Java Code Examples for org.activiti.engine.impl.Condition#evaluate()

public static boolean hasTrueCondition(SequenceFlow sequenceFlow, DelegateExecution execution) {
  String conditionExpression = null;
  if (Context.getProcessEngineConfiguration().isEnableProcessDefinitionInfoCache()) {
    ObjectNode elementProperties = Context.getBpmnOverrideElementProperties(sequenceFlow.getId(), execution.getProcessDefinitionId());
    conditionExpression = getActiveValue(sequenceFlow.getConditionExpression(), DynamicBpmnConstants.SEQUENCE_FLOW_CONDITION, elementProperties);
  } else {
    conditionExpression = sequenceFlow.getConditionExpression();
  }
  
  if (StringUtils.isNotEmpty(conditionExpression)) {

    Expression expression = Context.getProcessEngineConfiguration().getExpressionManager().createExpression(conditionExpression);
    Condition condition = new UelExpressionCondition(expression);
    if (condition.evaluate(sequenceFlow.getId(), execution)) {
      return true;
    }

    return false;

  } else {
    return true;
  }

}
 

protected void handleAdhocSubProcess(FlowNode flowNode) {
  boolean completeAdhocSubProcess = false;
  AdhocSubProcess adhocSubProcess = (AdhocSubProcess) flowNode.getParentContainer();
  if (adhocSubProcess.getCompletionCondition() != null) {
    Expression expression = Context.getProcessEngineConfiguration().getExpressionManager().createExpression(adhocSubProcess.getCompletionCondition());
    Condition condition = new UelExpressionCondition(expression);
    if (condition.evaluate(adhocSubProcess.getId(), execution)) {
      completeAdhocSubProcess = true;
    }
  }

  if (flowNode.getOutgoingFlows().size() > 0) {
    leaveFlowNode(flowNode);
  } else {
    commandContext.getExecutionEntityManager().deleteExecutionAndRelatedData(execution, null, false);
  }

  if (completeAdhocSubProcess) {
    boolean endAdhocSubProcess = true;
    if (adhocSubProcess.isCancelRemainingInstances() == false) {
      List<ExecutionEntity> childExecutions = commandContext.getExecutionEntityManager().findChildExecutionsByParentExecutionId(execution.getParentId());
      for (ExecutionEntity executionEntity : childExecutions) {
        if (executionEntity.getId().equals(execution.getId()) == false) {
          endAdhocSubProcess = false;
          break;
        }
      }
    }

    if (endAdhocSubProcess) {
      Context.getAgenda().planEndExecutionOperation(execution.getParent());
    }
  }
}
 

@Override
public void execute(DelegateExecution execution) {
    ActivityExecution activityExecution = (ActivityExecution) execution;
    activityExecution.inactivate();
    lockConcurrentRoot(activityExecution);

    PvmActivity activity = activityExecution.getActivity();
    if (!activeConcurrentExecutionsExist(activityExecution)) {

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("inclusive gateway '{}' activates", activity.getId());
        }

        List<ActivityExecution> joinedExecutions = activityExecution.findInactiveConcurrentExecutions(activity);
        String defaultSequenceFlow = (String) activityExecution.getActivity().getProperty("default");
        List<PvmTransition> transitionsToTake = new ArrayList<>();

        for (PvmTransition outgoingTransition : activityExecution.getActivity().getOutgoingTransitions()) {

            Expression skipExpression = outgoingTransition.getSkipExpression();
            if (!SkipExpressionUtil.isSkipExpressionEnabled(activityExecution, skipExpression)) {
                if (defaultSequenceFlow == null || !outgoingTransition.getId().equals(defaultSequenceFlow)) {
                    Condition condition = (Condition) outgoingTransition.getProperty(BpmnParse.PROPERTYNAME_CONDITION);
                    if (condition == null || condition.evaluate(outgoingTransition.getId(), execution)) {
                        transitionsToTake.add(outgoingTransition);
                    }
                }
            } else if (SkipExpressionUtil.shouldSkipFlowElement(activityExecution, skipExpression)) {
                transitionsToTake.add(outgoingTransition);
            }
        }

        if (!transitionsToTake.isEmpty()) {
            activityExecution.takeAll(transitionsToTake, joinedExecutions);

        } else {

            if (defaultSequenceFlow != null) {
                PvmTransition defaultTransition = activityExecution.getActivity().findOutgoingTransition(defaultSequenceFlow);
                if (defaultTransition != null) {
                    activityExecution.take(defaultTransition);
                } else {
                    throw new ActivitiException("Default sequence flow '"
                            + defaultSequenceFlow + "' could not be not found");
                }
            } else {
                // No sequence flow could be found, not even a default one
                throw new ActivitiException(
                        "No outgoing sequence flow of the inclusive gateway '"
                                + activityExecution.getActivity().getId()
                                + "' could be selected for continuing the process");
            }
        }

    } else {
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("Inclusive gateway '{}' does not activate", activity.getId());
        }
    }
}
 

/**
 * 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 overridden 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).
 */
@Override
protected void leave(ActivityExecution execution) {

    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("Leaving activity '{}'", execution.getActivity().getId());
    }

    PvmTransition outgoingSeqFlow = null;
    String defaultSequenceFlow = (String) execution.getActivity().getProperty("default");
    Iterator<PvmTransition> transitionIterator = execution.getActivity().getOutgoingTransitions().iterator();
    while (outgoingSeqFlow == null && transitionIterator.hasNext()) {
        PvmTransition seqFlow = transitionIterator.next();
        Expression skipExpression = seqFlow.getSkipExpression();

        if (!SkipExpressionUtil.isSkipExpressionEnabled(execution, skipExpression)) {
            Condition condition = (Condition) seqFlow.getProperty(BpmnParse.PROPERTYNAME_CONDITION);
            if ((condition == null && (defaultSequenceFlow == null || !defaultSequenceFlow.equals(seqFlow.getId())))
                    || (condition != null && condition.evaluate(seqFlow.getId(), execution))) {
                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Sequence flow '{}' selected as outgoing sequence flow.", seqFlow.getId());
                }
                outgoingSeqFlow = seqFlow;
            }
        } else if (SkipExpressionUtil.shouldSkipFlowElement(execution, skipExpression)) {
            outgoingSeqFlow = seqFlow;
        }
    }

    if (outgoingSeqFlow != null) {
        execution.take(outgoingSeqFlow);
    } else {

        if (defaultSequenceFlow != null) {
            PvmTransition defaultTransition = execution.getActivity().findOutgoingTransition(defaultSequenceFlow);
            if (defaultTransition != null) {
                execution.take(defaultTransition);
            } else {
                throw new ActivitiException("Default sequence flow '" + defaultSequenceFlow + "' not found");
            }
        } else {
            // No sequence flow could be found, not even a default one
            throw new ActivitiException("No outgoing sequence flow of the exclusive gateway '"
                    + execution.getActivity().getId() + "' could be selected for continuing the process");
        }
    }
}
 

/**
 * Actual implementation of leaving an activity.
 *
 * @param execution                      The current execution context
 * @param checkConditions                Whether or not to check conditions before determining whether or not to take a transition.
 * @param throwExceptionIfExecutionStuck If true, an {@link ActivitiException} will be thrown in case no transition could be found to leave the activity.
 */
protected void performOutgoingBehavior(ActivityExecution execution,
                                       boolean checkConditions, boolean throwExceptionIfExecutionStuck, List<ActivityExecution> reusableExecutions) {

    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("Leaving activity '{}'", execution.getActivity().getId());
    }

    String defaultSequenceFlow = (String) execution.getActivity().getProperty("default");
    List<PvmTransition> transitionsToTake = new ArrayList<>();

    List<PvmTransition> outgoingTransitions = execution.getActivity().getOutgoingTransitions();
    for (PvmTransition outgoingTransition : outgoingTransitions) {
        Expression skipExpression = outgoingTransition.getSkipExpression();

        if (!SkipExpressionUtil.isSkipExpressionEnabled(execution, skipExpression)) {
            if (defaultSequenceFlow == null || !outgoingTransition.getId().equals(defaultSequenceFlow)) {
                Condition condition = (Condition) outgoingTransition.getProperty(BpmnParse.PROPERTYNAME_CONDITION);
                if (condition == null || !checkConditions || condition.evaluate(outgoingTransition.getId(), execution)) {
                    transitionsToTake.add(outgoingTransition);
                }
            }

        } else if (SkipExpressionUtil.shouldSkipFlowElement(execution, skipExpression)) {
            transitionsToTake.add(outgoingTransition);
        }
    }

    if (transitionsToTake.size() == 1) {

        execution.take(transitionsToTake.get(0));

    } else if (transitionsToTake.size() >= 1) {

        execution.inactivate();
        if (reusableExecutions == null || reusableExecutions.isEmpty()) {
            execution.takeAll(transitionsToTake, Collections.singletonList(execution));
        } else {
            execution.takeAll(transitionsToTake, reusableExecutions);
        }

    } else {

        if (defaultSequenceFlow != null) {
            PvmTransition defaultTransition = execution.getActivity().findOutgoingTransition(defaultSequenceFlow);
            if (defaultTransition != null) {
                execution.take(defaultTransition);
            } else {
                throw new ActivitiException("Default sequence flow '" + defaultSequenceFlow + "' could not be not found");
            }
        } else {

            Object isForCompensation = execution.getActivity().getProperty(BpmnParse.PROPERTYNAME_IS_FOR_COMPENSATION);
            if (isForCompensation != null && (Boolean) isForCompensation) {
                if (execution instanceof ExecutionEntity) {
                    Context.getCommandContext().getHistoryManager().recordActivityEnd((ExecutionEntity) execution);
                }
                InterpretableExecution parentExecution = (InterpretableExecution) execution.getParent();
                ((InterpretableExecution) execution).remove();
                parentExecution.signal("compensationDone", null);

            } else {

                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("No outgoing sequence flow found for {}. Ending execution.", execution.getActivity().getId());
                }
                execution.end();

                if (throwExceptionIfExecutionStuck) {
                    throw new ActivitiException("No outgoing sequence flow of the inclusive gateway '" + execution.getActivity().getId()
                            + "' could be selected for continuing the process");
                }
            }

        }
    }
}