Requirements

• Java 21 or later (tested with JDK 21)
• Apache Lucene / Solr 10.x

Download from Maven Central

• group id : com.github.lucene-gosen
• artifact id : lucene-gosen

There are three types of jar files:

• lucene-gosen-<version>.jar : Only java library, not include dictionary.
• lucene-gosen-<version>-ipadic.jar : Java library with IPA dictionary.
• lucene-gosen-<version>-naist-chasen.jar : Java library with Naist Chasen dictionary

Installation With Apache Solr 10.x:

1. Download jar file from Maven Central Repository
2. Create <your_solr_home>/<collection_dir>/lib and put this jar file in it.
3. Copy stopwords_ja.txt and stoptags_ja.txt into <your_solr_home>/<collection_dir>/conf/lang
4. Add "text_ja_gosen" fieldtype: see example/schema.xml.snippet for example configuration.

Please refer to example/ for an example japanese configuration with comments explaining what the various configuration options are.

Installation with Apache Lucene 10.x:

Using Maven

Add dependency to pom.xml.

    <dependencies>
        <dependency>
            <groupId>com.github.lucene-gosen</groupId>
            <artifactId>lucene-gosen</artifactId>
            <version>10.4.0</version>
            <classifier>ipadic</classifier>
        </dependency>
        ...
    </dependencies>

Non Maven project

1. Download jar file from Maven Central Repository
2. Add this jar file to your classpath, and use GosenAnalyzer, or make your own analyzer from the various filters. Its recommended you extend Analyzer to make any custom analyzer!

Build

You can build the project using Gradle. And you should use gradlew command.

Build only jar file without dictionary

$ ./gradlew jar

Build jar file with IPA dictionary

$ ./gradlew jarWithIpadic

Build jar file with Naist Chasen dictionary

$ ./gradlew jarWithNaistChasen

Please note that you should modify the following line in gradle.properties if you want to target a different Lucene version.

luceneVersion = 10.4.0