/*
 * Copyright 2005-2007 the original author or authors.
 *
 * Licensed 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 net.sf.dozer.util.mapping.event;

import java.util.Iterator;
import java.util.List;

import net.sf.dozer.util.mapping.MappingException;
import net.sf.dozer.util.mapping.util.MapperConstants;

/**
 * @author garsombke.franz
 * @author tierney.matt
*/
public class DozerEventManager implements EventManagerIF {
  private final List eventListeners;
  
  public DozerEventManager(List eventListeners) {
    this.eventListeners = eventListeners;
  }
  
  public void fireEvent(DozerEvent event) {
    //If no listeners were specified, then just return.
    if (eventListeners == null) {
      return;
    }
    String eventType = event.getType();
    Iterator iter = eventListeners.iterator();
    while (iter.hasNext()) {
      DozerEventListener listener = (DozerEventListener) iter.next();
      if(eventType.equals(MapperConstants.MAPPING_STARTED_EVENT)) {
        listener.mappingStarted(event);
      } else if (eventType.equals(MapperConstants.MAPPING_PRE_WRITING_DEST_VALUE)) {
        listener.preWritingDestinationValue(event);
      } else if (eventType.equals(MapperConstants.MAPPING_POST_WRITING_DEST_VALUE)) {
        listener.postWritingDestinationValue(event);
      } else if (eventType.equals(MapperConstants.MAPPING_FINISHED_EVENT)) {
        listener.mappingFinished(event);
      } else {
        throw new MappingException("Unsupported event type: " + eventType);
      }
    }
  }
  
}