org.apache.lucene.analysis

## Class MockAnalyzer

- java.lang.Object
- - org.apache.lucene.analysis.Analyzer
  - - org.apache.lucene.analysis.MockAnalyzer

- All Implemented Interfaces:
    Closeable, AutoCloseable

      public final class MockAnalyzer
      extends Analyzer

  Analyzer for testing

  This analyzer is a replacement for Whitespace/Simple/KeywordAnalyzers for unit tests. If you are testing a custom component such as a queryparser or analyzer-wrapper that consumes analysis streams, it's a great idea to test it with this analyzer instead. MockAnalyzer has the following behavior:

  - By default, the assertions in `MockTokenizer` are turned on for extra checks that the consumer is consuming properly. These checks can be disabled with `setEnableChecks(boolean)`.
  - Payload data is randomly injected into the stream for more thorough testing of payloads.
  See Also:
    `MockTokenizer`

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer

      `Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents`

  - ### Field Summary

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

      `GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `MockAnalyzer(Random random)` Create a Whitespace-lowercasing analyzer with no stopwords removal.
    `MockAnalyzer(Random random, CharacterRunAutomaton runAutomaton, boolean lowerCase)` Calls `MockAnalyzer(random, runAutomaton, lowerCase, MockTokenFilter.EMPTY_STOPSET, false`).
    `MockAnalyzer(Random random, CharacterRunAutomaton runAutomaton, boolean lowerCase, CharacterRunAutomaton filter)` Creates a new MockAnalyzer.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Analyzer.TokenStreamComponents` | `createComponents(String fieldName)`
    `int` | `getOffsetGap(String fieldName)` Get the offset gap between tokens in fields if several fields with the same name were added.
    `int` | `getPositionIncrementGap(String fieldName)`
    `protected TokenStream` | `normalize(String fieldName, TokenStream in)`
    `void` | `setEnableChecks(boolean enableChecks)` Toggle consumer workflow checking: if your test consumes tokenstreams normally you should leave this enabled.
    `void` | `setMaxTokenLength(int length)` Toggle maxTokenLength for MockTokenizer
    `void` | `setOffsetGap(int offsetGap)` Set a new offset gap which will then be added to the offset when several fields with the same name are indexed
    `void` | `setPositionIncrementGap(int positionIncrementGap)`

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

      `attributeFactory, close, getReuseStrategy, getVersion, initReader, initReaderForNormalization, normalize, setVersion, tokenStream, tokenStream`

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

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

- - ### Constructor Detail

    - #### MockAnalyzer

          public MockAnalyzer(Random random,
                              CharacterRunAutomaton runAutomaton,
                              boolean lowerCase,
                              CharacterRunAutomaton filter)

      Creates a new MockAnalyzer.
      Parameters:
        `random` - Random for payloads behavior
        `runAutomaton` - DFA describing how tokenization should happen (e.g. [a-zA-Z]+)
        `lowerCase` - true if the tokenizer should lowercase terms
        `filter` - DFA describing how terms should be filtered (set of stopwords, etc)

    - #### MockAnalyzer

          public MockAnalyzer(Random random,
                              CharacterRunAutomaton runAutomaton,
                              boolean lowerCase)

      Calls `MockAnalyzer(random, runAutomaton, lowerCase, MockTokenFilter.EMPTY_STOPSET, false`).

    - #### MockAnalyzer

          public MockAnalyzer(Random random)

      Create a Whitespace-lowercasing analyzer with no stopwords removal.

      Calls `MockAnalyzer(random, MockTokenizer.WHITESPACE, true, MockTokenFilter.EMPTY_STOPSET, false`).

  - ### Method Detail

    - #### createComponents

          public Analyzer.TokenStreamComponents createComponents(String fieldName)

      Specified by:
        `createComponents` in class `Analyzer`

    - #### normalize

          protected TokenStream normalize(String fieldName,
                                          TokenStream in)

      Overrides:
        `normalize` in class `Analyzer`

    - #### setPositionIncrementGap

          public void setPositionIncrementGap(int positionIncrementGap)

    - #### getPositionIncrementGap

          public int getPositionIncrementGap(String fieldName)

      Overrides:
        `getPositionIncrementGap` in class `Analyzer`

    - #### setOffsetGap

          public void setOffsetGap(int offsetGap)

      Set a new offset gap which will then be added to the offset when several fields with the same name are indexed
      Parameters:
        `offsetGap` - The offset gap that should be used.

    - #### getOffsetGap

          public int getOffsetGap(String fieldName)

      Get the offset gap between tokens in fields if several fields with the same name were added.
      Overrides:
        `getOffsetGap` in class `Analyzer`
      Parameters:
        `fieldName` - Currently not used, the same offset gap is returned for each field.

    - #### setEnableChecks

          public void setEnableChecks(boolean enableChecks)

      Toggle consumer workflow checking: if your test consumes tokenstreams normally you should leave this enabled.

    - #### setMaxTokenLength

          public void setMaxTokenLength(int length)

      Toggle maxTokenLength for MockTokenizer

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