org.apache.uima.analysis_engine.impl

## Class EmptyCasIterator

- java.lang.Object
- - org.apache.uima.analysis_engine.impl.EmptyCasIterator

- All Implemented Interfaces:
    CasIterator

      public class EmptyCasIterator
      extends Object
      implements CasIterator

  Trivial CasIterator that returns no CASes.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `EmptyCasIterator()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `hasNext()` Checks if there are more CASes to be returned by the iterator.
    `CAS` | `next()` Gets the next CAS from the iterator.
    `void` | `release()` Releases any CASes owned by this CasIterator.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### EmptyCasIterator

          public EmptyCasIterator()

  - ### Method Detail

    - #### hasNext

          public boolean hasNext()
                          throws AnalysisEngineProcessException

      Description copied from interface: `CasIterator`
      Checks if there are more CASes to be returned by the iterator.
      Specified by:
        `hasNext` in interface `CasIterator`
      Returns:
        true if there are more CASes to be returned, false if not
      Throws:
        `AnalysisEngineProcessException` - if a failure has occurred during processing. If an exception is thrown, this indicates that processing has aborted, so no further calls to the CasIterator should be made.

    - #### next

          public CAS next()
                   throws AnalysisEngineProcessException

      Description copied from interface: `CasIterator`
      Gets the next CAS from the iterator.
      Specified by:
        `next` in interface `CasIterator`
      Returns:
        the next CAS.
      Throws:
        `AnalysisEngineProcessException` - if a failure has occurred during processing. If an exception is thrown, this indicates that processing has aborted, so no further calls to the CasIterator should be made.

    - #### release

          public void release()

      Description copied from interface: `CasIterator`
      Releases any CASes owned by this CasIterator. You only need to Call this method if you stop using a CasIterator before you have iterated all the way through.
      Specified by:
        `release` in interface `CasIterator`

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