}

        final UnicodeBlock block = UnicodeBlock.of(text.codePointAt(0));
        if (block == UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS //
                || block == UnicodeBlock.HIRAGANA //
                || block == UnicodeBlock.KATAKANA //
                || block == UnicodeBlock.HANGUL_SYLLABLES //
        ) {
            return QueryBuilders.prefixQuery(f, text);
        }

import org.opensearch.core.common.Strings;

import com.ibm.icu.text.Transliterator;

public class KatakanaConverter implements ReadingConverter {

    protected final Transliterator transliterator = Transliterator.getInstance("Hiragana-Katakana");

    protected volatile boolean initialized = false;

    protected TokenizerFactory tokenizerFactory = null;

    public KatakanaConverter() {
        // nothing
    }

    protected final Client client;
    private final SuggestSettings settings;
    protected final AnalyzerSettings analyzerSettings;

    protected final Transliterator transliterator = Transliterator.getInstance("Hiragana-Katakana");

    public AnalyzerConverter(final Client client, final SuggestSettings settings) {
        this.client = client;
        this.settings = settings;
        this.analyzerSettings = settings.analyzer();
    }