org.apache.lucene.analysis.cjk

Class CJKBigramFilter

  • All Implemented Interfaces:
    Closeable, AutoCloseable


    public final class CJKBigramFilter
    extends TokenFilter
    Forms bigrams of CJK terms that are generated from StandardTokenizer or ICUTokenizer.

    CJK types are set by these tokenizers, but you can also use CJKBigramFilter(TokenStream, int) to explicitly control which of the CJK scripts are turned into bigrams.

    By default, when a CJK character has no adjacent characters to form a bigram, it is output in unigram form. If you want to always output both unigrams and bigrams, set the outputUnigrams flag in CJKBigramFilter(TokenStream, int, boolean). This can be used for a combined unigram+bigram approach.

    In all cases, all non-CJK input is passed thru unmodified.