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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.model.*;
import org.activiti.engine.impl.bpmn.parser.BpmnParse;
import org.activiti.engine.impl.util.CollectionUtil;

/**


 */
public class StartEventParseHandler extends AbstractActivityBpmnParseHandler {

  @Override
  public Class getHandledType() {
    return StartEvent.class;
  }

  @Override
  protected void executeParse(BpmnParse bpmnParse, StartEvent element) {
    if (element.getSubProcess() != null && element.getSubProcess() instanceof EventSubProcess) {
      if (CollectionUtil.isNotEmpty(element.getEventDefinitions())) {
        EventDefinition eventDefinition = element.getEventDefinitions().get(0);
        if (eventDefinition instanceof MessageEventDefinition) {
          MessageEventDefinition messageDefinition = (MessageEventDefinition) eventDefinition;
          BpmnModel bpmnModel = bpmnParse.getBpmnModel();
          String messageRef = messageDefinition.getMessageRef();
          if (bpmnModel.containsMessageId(messageRef)) {
            Message message = bpmnModel.getMessage(messageRef);
            messageDefinition.setMessageRef(message.getName());
            messageDefinition.setExtensionElements(message.getExtensionElements());
          }
          element.setBehavior(bpmnParse.getActivityBehaviorFactory().createEventSubProcessMessageStartEventActivityBehavior(element, messageDefinition));
        
        } else if (eventDefinition instanceof ErrorEventDefinition) {
          element.setBehavior(bpmnParse.getActivityBehaviorFactory().createEventSubProcessErrorStartEventActivityBehavior(element));
        }
      }
      
    } else if (CollectionUtil.isEmpty(element.getEventDefinitions())) {
      element.setBehavior(bpmnParse.getActivityBehaviorFactory().createNoneStartEventActivityBehavior(element));
    }
    
    if (element.getSubProcess() == null && (CollectionUtil.isEmpty(element.getEventDefinitions()) || 
        bpmnParse.getCurrentProcess().getInitialFlowElement() == null)) {

      bpmnParse.getCurrentProcess().setInitialFlowElement(element);
    }
  }

}