NGramTokenFilter (Lucene 2.4.1 API)
Keywords: org.apache.lucene.analysis.ngram.NGramTokenFilter class

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## org.apache.lucene.analysis.ngram
Class NGramTokenFilter

    java.lang.Object
      org.apache.lucene.analysis.TokenStream
          org.apache.lucene.analysis.TokenFilter
              org.apache.lucene.analysis.ngram.NGramTokenFilter

    public class NGramTokenFilter

extends TokenFilter

Tokenizes the input into n-grams of the given size(s).

Field Summary
`static int` | `DEFAULT_MAX_NGRAM_SIZE`
`static int` | `DEFAULT_MIN_NGRAM_SIZE`

Fields inherited from class org.apache.lucene.analysis.TokenFilter
`input`

Constructor Summary
`NGramTokenFilter(TokenStream input)` Creates NGramTokenFilter with default min and max n-grams.
`NGramTokenFilter(TokenStream input, int minGram, int maxGram)` Creates NGramTokenFilter with given min and max n-grams.

Method Summary
`Token` | `next(Token reusableToken)` Returns the next token in the stream, or null at EOS.

Methods inherited from class org.apache.lucene.analysis.TokenFilter
`close, reset`

Methods inherited from class org.apache.lucene.analysis.TokenStream
`next`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### DEFAULT_MIN_NGRAM_SIZE

    public static final int DEFAULT_MIN_NGRAM_SIZE

See Also:
  Constant Field Values

### DEFAULT_MAX_NGRAM_SIZE

    public static final int DEFAULT_MAX_NGRAM_SIZE

See Also:
  Constant Field Values

Constructor Detail

### NGramTokenFilter

    public NGramTokenFilter(TokenStream input,
                            int minGram,
                            int maxGram)

  Creates NGramTokenFilter with given min and max n-grams.

  Parameters:
    `input` - TokenStream holding the input to be tokenized
    `minGram` - the smallest n-gram to generate
    `maxGram` - the largest n-gram to generate

### NGramTokenFilter

    public NGramTokenFilter(TokenStream input)

  Creates NGramTokenFilter with default min and max n-grams.

  Parameters:
    `input` - TokenStream holding the input to be tokenized

Method Detail

### next

    public final Token next(Token reusableToken)
                     throws IOException

  Returns the next token in the stream, or null at EOS.

  Overrides:
    `next` in class `TokenStream`
  Throws:
    `IOException`

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