I try to implement a mechanism, which gets the found terms for a query from a single document (or indexed entity).

So far, I can get terms for all found documents using Lucene's highlighter package in conjunction with a custom Formatter. However, for performance reasons I would like to get the terms for a single document (based on the entity id).

How do I restrict the (FullText) query to match a single document in the index? A custom filter?

A filter is one way or you incorporate the entity id into the search. The id is always indexed as well. The field name is _ProjectionConstants.ID_

--Hardy