https://hibernate.atlassian.net/browse/HSEARCH-5068 paves the way for mapping non-ORM entities in the Hibernate ORM mapper, by introducing an annotation to mark a type as an entity, as well as a generic way of configuring loading.

This could enable searching across indexes bound to ORM entities and non-ORM entities, which can be useful for some use cases.

However, only the the API and supporting infrastructure are there: the Hibernate ORM mapper itself is not ready. Its APIs may need some adjustments (how do you open a search session with non-ORM loading context?), documentation as well, and we would need to add tests (for search, mass indexing, …). That’s what this issue is about.