Adding a @Where annotation for Entity classes

Adding the equivalent of a @Where annotation like the one available for hibernate as contained in the link below would be quite useful. It would be awesome too if the annotation accepts the condition in JPQL (Java Persistence Query Language) and not SQL like the hibernate annotation

[https://docs.jboss.org/hibernate/orm/4.1/javadocs/org/hibernate/annotations/Where.html](url)

Start by reviewing the issue request and the linked Hibernate @Where annotation documentation. Define the intended JPQL-based behavior and acceptance criteria for entity classes before identifying implementation and test locations; done means the feature's scope and semantics are agreed.

Written by the indexing model from the issue text.