Examples of org.apache.uima.flow.Step

org.apache.uima.flow.Step
Represents the next destination or destinations to which a CAS should be routed. A Step is the output of the {@link Flow#next()} method. A Flow should output aninstance of a concrete class that extends Step. Currently, these are:
- {@link SimpleStep} - specifies a single AnalysisEngine to which the CAS should next berouted
- {@link ParallelStep} - specifies multiple AnalysisEngine to which the CAS should next berouted, where the relative order in which these Analysis Engines execute does not matter.
- {@link FinalStep} - indicates that there are no more destinations for this CAS.

    return endpoint;
  }


  private void executeFlowStep(FlowContainer aFlow, String aCasReferenceId, boolean newCAS)
          throws AsynchAEException {
    Step step = null;
    try {
      //  Guard a call to next(). Allow one thread and block the rest
      synchronized( flowControllerContainer ) {
        step = aFlow.next();
      }

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      if (currentStep >= mSequence.size()) {
        return new FinalStep(); // this CAS has finished the sequence
      }


      // if next step is a CasMultiplier, set wasPassedToCasMultiplier to true for next time
      Step nextStep = (Step) mSequence.get(currentStep++);
      if (stepContainsCasMultiplier(nextStep)) {
        wasPassedToCasMultiplier = true;
      }


      // now send the CAS to the next AE(s) in sequence.

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   */
  public void removeAnalysisEngines(Collection aKeys) throws AnalysisEngineProcessException {
    // Remove keys from Sequence
    int i = 0;
    while (i < mSequence.size()) {
      Step step = (Step) mSequence.get(i);
      if (step instanceof SimpleStep && aKeys.contains(((SimpleStep) step).getAnalysisEngineKey())) {
        mSequence.remove(i);
      } else if (step instanceof ParallelStep) {
        Collection keys = new ArrayList(((ParallelStep) step).getAnalysisEngineKeys());
        keys.removeAll(aKeys);

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      if (currentStep >= mSequence.size()) {
        return new FinalStep(); // this CAS has finished the sequence
      }


      // if next step is a CasMultiplier, set wasPassedToCasMultiplier to true for next time
      Step nextStep = (Step) mSequence.get(currentStep++);
      if (stepContainsCasMultiplier(nextStep))
        wasPassedToCasMultiplier = true;


      // now send the CAS to the next AE(s) in sequence.
      return nextStep;

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   * @see org.apache.uima.flow.FlowController_ImplBase#removeAnalysisEngines(java.util.Collection)
   */
  public void removeAnalysisEngines(Collection aKeys) throws AnalysisEngineProcessException {
    // Remove keys from Sequence
    for (int i = 0; i < mSequence.size(); ++i) {
      Step step = (Step) mSequence.get(i);
      if (step instanceof SimpleStep && aKeys.contains(((SimpleStep) step).getAnalysisEngineKey())) {
        mSequence.set(i, null);
      } else if (step instanceof ParallelStep) {
        Collection keys = new ArrayList(((ParallelStep) step).getAnalysisEngineKeys());
        keys.removeAll(aKeys);

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        wasPassedToCasMultiplier = false;
        casMultiplierProducedNewCas = false;
      }


      // Get next in sequence, skipping any disabled ones
      Step nextStep;
      do {
        if (currentStep >= mSequence.size()) {
          mLogger.log(Level.FINE, "CAS " + flowId + " at end of flow");
          return new FinalStep(); // this CAS has finished the sequence
        }

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      throw new AnalysisEngineProcessException();
    }
    // Remove keys from Sequence
    int i = 0;
    while (i < mSequence.size()) {
      Step step = (Step) mSequence.get(i);
      if (step instanceof SimpleStep && aKeys.contains(((SimpleStep) step).getAnalysisEngineKey())) {
        mSequence.remove(i);
      } else if (step instanceof ParallelStep) {
        Collection keys = new ArrayList(((ParallelStep) step).getAnalysisEngineKeys());
        keys.removeAll(aKeys);

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    return endpoint;
  }


  private void executeFlowStep(FlowContainer aFlow, String aCasReferenceId, boolean newCAS)
          throws AsynchAEException {
    Step step = null;
    try {
      //  Guard a call to next(). Allow one thread and block the rest
      synchronized( flowControllerContainer ) {
        step = aFlow.next();
      }

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      }
    }
  }
  private void executeFlowStep(FlowContainer aFlow, String aCasReferenceId, boolean newCAS) throws AsynchAEException
  {
    Step step = null;
    try
    {
      step = aFlow.next();
    }
    catch( Exception e)

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      throw new AnalysisEngineProcessException();
    }
    //Remove keys from Sequence
    int i = 0;
    while (i < mSequence.size()) {
      Step step = (Step)mSequence.get(i);
      if (step instanceof SimpleStep && aKeys.contains(((SimpleStep)step).getAnalysisEngineKey())) {
        mSequence.remove(i);
      }
      else if (step instanceof ParallelStep) {
        Collection keys = new ArrayList(((ParallelStep)step).getAnalysisEngineKeys());

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