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Interface QueryService 

Service responsible for dealing with query related features of Data Persistence Service.

• execute

Executes the query and presents the result as an iterator of objects queried for. Will always return the full object from the database.

• executeProjection

Executes the query and presents the result as a list. Returns a list , of  the type of which is based on the Projection used.

• executeProjection

Executes the query and presents the result as a list. Will return a projection with an List on which the type of data will be an list of type Object array. 

• executeCount

Executes the query and presents the result as a count of how many instances are matched against the query.
Note: because of database limitations, at this moment this method is not optimized.

• executeDeletion

Deletes all matching objects and where appropriate deletes any related managed object.
Note: because of database limitations, at this moment this method is not optimized.

Interface QueryPathService

Service responsible for dealing with path query related features of Data Persistence Service.

• getTargetObjects

Executes the query ands gets the result as an iterable of 'full' objects queried. 

• projectResults

Project the results from points in the query path. Projections allow the user project single data elements from the objects which were found along a query path - these elements can be modelled (i.e. persistence object attributes) or non-modelled (i.e. object fields).