/*
    * Copyright 2003 - 2013 The eFaps Team
    *
    * 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.
   *
   * Revision:        $Rev$
   * Last Changed:    $Date$
   * Last Changed By: $Author$
   */
  
  package org.efaps.bpm.workitem;
  
  import org.kie.api.runtime.process.WorkItem;
  import org.kie.api.runtime.process.WorkItemHandler;
  import org.kie.api.runtime.process.WorkItemManager;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * TODO comment!
   *
   * @author The eFaps Team
   * @version $Id$
   */
  public class SignallingHandlerWrapper
      extends AbstractExceptionWorkItemHandler
  {
      /**
       * Logging instance used in this class.
       */
      private static final Logger LOG = LoggerFactory.getLogger(SignallingHandlerWrapper.class);
  
      /**
       * Event type key.
       */
      private String eventType;
  
      /**
       * Key to the exception returned to the Process.
       */
      private String workItemExceptionParameterName = "org.efaps.bpm.workitem.exception";
  
      /**
       * @param _originalTaskHandler  task handler that will be wrapped in
       */
      public SignallingHandlerWrapper(final WorkItemHandler _originalTaskHandler)
      {
          super(_originalTaskHandler);
          this.eventType = null;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void handleExecuteException(final Throwable _cause,
                                         final WorkItem _workItem,
                                         final WorkItemManager _manager)
      {
          _workItem.getParameters().put(this.workItemExceptionParameterName, _cause);
          final String eventTypeTmp = getEventType(_cause, _workItem);
          SignallingHandlerWrapper.LOG.debug("Signaling event with eventType: {}", eventTypeTmp);
          ((org.drools.core.process.instance.WorkItemManager) _manager).signalEvent(eventTypeTmp, _workItem,
                          _workItem.getProcessInstanceId());
      }
  
      /**
       * @param _cause    cause the ventype is wanted for
       * @param _workItem workitem the couse belongs to
       * @return eventype
       */
      public String getEventType(final Throwable _cause,
                                 final WorkItem _workItem)
      {
          // check if manually set
          if (this.eventType == null) {
              final Object signal = _workItem.getParameter(EsjpWorkItemHandler.PARAMETERNAME_ERRORSIGNAL);
              if (signal != null) {
                  this.eventType = "Error-" + signal;
              }
              if (_cause instanceof WorkItemException) {
                  this.eventType = this.eventType + "-" + _cause.getMessage();
              }
          }
          return this.eventType;
      }
  
      /**
       * {@inheritDoc}
      */
     @Override
     public void handleAbortException(final Throwable _cause,
                                      final WorkItem _workItem,
                                      final WorkItemManager _manager)
     {
         _workItem.getParameters().put(this.workItemExceptionParameterName, _cause);
         final String eventTypeTmp = getEventType(_cause, _workItem);
         SignallingHandlerWrapper.LOG.debug("Signaling event with eventType: {}", eventTypeTmp);
         ((org.drools.core.process.instance.WorkItemManager) _manager).signalEvent(eventTypeTmp, _workItem,
                         _workItem.getProcessInstanceId());
     }
 
     /**
      * Getter method for the instance variable {@link #eventType}.
      *
      * @return value of instance variable {@link #eventType}
      */
     public String getEventType()
     {
         return this.eventType;
     }
 
     /**
      * Setter method for instance variable {@link #eventType}.
      *
      * @param _eventType value for instance variable {@link #eventType}
      */
     public void setEventType(final String _eventType)
     {
         this.eventType = _eventType;
     }
 
     /**
      * Getter method for the instance variable {@link #workItemExceptionParameterName}.
      *
      * @return value of instance variable {@link #workItemExceptionParameterName}
      */
     public String getWorkItemExceptionParameterName()
     {
         return this.workItemExceptionParameterName;
     }
 
     /**
      * Setter method for instance variable {@link #workItemExceptionParameterName}.
      *
      * @param _workItemExceptionParameterName value for instance variable {@link #workItemExceptionParameterName}
      */
     public void setWorkItemExceptionParameterName(final String _workItemExceptionParameterName)
     {
         this.workItemExceptionParameterName = _workItemExceptionParameterName;
     }
 }