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This sounds like a great way to seamlessly integrate a database model with full text search.

Based on Apache Lucene, Hibernate Search focuses on ease of use and
ease of configuration, lowering the barrier to entry of Lucene and its
integration with a domain model.

Seamless integration with the Hibernate and Java Persistence query
model: Hibernate Search embraces both the Hibernate and Java
Persistence semantic and APIs. As a result, switching from a Hibernate
Query Language (HQL) query to a full text query requires only minimal
changes to the application.

Sharing the same index for several classes or splitting a given class into several indexes.