Class JapaneseKatakanaUppercaseFilter

  • All Implemented Interfaces:
    Closeable, AutoCloseable, Unwrappable<TokenStream>

    public final class JapaneseKatakanaUppercaseFilter
    extends TokenFilter
    A TokenFilter that normalizes small letters (捨て仮名) in katakana into normal letters. For instance, "ストップウォッチ" will be translated to "ストツプウオツチ".

    This filter is useful if you want to search against old style Japanese text such as patents, legal, contract policies, etc.