org.apache.lucene.analysis

## Class MockTokenFilter

- java.lang.Object
- - org.apache.lucene.util.AttributeSource
  - - org.apache.lucene.analysis.TokenStream
    - - org.apache.lucene.analysis.TokenFilter
      - - org.apache.lucene.analysis.MockTokenFilter

- All Implemented Interfaces:
    Closeable, AutoCloseable

      public final class MockTokenFilter
      extends TokenFilter

  A tokenfilter for testing that removes terms accepted by a DFA.
  - Union a list of singletons to act like a stopfilter.
  - Use the complement to act like a keepwordfilter
  - Use a regex like `.{12,}` to act like a lengthfilter

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

      `AttributeSource.State`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static CharacterRunAutomaton` | `EMPTY_STOPSET` Empty set of stopwords
    `static CharacterRunAutomaton` | `ENGLISH_STOPSET` Set of common english stopwords

    - ### Fields inherited from class org.apache.lucene.analysis.TokenFilter

      `input`

    - ### Fields inherited from class org.apache.lucene.analysis.TokenStream

      `DEFAULT_TOKEN_ATTRIBUTE_FACTORY`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `MockTokenFilter(TokenStream input, CharacterRunAutomaton filter)` Create a new MockTokenFilter.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `end()`
    `boolean` | `incrementToken()`
    `void` | `reset()`

    - ### Methods inherited from class org.apache.lucene.analysis.TokenFilter

      `close`

    - ### Methods inherited from class org.apache.lucene.util.AttributeSource

      `addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, endAttributes, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, removeAllAttributes, restoreState, toString`

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

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### EMPTY_STOPSET

          public static final CharacterRunAutomaton EMPTY_STOPSET

      Empty set of stopwords

    - #### ENGLISH_STOPSET

          public static final CharacterRunAutomaton ENGLISH_STOPSET

      Set of common english stopwords

  - ### Constructor Detail

    - #### MockTokenFilter

          public MockTokenFilter(TokenStream input,
                                 CharacterRunAutomaton filter)

      Create a new MockTokenFilter.
      Parameters:
        `input` - TokenStream to filter
        `filter` - DFA representing the terms that should be removed.

  - ### Method Detail

    - #### incrementToken

          public boolean incrementToken()
                                 throws IOException

      Specified by:
        `incrementToken` in class `TokenStream`
      Throws:
        `IOException`

    - #### end

          public void end()
                   throws IOException

      Overrides:
        `end` in class `TokenFilter`
      Throws:
        `IOException`

    - #### reset

          public void reset()
                     throws IOException

      Overrides:
        `reset` in class `TokenFilter`
      Throws:
        `IOException`

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