/// <summary>
/// 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).
/// </summary>
public override void doLeave(ActivityExecution execution)
{
LOG.leavingActivity(execution.Activity.Id);
PvmTransition outgoingSeqFlow = null;
string defaultSequenceFlow = (string)execution.Activity.getProperty("default");
IEnumerator <PvmTransition> transitionIterator = execution.Activity.OutgoingTransitions.GetEnumerator();
while (outgoingSeqFlow == null && transitionIterator.MoveNext())
{
PvmTransition seqFlow = transitionIterator.Current;
Condition condition = (Condition)seqFlow.getProperty(BpmnParse.PROPERTYNAME_CONDITION);
if ((condition == null && (string.ReferenceEquals(defaultSequenceFlow, null) || !defaultSequenceFlow.Equals(seqFlow.Id))) || (condition != null && condition.evaluate(execution)))
{
LOG.outgoingSequenceFlowSelected(seqFlow.Id);
outgoingSeqFlow = seqFlow;
}
}
if (outgoingSeqFlow != null)
{
execution.leaveActivityViaTransition(outgoingSeqFlow);
}
else
{
if (!string.ReferenceEquals(defaultSequenceFlow, null))
{
PvmTransition defaultTransition = execution.Activity.findOutgoingTransition(defaultSequenceFlow);
if (defaultTransition != null)
{
execution.leaveActivityViaTransition(defaultTransition);
}
else
{
throw LOG.missingDefaultFlowException(execution.Activity.Id, defaultSequenceFlow);
}
}
else
{
//No sequence flow could be found, not even a default one
throw LOG.stuckExecutionException(execution.Activity.Id);
}
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public void execute(org.camunda.bpm.engine.impl.pvm.delegate.ActivityExecution execution) throws Exception
public virtual void execute(ActivityExecution execution)
{
IList <PvmTransition> outgoingTransitions = execution.Activity.OutgoingTransitions;
if (outgoingTransitions.Count == 0)
{
execution.end(true);
}
else
{
execution.leaveActivityViaTransition(outgoingTransitions[0]);
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public void execute(org.camunda.bpm.engine.impl.pvm.delegate.ActivityExecution execution) throws Exception
public virtual void execute(ActivityExecution execution)
{
string var = (string)execution.getVariable("var");
PvmTransition transition = null;
try
{
executeLogic(var);
transition = execution.Activity.findOutgoingTransition("no-exception");
}
catch (Exception)
{
transition = execution.Activity.findOutgoingTransition("exception");
}
execution.leaveActivityViaTransition(transition);
}
/// <summary>
/// Actual implementation of leaving an activity.
/// </summary>
/// <param name="execution">
/// The current execution context </param>
/// <param name="checkConditions">
/// Whether or not to check conditions before determining whether or
/// not to take a transition. </param>
protected internal virtual void performOutgoingBehavior(ActivityExecution execution, bool checkConditions, IList <ActivityExecution> reusableExecutions)
{
LOG.leavingActivity(execution.Activity.Id);
string defaultSequenceFlow = (string)execution.Activity.getProperty("default");
IList <PvmTransition> transitionsToTake = new List <PvmTransition>();
IList <PvmTransition> outgoingTransitions = execution.Activity.OutgoingTransitions;
foreach (PvmTransition outgoingTransition in outgoingTransitions)
{
if (string.ReferenceEquals(defaultSequenceFlow, null) || !outgoingTransition.Id.Equals(defaultSequenceFlow))
{
Condition condition = (Condition)outgoingTransition.getProperty(BpmnParse.PROPERTYNAME_CONDITION);
if (condition == null || !checkConditions || condition.evaluate(execution))
{
transitionsToTake.Add(outgoingTransition);
}
}
}
if (transitionsToTake.Count == 1)
{
execution.leaveActivityViaTransition(transitionsToTake[0]);
}
else if (transitionsToTake.Count >= 1)
{
if (reusableExecutions == null || reusableExecutions.Count == 0)
{
execution.leaveActivityViaTransitions(transitionsToTake, Arrays.asList(execution));
}
else
{
execution.leaveActivityViaTransitions(transitionsToTake, reusableExecutions);
}
}
else
{
if (!string.ReferenceEquals(defaultSequenceFlow, null))
{
PvmTransition defaultTransition = execution.Activity.findOutgoingTransition(defaultSequenceFlow);
if (defaultTransition != null)
{
execution.leaveActivityViaTransition(defaultTransition);
}
else
{
throw LOG.missingDefaultFlowException(execution.Activity.Id, defaultSequenceFlow);
}
}
else if (outgoingTransitions.Count > 0)
{
throw LOG.missingConditionalFlowException(execution.Activity.Id);
}
else
{
if (((ActivityImpl)execution.Activity).CompensationHandler && isAncestorCompensationThrowing(execution))
{
execution.endCompensation();
}
else
{
LOG.missingOutgoingSequenceFlow(execution.Activity.Id);
execution.end(true);
}
}
}
}