client side reference expansion

[schleichardt]

• for some batch jobs server side reference expansion costs a lot of time and traffic, with client side reference expansion that could be saved
• so we could provide a sphere client decorator which removes the expansion paths out of the queries and then gets the JSON, the extracted expansion paths are used on the client side to add the fetched objects to the JSON and also put it into a cache, then the JSON deserialization will create the expanded Java objects.

@lauraluiz what do you think of it?

[lauraluiz]

Are you having in mind the issue of duplicated references when expanding product types in product queries?

[katmatt]

Use case:

• get product categories which just have two product types, if you then exapnd the product type it will be fetched again and again.