public void testConverterToForward() {
    assertThat(UPPER_UNDERSCORE.converterTo(UPPER_CAMEL).convert("FOO_BAR")).isEqualTo("FooBar");
    assertThat(UPPER_UNDERSCORE.converterTo(LOWER_CAMEL).convert("FOO_BAR")).isEqualTo("fooBar");
    assertThat(UPPER_CAMEL.converterTo(UPPER_UNDERSCORE).convert("FooBar")).isEqualTo("FOO_BAR");
    assertThat(LOWER_CAMEL.converterTo(UPPER_UNDERSCORE).convert("fooBar")).isEqualTo("FOO_BAR");
  }

        // Test that multiple converter instances work independently
        ReadingConverter converter1 = new TestReadingConverter();
        ReadingConverter converter2 = new TestReadingConverter();

        converter1.init();
        converter2.init();

        String text = "test";
        String field = "content";

        List<String> readings1 = converter1.convert(text, field, "en");

        List<String> results = converter.convert(text, field, "en");

        assertNotNull(results);
    }

    @Test
    public void testMultipleConverterInstances() throws IOException {
        // Test that multiple converter instances work independently
        AnalyzerConverter converter1 = new AnalyzerConverter(client, settings);
        AnalyzerConverter converter2 = new AnalyzerConverter(client, settings);

        };
    Function<Object, String> backward = toStringFunction();

    Converter<String, Number> converter = Converter.<String, Number>from(forward, backward);

    assertNull(converter.convert(null));
    assertNull(converter.reverse().convert(null));

    assertEquals((Integer) 5, converter.convert("5"));
    assertEquals("5", converter.reverse().convert(5));
  }

import org.apache.lucene.search.TermQuery;
import org.codelibs.core.CoreLibConstants;
import org.codelibs.fess.suggest.converter.AnalyzerConverter;
import org.codelibs.fess.suggest.converter.KatakanaToAlphabetConverter;
import org.codelibs.fess.suggest.converter.ReadingConverter;
import org.codelibs.fess.suggest.converter.ReadingConverterChain;
import org.codelibs.fess.suggest.entity.SuggestItem;

- **Multi-language Support**: Built-in support for Japanese text processing with Kuromoji analyzer
- **Popular Words Analytics**: Track and analyze frequently searched terms
- **Flexible Text Processing**: Configurable converters and normalizers for text transformation
- **OpenSearch Integration**: Seamless integration with OpenSearch/Elasticsearch clusters
- **Asynchronous Operations**: Non-blocking suggestion requests with callback support

        final ReadingConverter converter;
        if (langs == null || langs.length == 0) {
            converter = new LangAnalyzerConverter(null);
        } else {
            final ReadingConverterChain chain = new ReadingConverterChain();
            for (final String lang : langs) {
                chain.addConverter(new LangAnalyzerConverter(lang));
            }
            converter = chain;
        }

import java.util.Map;

import org.codelibs.core.beans.Converter;
import org.codelibs.core.beans.converter.DateConverter;
import org.codelibs.core.beans.converter.NumberConverter;
import org.codelibs.core.beans.converter.SqlDateConverter;
import org.codelibs.core.beans.converter.TimeConverter;
import org.codelibs.core.beans.converter.TimestampConverter;

/**

 */
package org.codelibs.fess.suggest;

import static org.codelibs.opensearch.runner.OpenSearchRunner.newConfigs;

import java.io.IOException;
import java.util.List;

import org.codelibs.fess.suggest.converter.ReadingConverter;
import org.codelibs.fess.suggest.normalizer.Normalizer;
import org.codelibs.fess.suggest.settings.SuggestSettings;
import org.codelibs.opensearch.runner.OpenSearchRunner;

        return bufferIndex - start;
    }

    @Override
    public String toString() {
        return ("NetShareEnumResponse[" + super.toString() + ",status=" + getStatus() + ",converter=" + this.converter + ",entriesReturned="
                + getNumEntries() + ",totalAvailableEntries=" + this.totalAvailableEntries + "]");
    }