ModeShape/modeshape — pull request #1121 by VadymKarko (2014-05-16 08:19:31+00:00)
Title: Mode 2174

Here is a one solution. This approach is based on using Lucene post processing constraints.
Every query is checked for presence of empty string constraint (see class ```LuceneQueryDistributor```) and if so, then push this constraint into post processing.