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/* 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 org.activiti.engine.impl.bpmn.parser.handler;

import org.activiti.bpmn.constants.BpmnXMLConstants;
import org.activiti.bpmn.model.BaseElement;
import org.activiti.bpmn.model.BoundaryEvent;
import org.activiti.bpmn.model.BpmnModel;
import org.activiti.bpmn.model.CancelEventDefinition;
import org.activiti.bpmn.model.EventDefinition;
import org.activiti.bpmn.model.MessageEventDefinition;
import org.activiti.bpmn.model.SignalEventDefinition;
import org.activiti.bpmn.model.TimerEventDefinition;
import org.activiti.engine.impl.bpmn.parser.BpmnParse;
import org.activiti.engine.impl.pvm.process.ActivityImpl;


/**
 * @author Joram Barrez
 */
public class BoundaryEventParseHandler extends AbstractBpmnParseHandler {
  
  public Class< ? extends BaseElement> getHandledType() {
    return BoundaryEvent.class;
  }
  
  protected void executeParse(BpmnParse bpmnParse, BoundaryEvent boundaryEvent) {
    
    BpmnModel bpmnModel = bpmnParse.getBpmnModel();
    ActivityImpl parentActivity = findActivity(bpmnParse, boundaryEvent.getAttachedToRefId());
    if (parentActivity == null) {
      bpmnModel.addProblem("Invalid reference in boundary event. Make sure that the referenced activity is defined in the same scope as the boundary event",  boundaryEvent);
      return;
    }
   
    ActivityImpl nestedActivity = createActivityOnScope(bpmnParse, boundaryEvent, BpmnXMLConstants.ELEMENT_EVENT_BOUNDARY, parentActivity);
    bpmnParse.setCurrentActivity(nestedActivity);

    EventDefinition eventDefinition = null;
    if (boundaryEvent.getEventDefinitions().size() > 0) {
      eventDefinition = boundaryEvent.getEventDefinitions().get(0);
    }
    
    if (eventDefinition instanceof TimerEventDefinition
            || eventDefinition instanceof org.activiti.bpmn.model.ErrorEventDefinition
            || eventDefinition instanceof SignalEventDefinition
            || eventDefinition instanceof CancelEventDefinition
            || eventDefinition instanceof MessageEventDefinition
            || eventDefinition instanceof org.activiti.bpmn.model.CompensateEventDefinition) {

      bpmnParse.getBpmnParserHandlers().parseElement(bpmnParse, eventDefinition);
      
    } else {
      bpmnModel.addProblem("Unsupported boundary event type", boundaryEvent);
    }
  }

}