hi,
See the below code:
Criteria criteria = fSession.createCriteria(c)
.add(Restrictions.eq("sentiment", new Long(-12)));

fullTextQuery = fullextSession.createFullTextQuery(lucenceQuery, myclass.class).setCriteriaQuery(criteria);

fullTextQuery.list(); - Here i am geting expected results

But if use

fullTextQuery.getResultSize(); - Here i am getting wong results.It's give total records which is before applying criteria query.

another thing is,if i call fullTextQuery.list() , SQL query is printing in console.But if call fullTextQuery.getResultSize() is not printed sql query in console