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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.BpmnModel;
import org.activiti.bpmn.model.EventGateway;
import org.activiti.bpmn.model.FlowElement;
import org.activiti.bpmn.model.IntermediateCatchEvent;
import org.activiti.bpmn.model.SequenceFlow;
import org.activiti.engine.impl.bpmn.parser.BpmnParse;
import org.activiti.engine.impl.pvm.process.ActivityImpl;


/**
 * @author Joram Barrez
 */
public class EventBasedGatewayParseHandler extends AbstractActivityBpmnParseHandler {
  
  public Class< ? extends BaseElement> getHandledType() {
    return EventGateway.class;
  }
  
  protected void executeParse(BpmnParse bpmnParse, EventGateway gateway) {
    ActivityImpl activity = createActivityOnCurrentScope(bpmnParse, gateway, BpmnXMLConstants.ELEMENT_GATEWAY_EVENT);   
    activity.setActivityBehavior(bpmnParse.getActivityBehaviorFactory().createEventBasedGatewayActivityBehavior(gateway));
    activity.setScope(true);

    // find all outgoing sequence flows
    BpmnModel bpmnModel = bpmnParse.getBpmnModel();
    for (SequenceFlow sequenceFlow : gateway.getOutgoingFlows()) {
      FlowElement flowElement = bpmnModel.getFlowElement(sequenceFlow.getTargetRef());
      if (flowElement != null && flowElement instanceof IntermediateCatchEvent == false) {
        bpmnModel.addProblem("Event based gateway can only be connected to elements of type intermediateCatchEvent.", flowElement);
      }
    }
  }

}