Chunker (Apache OpenNLP UIMA Annotators 1.9.5 API)
Date: 2026-06-18

opennlp.uima.chunker

## Class Chunker

- java.lang.Object
- - org.apache.uima.analysis_component.AnalysisComponent_ImplBase
  - - org.apache.uima.analysis_component.Annotator_ImplBase
    - - org.apache.uima.analysis_component.CasAnnotator_ImplBase
      - - opennlp.uima.chunker.Chunker

- All Implemented Interfaces:
    org.apache.uima.analysis_component.AnalysisComponent

      public final class Chunker
      extends org.apache.uima.analysis_component.CasAnnotator_ImplBase

  OpenNLP Chunker annotator.

  Mandatory parameters

  Type | Name | Description
  --- | --- | ---
  String | opennlp.uima.ModelName | The name of the model file
  String | opennlp.uima.SentenceType | The full name of the sentence type
  String | opennlp.uima.TokenType | The full name of the token type
  String | opennlp.uima.POSFeature
  String | opennlp.uima.ChunkType
  String | opennlp.uima.ChunkTagFeature

  Optional parameters

  Type | Name | Description
  --- | --- | ---
  Integer | opennlp.uima.BeamSize

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `CHUNK_TAG_FEATURE_PARAMETER` The chunk tag feature parameter
    `static String` | `CHUNK_TYPE_PARAMETER` The chunk type parameter.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `Chunker()` Initializes a new instance.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `destroy()` Releases allocated resources.
    `void` | `initialize(org.apache.uima.UimaContext context)` Initializes the current instance with the given context.
    `void` | `process(org.apache.uima.cas.CAS tcas)` Performs chunking on the given tcas object.
    `void` | `typeSystemInit(org.apache.uima.cas.TypeSystem typeSystem)` Initializes the type system.

    - ### Methods inherited from class org.apache.uima.analysis_component.CasAnnotator_ImplBase

      `getRequiredCasInterface, process`

    - ### Methods inherited from class org.apache.uima.analysis_component.Annotator_ImplBase

      `getCasInstancesRequired, hasNext, next`

    - ### Methods inherited from class org.apache.uima.analysis_component.AnalysisComponent_ImplBase

      `batchProcessComplete, collectionProcessComplete, reconfigure, setResultSpecification`

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

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

- - ### Field Detail

    - #### CHUNK_TYPE_PARAMETER

          public static final String CHUNK_TYPE_PARAMETER

      The chunk type parameter.
      See Also:
        Constant Field Values

    - #### CHUNK_TAG_FEATURE_PARAMETER

          public static final String CHUNK_TAG_FEATURE_PARAMETER

      The chunk tag feature parameter
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### Chunker

          public Chunker()

      Initializes a new instance.

      Note: Use `initialize(UimaContext)` to initialize this instance. Not use the constructor.

  - ### Method Detail

    - #### initialize

          public void initialize(org.apache.uima.UimaContext context)
                          throws org.apache.uima.resource.ResourceInitializationException

      Initializes the current instance with the given context.

      Note: Do all initialization in this method, do not use the constructor.

      Specified by:
        `initialize` in interface `org.apache.uima.analysis_component.AnalysisComponent`
      Overrides:
        `initialize` in class `org.apache.uima.analysis_component.AnalysisComponent_ImplBase`
      Throws:
        `org.apache.uima.resource.ResourceInitializationException`

    - #### typeSystemInit

          public void typeSystemInit(org.apache.uima.cas.TypeSystem typeSystem)
                              throws org.apache.uima.analysis_engine.AnalysisEngineProcessException

      Initializes the type system.
      Overrides:
        `typeSystemInit` in class `org.apache.uima.analysis_component.CasAnnotator_ImplBase`
      Throws:
        `org.apache.uima.analysis_engine.AnalysisEngineProcessException`

    - #### process

          public void process(org.apache.uima.cas.CAS tcas)

      Performs chunking on the given tcas object.
      Specified by:
        `process` in class `org.apache.uima.analysis_component.CasAnnotator_ImplBase`

    - #### destroy

          public void destroy()

      Releases allocated resources.
      Specified by:
        `destroy` in interface `org.apache.uima.analysis_component.AnalysisComponent`
      Overrides:
        `destroy` in class `org.apache.uima.analysis_component.AnalysisComponent_ImplBase`

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