I can't seem to find a way to map something like this:



Is there a simple way to do this? Am I missing something?

Thanks for your help!

Im not sure if you can map it exactly like that. I do know that you can map a collection of objects that have thier own collection though. So you would have an object like this:



Then map a Dictionary of ContractDates to another entity and then you will almost get what you are looking for.

I dont know the underlying reasons why you need a dictionary of a dictionary so maybe this will work for you and maybe not.

unfortunately, I need to have a dictionary in a dictionary, for efficient access to the data.

So isn't there any way to do that with Hibernate?

pejvan, why did you reject the provided solution and state that it won't work because of efficiency? In truth the provided solution should be just as efficient (or close enough to be irrelevant) to what you had requested. You will still have a dictionary with a containing dictionary. The access methods would be the same. Your hash would be on the same objects.

I think you dismissed the provided answer way too fast. If there is another reason besides efficiency, then maybe your answer makes sense. Otherwise, I would recommend trying the given solution.

Indeed, I might have been through the reply to quickly and I will a second thought on it!!!
Thank you both for pointing me a solution, and also for pointing me that I had dismissed it too quickly

I'll have to give it a try early next week, and will let you know.