Package org.apache.lucene.analysis.classic

# Class ClassicAnalyzer

java.lang.Object
org.apache.lucene.analysis.Analyzer
org.apache.lucene.analysis.StopwordAnalyzerBase
org.apache.lucene.analysis.classic.ClassicAnalyzer

All Implemented Interfaces:
  `Closeable`, `AutoCloseable`

public final class ClassicAnalyzer extends StopwordAnalyzerBase
Filters `ClassicTokenizer` with `ClassicFilter`, `LowerCaseFilter` and `StopFilter`, using a list of English stop words.

ClassicAnalyzer was named StandardAnalyzer in Lucene versions prior to 3.1. As of 3.1, `StandardAnalyzer` implements Unicode text segmentation, as specified by UAX#29.

Since:
  3.1

- ## Nested Class Summary

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

  `Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents`

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final int`
  `DEFAULT_MAX_TOKEN_LENGTH`
  Default maximum allowed token length
  `static final CharArraySet`
  `STOP_WORDS_SET`
  An unmodifiable set containing some common English words that are usually not useful for searching.

  ### Fields inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase

  `stopwords`

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

  `GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `ClassicAnalyzer()`
  Builds an analyzer with the default stop words (`STOP_WORDS_SET`).
  `ClassicAnalyzer(Reader stopwords)`
  Builds an analyzer with the stop words from the given reader.
  `ClassicAnalyzer(CharArraySet stopWords)`
  Builds an analyzer with the given stop words.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected Analyzer.TokenStreamComponents`
  `createComponents(String fieldName)`
  `int`
  `getMaxTokenLength()`
  `protected TokenStream`
  `normalize(String fieldName, TokenStream in)`
  `void`
  `setMaxTokenLength(int length)`
  Set maximum allowed token length.

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

  `getStopwordSet, loadStopwordSet, loadStopwordSet`

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

  `attributeFactory, close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, initReader, initReaderForNormalization, normalize, tokenStream, tokenStream`

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

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

- ## Field Details

  - ### DEFAULT_MAX_TOKEN_LENGTH

    public static final int DEFAULT_MAX_TOKEN_LENGTH
    Default maximum allowed token length
    See Also:
      - Constant Field Values

  - ### STOP_WORDS_SET

    public static final CharArraySet STOP_WORDS_SET
    An unmodifiable set containing some common English words that are usually not useful for searching.

- ## Constructor Details

  - ### ClassicAnalyzer

    public ClassicAnalyzer(CharArraySet stopWords)
    Builds an analyzer with the given stop words.
    Parameters:
      `stopWords` - stop words

  - ### ClassicAnalyzer

    public ClassicAnalyzer()
    Builds an analyzer with the default stop words (`STOP_WORDS_SET`).

  - ### ClassicAnalyzer

    public ClassicAnalyzer(Reader stopwords) throws IOException
    Builds an analyzer with the stop words from the given reader.
    Parameters:
      `stopwords` - Reader to read stop words from
    Throws:
      `IOException`
    See Also:
      - `WordlistLoader.getWordSet(Reader)`

- ## Method Details

  - ### setMaxTokenLength

    public void setMaxTokenLength(int length)
    Set maximum allowed token length. If a token is seen that exceeds this length then it is discarded. This setting only takes effect the next time tokenStream or tokenStream is called.

  - ### getMaxTokenLength

    public int getMaxTokenLength()
    See Also:
      - `setMaxTokenLength(int)`

  - ### createComponents

    protected Analyzer.TokenStreamComponents createComponents(String fieldName)
    Specified by:
      `createComponents` in class `Analyzer`

  - ### normalize

    protected TokenStream normalize(String fieldName, TokenStream in)
    Overrides:
      `normalize` in class `Analyzer`