org.camunda.bpm.engine.impl.bpmn.behavior
Class ExclusiveGatewayActivityBehavior

java.lang.Object
  org.camunda.bpm.engine.impl.bpmn.behavior.FlowNodeActivityBehavior
      org.camunda.bpm.engine.impl.bpmn.behavior.GatewayActivityBehavior
          org.camunda.bpm.engine.impl.bpmn.behavior.ExclusiveGatewayActivityBehavior

All Implemented Interfaces:

CoreActivityBehavior<ActivityExecution>, ActivityBehavior, SignallableActivityBehavior

public class ExclusiveGatewayActivityBehavior
extends GatewayActivityBehavior

implementation of the Exclusive Gateway/XOR gateway/exclusive data-based gateway as defined in the BPMN specification.

Author:

Joram Barrez

Field Summary

Fields inherited from class org.camunda.bpm.engine.impl.bpmn.behavior.FlowNodeActivityBehavior

bpmnActivityBehavior

Constructor Summary

ExclusiveGatewayActivityBehavior()

Method Summary

protected void

leave(ActivityExecution execution) The default behaviour of BPMN, taking every outgoing sequence flow (where the condition evaluates to true), is not valid for an exclusive gateway.

Methods inherited from class org.camunda.bpm.engine.impl.bpmn.behavior.GatewayActivityBehavior

lockConcurrentRoot

Methods inherited from class org.camunda.bpm.engine.impl.bpmn.behavior.FlowNodeActivityBehavior

execute, leaveIgnoreConditions, signal

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExclusiveGatewayActivityBehavior

public ExclusiveGatewayActivityBehavior()

Method Detail

leave

protected void leave(ActivityExecution execution)

The default behaviour of BPMN, taking every outgoing sequence flow (where the condition evaluates to true), is not valid for an exclusive gateway. Hence, this behaviour is overriden and replaced by the correct behavior: selecting the first sequence flow which condition evaluates to true (or which hasn't got a condition) and leaving the activity through that sequence flow. If no sequence flow is selected (ie all conditions evaluate to false), then the default sequence flow is taken (if defined).

Overrides:

leave in class FlowNodeActivityBehavior