Yes, everything should be done through the Domain (given it is defined).
Only for Hyperon versions previous to 1.5.79. Every version since 1.5.79 runs on Java 8.
Hyperon Persistence does not support collections of primitive type – you will have to create type such as StringContainer which has a single field “string” and then use it as Collection.
In column „IN” definition choose matcher: between/ie or between/ii Now in column „IN” you can set range like: a-b or a:b Available matchers:
It’s really risky, because Vaadin GUI needs more RAM, at least in range : 512 MB to 2GB. However it is recommended to stay with max 3GB.