Package org.apache.uima.flow

Class CasFlow_ImplBase

java.lang.Object
org.apache.uima.flow.CasFlow_ImplBase
All Implemented Interfaces:
Flow
Direct Known Subclasses:
CapabilityLanguageFlowObject
public abstract class CasFlow_ImplBase extends Object implements Flow
Convenience base class for Flow objects that use the CAS interface. Stores the CAS in a field made accessible through the protected getCas() method.

  • Constructor Details

    • CasFlow_ImplBase

      public CasFlow_ImplBase()

  • Method Details

    • setCas

      @Deprecated public void setCas(CAS aCAS)
      Deprecated.
      this is automatically done by the framework after a new flow object is created
      Sets the CAS to be routed by this Flow object. This should be called from the FlowController.computeFlow(AbstractCas) method after this Flow object is instantiated.
      Parameters:
      aCAS - the CAS to be routed by this Flow object

    • newCasProduced

      public final Flow newCasProduced(AbstractCas newCas, String producedBy) throws AnalysisEngineProcessException
      Overriden to check that newCas is an instanceof CAS. If it is, then newCasProduced(CAS,String) is called. If not, an exception is thrown.
      Specified by:
      newCasProduced in interface Flow
      Parameters:
      newCas - the new CAS
      producedBy - key of the AnalysisEngine (CAS Multiplier) that produced the new CAS
      Returns:
      a new Flow object that has responsibility for routing aCAS through the Aggregate Analysis Engine.
      Throws:
      AnalysisEngineProcessException - passthru
      See Also:

    • continueOnFailure

      public boolean continueOnFailure(String failedAeKey, Exception failure)
      By default, returns false, indicating that processing cannot continue after a failure. May be overridden by subclasses to allow processing to continue.
      Specified by:
      continueOnFailure in interface Flow
      Parameters:
      failedAeKey - The key of the analysis engine that failed.
      failure - the Exception that occurred
      Returns:
      true if the FlowController decides that processing of the CAS can continue; false if processing of the CAS should be aborted.
      See Also:

    • aborted

      public void aborted()
      By default, does nothing. May be overriden by subclasses to release resources when a flow is aborted.
      Specified by:
      aborted in interface Flow
      See Also:

    • newCasProduced

      protected Flow newCasProduced(CAS newCas, String producedBy) throws AnalysisEngineProcessException
      By default, throws an exception to indicate this this Flow object does not support new CASes being produced in the middle of the flow. Subclasses can override to implement handling for this.
      Parameters:
      newCas - the new CAS
      producedBy - the key of the CAS Multiplier that produced this CAS
      Returns:
      a Flow object that will be used to route the new CAS
      Throws:
      AnalysisEngineProcessException - passthru
      See Also:

    • getCas

      protected CAS getCas()
      Gets the CAS being routed by this Flow object.
      Returns:
      the CAS being routed by this Flow object