Find operation with range of dates in entity services

Hello,

I created an entity service called A with 3 attributes: description (string), startDate (date) and endDate (date). I need to have a find operation that retrieves all A instances where startDate and endDate are in specific ranges of date.

For example, operation needs to return all instances where startDate is between 01/03/2007 and 05/03/2007 and/or my endDate is between 10/03/2007 and 15/03/2007.

Is it possible to do using entity services operations ? If yes, how can I do that ?

Thanks in advance,