NSPredicate-MongoDB-Adaptor

This class translates an NSPredicate query into to an appropriate mongodb query encapsulated within an NSDictionary.

The resulting NSDictionary may then be serialised (Using NSJSONSerialization for example) into a JSON format to be interpreted by mongodb.

Use cases: Makes it very easy to construct queries to send to mongodb based backend platforms such as Deployd

##Supported query types: ###logical

• $not
• $and
• $or

###comparison

• $lt
• $lte
• $gt
• $gte
• $ne
• $regex

###membership

• $in
• $geoWithin

###javascript

• $where