CAY-1860  In-memory matching of DataObjects against ObjectId or int

optimizing null handling

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1510017 13f79535-47bb-0310-9956-ffa450edef68
CAY-1860  In-memory matching of DataObjects against ObjectId or int

switching other expressions to evaluator

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1510018 13f79535-47bb-0310-9956-ffa450edef68