Package org.apache.uima.analysis_engine.impl.compatibility

Class CollectionReaderAdapter

java.lang.Object
org.apache.uima.analysis_engine.impl.compatibility.CollectionReaderAdapter
All Implemented Interfaces:
AnalysisComponent
public class CollectionReaderAdapter extends Object implements AnalysisComponent
Adapter that allows CollectionReaders to implement the AnalysisComponent interface.

  • Constructor Details

    • CollectionReaderAdapter

      public CollectionReaderAdapter(CollectionReader aCollectionReader, AnalysisEngineMetaData aMetaData)
      Create a new annotator adapter.
      Parameters:
      aCollectionReader - the CollectionReader instance
      aMetaData - metadata for the annotator. Needed to compute ResultSpecification.

  • Method Details

    • initialize

      public void initialize(UimaContext aContext) throws ResourceInitializationException
      Description copied from interface: AnalysisComponent
      Performs any startup tasks required by this component. The framework calls this method only once, just after the AnalysisComponent has been instantiated.

      The framework supplies this AnalysisComponent with a reference to the UimaContext that it will use, for example to access configuration settings or resources. This AnalysisComponent should store a reference to its the UimaContext for later use.

      Specified by:
      initialize in interface AnalysisComponent
      Parameters:
      aContext - Provides access to services and resources managed by the framework. This includes configuration parameters, logging, and access to external resources.
      Throws:
      ResourceInitializationException - if this AnalysisComponent cannot initialize successfully.

    • checkTypeSystemChange

      public void checkTypeSystemChange(AbstractCas aCAS) throws AnalysisEngineProcessException
      Throws:
      AnalysisEngineProcessException

    • process

      public void process(AbstractCas aCAS) throws AnalysisEngineProcessException
      Description copied from interface: AnalysisComponent
      Inputs a CAS to the AnalysisComponent. The AnalysisComponent "owns" this CAS until such time as AnalysisComponent.hasNext() is called and returns false or until process is called again (see class description).
      Specified by:
      process in interface AnalysisComponent
      Parameters:
      aCAS - A CAS that this AnalysisComponent should process. The framework will ensure that aCAS implements the specific CAS interface specified by the AnalysisComponent.getRequiredCasInterface() method.
      Throws:
      AnalysisEngineProcessException - if a problem occurs during processing

    • batchProcessComplete

      public void batchProcessComplete() throws AnalysisEngineProcessException
      Description copied from interface: AnalysisComponent
      Completes the processing of a batch of CASes. The size of a batch is determined based on configuration provided by the application that is using this component. The purpose of batchProcessComplete is to give this AnalysisComponent the change to flush information from memory to persistent storage. In the event of an error, this allows the processing to be restarted from the end of the last completed batch.

      If this component's descriptor declares that it is recoverable, then this component is required to be restartable from the end of the last completed batch.

      Specified by:
      batchProcessComplete in interface AnalysisComponent
      Throws:
      AnalysisEngineProcessException - if this component encounters a problem in flushing its state to persistent storage

    • collectionProcessComplete

      public void collectionProcessComplete() throws AnalysisEngineProcessException
      Description copied from interface: AnalysisComponent
      Notifies this AnalysisComponent that processing of an entire collection has been completed. In this method, this component should finish writing any output relating to the current collection.
      Specified by:
      collectionProcessComplete in interface AnalysisComponent
      Throws:
      AnalysisEngineProcessException - if this component encounters a problem in its end-of-collection processing

    • destroy

      public void destroy()
      Description copied from interface: AnalysisComponent
      Frees all resources held by this AnalysisComponent. The framework calls this method only once, when it is finished using this component.
      Specified by:
      destroy in interface AnalysisComponent

    • reconfigure

      public void reconfigure() throws ResourceInitializationException, ResourceConfigurationException
      Description copied from interface: AnalysisComponent
      Alerts this AnalysisComponent that the values of its configuration parameters or external resources have changed. This AnalysisComponent should re-read its configuration from the UimaContext and take appropriate action to reconfigure itself.

      In the abstract base classes provided by the framework, this is generally implemented by calling destroy followed by initialize and typeSystemChanged. If a more efficient implementation is needed, you can override that implementation.

      Specified by:
      reconfigure in interface AnalysisComponent
      Throws:
      ResourceInitializationException - if this component fails to reinitialize itself based on the new configuration.
      ResourceConfigurationException - if the configuration specified for this component is invalid.

    • hasNext

      public boolean hasNext() throws AnalysisEngineProcessException
      Description copied from interface: AnalysisComponent
      Asks if this AnalysisComponent has another CAS to output. If this method returns true, then a call to AnalysisComponent.next() should retrieve the next output CAS. When this method returns false, the AnalysisComponent gives up control of the initial CAS that was passed to its AnalysisComponent.process(AbstractCas) method.
      Specified by:
      hasNext in interface AnalysisComponent
      Returns:
      true if this AnalysisComponent has another CAS to output, false if not.
      Throws:
      AnalysisEngineProcessException - if a problem occurs during processing

    • next

      public AbstractCas next() throws AnalysisEngineProcessException
      Description copied from interface: AnalysisComponent
      Gets the next output CAS. The framework will only call this method after first calling AnalysisComponent.hasNext() and checking that it returns true.

      The AnalysisComponent can obtain a new CAS by calling UimaContext.getEmptyCas(Class) (or instead, one of the helper methods in the ImplBase class that it extended).

      Specified by:
      next in interface AnalysisComponent
      Returns:
      the next output CAS.
      Throws:
      AnalysisEngineProcessException - if a problem occurs during processing

    • next

      public void next(AbstractCas aEmptyCas) throws AnalysisEngineProcessException
      Throws:
      AnalysisEngineProcessException

    • getRequiredCasInterface

      public Class<? extends AbstractCas> getRequiredCasInterface()
      Get the CAS interface required by this annotator.
      Specified by:
      getRequiredCasInterface in interface AnalysisComponent
      Returns:
      the CAS interface required by this annotator

    • getCasInstancesRequired

      public int getCasInstancesRequired()
      Description copied from interface: AnalysisComponent
      Returns the maximum number of CAS instances that this AnalysisComponent expects to use at the same time. This only applies to CasMultipliers. Most CasMultipliers will only need one CAS at a time. Only if there is a clear need should this be overridden to return something greater than 1.
      Specified by:
      getCasInstancesRequired in interface AnalysisComponent
      Returns:
      the number of CAS instances required by this AnalysisComponent.

    • setResultSpecification

      public void setResultSpecification(ResultSpecification aResultSpec)
      Description copied from interface: AnalysisComponent
      Sets the ResultSpecification that this AnalysisComponent should use. The ResultSpecification is a set of types and features that this AnalysisComponent is asked to produce. An Analysis Component may (but is not required to) optimize its processing by omitting the generation of any types or features that are not part of the ResultSpecification.
      Specified by:
      setResultSpecification in interface AnalysisComponent
      Parameters:
      aResultSpec - the ResultSpecification for this Analysis Component to use.