mausch/SolrNet — pull request #55 by arafalov (2012-07-27 14:37:12+00:00)
Title: Improve null handling for & and | during query composition

Made Query composition & and | deal more gracefully with nulls by just
keeping non-null expression. This allows for easier query buildilng in
the loops by starting with NULL and just adding to it as appropriate.
Simplifies expressions like this:
finalQuery = (finalQuery == null) ? schemaQuery : (finalQuery &&
schemaQuery);

(My first ever pull request - hopefully, I got it right)