnterableState state) {
          scxmlListener.onEntry(state);
     }
 
     /**
      * @see SCXMLListener#onExit(EnterableState)
      */
     public void onExit(final EnterableState state) {
         scxmlListener.onExit(state);
     }
 
     /**
      * @see SCXMLListener#onTransition(TransitionTarget,TransitionTarget,Transition,String)
      */
     public void onTransition(final TransitionTarget from,
             final TransitionTarget to, final Transition transition, final String event) {
         scxmlListener.onTransition(from, to, transition, event);
     }
 
     /**
      * @see XMLReporter#report(String, String, Object, Location)
      */
 	public void report(final String message, final String errorType, final Object relatedInformation,
 			final Location location)
 	throws XMLStreamException {
 		xmlReporter.report(message, errorType, relatedInformation, location);
 	}
 
 }