Bobo is a Faceted Search implementation written purely in Java, an extension of Apache Lucene
'com.browseengine.bobo:bobo-contrib:3.2.0'
<dependency>
<groupId>com.browseengine.bobo</groupId>
<artifactId>bobo-contrib</artifactId>
<version>3.2.0</version>
</dependency>
<dependency org="com.browseengine.bobo" name="bobo-contrib" rev="3.2.0"/>
"com.browseengine.bobo", "bobo-contrib", "3.2.0"