Package org.apache.lucene.analysis.shingle

# Class ShingleAnalyzerWrapper

java.lang.Object
org.apache.lucene.analysis.Analyzer
org.apache.lucene.analysis.AnalyzerWrapper
org.apache.lucene.analysis.shingle.ShingleAnalyzerWrapper

All Implemented Interfaces:
  `Closeable`, `AutoCloseable`

public final class ShingleAnalyzerWrapper extends AnalyzerWrapper
A ShingleAnalyzerWrapper wraps a `ShingleFilter` around another `Analyzer`.

A shingle is another name for a token based n-gram.

Since:
  3.1

- ## 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
  Description
  `ShingleAnalyzerWrapper()`
  Wraps `StandardAnalyzer`.
  `ShingleAnalyzerWrapper(int minShingleSize, int maxShingleSize)`
  Wraps `StandardAnalyzer`.
  `ShingleAnalyzerWrapper(Analyzer defaultAnalyzer)`
  `ShingleAnalyzerWrapper(Analyzer defaultAnalyzer, int maxShingleSize)`
  `ShingleAnalyzerWrapper(Analyzer defaultAnalyzer, int minShingleSize, int maxShingleSize)`
  `ShingleAnalyzerWrapper(Analyzer delegate, int minShingleSize, int maxShingleSize, String tokenSeparator, boolean outputUnigrams, boolean outputUnigramsIfNoShingles, String fillerToken)`
  Creates a new ShingleAnalyzerWrapper

- ## Method Summary

  Modifier and Type
  Method
  Description
  `String`
  `getFillerToken()`
  `int`
  `getMaxShingleSize()`
  The max shingle (token ngram) size
  `int`
  `getMinShingleSize()`
  The min shingle (token ngram) size
  `String`
  `getTokenSeparator()`
  `final Analyzer`
  `getWrappedAnalyzer(String fieldName)`
  `boolean`
  `isOutputUnigrams()`
  `boolean`
  `isOutputUnigramsIfNoShingles()`
  `protected Analyzer.TokenStreamComponents`
  `wrapComponents(String fieldName, Analyzer.TokenStreamComponents components)`

  ### Methods inherited from class org.apache.lucene.analysis.AnalyzerWrapper

  `attributeFactory, createComponents, getOffsetGap, getPositionIncrementGap, initReader, initReaderForNormalization, normalize, wrapReader, wrapReaderForNormalization, wrapTokenStreamForNormalization`

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

  `close, getReuseStrategy, normalize, tokenStream, tokenStream`

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

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

- ## Constructor Details

  - ### ShingleAnalyzerWrapper

    public ShingleAnalyzerWrapper(Analyzer defaultAnalyzer)

  - ### ShingleAnalyzerWrapper

    public ShingleAnalyzerWrapper(Analyzer defaultAnalyzer, int maxShingleSize)

  - ### ShingleAnalyzerWrapper

    public ShingleAnalyzerWrapper(Analyzer defaultAnalyzer, int minShingleSize, int maxShingleSize)

  - ### ShingleAnalyzerWrapper

    public ShingleAnalyzerWrapper(Analyzer delegate, int minShingleSize, int maxShingleSize, String tokenSeparator, boolean outputUnigrams, boolean outputUnigramsIfNoShingles, String fillerToken)
    Creates a new ShingleAnalyzerWrapper
    Parameters:
      `delegate` - Analyzer whose TokenStream is to be filtered
      `minShingleSize` - Min shingle (token ngram) size
      `maxShingleSize` - Max shingle size
      `tokenSeparator` - Used to separate input stream tokens in output shingles
      `outputUnigrams` - Whether or not the filter shall pass the original tokens to the output stream
      `outputUnigramsIfNoShingles` - Overrides the behavior of outputUnigrams==false for those times when no shingles are available (because there are fewer than minShingleSize tokens in the input stream)? Note that if outputUnigrams==true, then unigrams are always output, regardless of whether any shingles are available.
      `fillerToken` - filler token to use when positionIncrement is more than 1

  - ### ShingleAnalyzerWrapper

    public ShingleAnalyzerWrapper()
    Wraps `StandardAnalyzer`.

  - ### ShingleAnalyzerWrapper

    public ShingleAnalyzerWrapper(int minShingleSize, int maxShingleSize)
    Wraps `StandardAnalyzer`.

- ## Method Details

  - ### getMaxShingleSize

    public int getMaxShingleSize()
    The max shingle (token ngram) size
    Returns:
      The max shingle (token ngram) size

  - ### getMinShingleSize

    public int getMinShingleSize()
    The min shingle (token ngram) size
    Returns:
      The min shingle (token ngram) size

  - ### getTokenSeparator

    public String getTokenSeparator()

  - ### isOutputUnigrams

    public boolean isOutputUnigrams()

  - ### isOutputUnigramsIfNoShingles

    public boolean isOutputUnigramsIfNoShingles()

  - ### getFillerToken

    public String getFillerToken()

  - ### getWrappedAnalyzer

    public final Analyzer getWrappedAnalyzer(String fieldName)
    Specified by:
      `getWrappedAnalyzer` in class `AnalyzerWrapper`

  - ### wrapComponents

    protected Analyzer.TokenStreamComponents wrapComponents(String fieldName, Analyzer.TokenStreamComponents components)
    Overrides:
      `wrapComponents` in class `AnalyzerWrapper`