java - Querying Mapped Superclasses or Equivalent -

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i have 3 classes subclasses of abstract superclass automobile. i'm using single table inheritance model , @mappedsuperclass automobile class. subclasses car, truck, , van.

i want query automobile class, have different subclasses returned. i've written couple queries , done research, seems not possible query against mappedsuperclasses. have tried nativesqlqueries, can't seem able figure out how specifiy multiple resultsetmappings.

is there anyway accomplish this?

you cannot use mapped-superclass in query. if want use automobile in query, don't mark mapped-superclass, instead mark entity.

following jpa 2.0 spec, second paragraph what's relevant in case -

2.11.2 mapped superclasses

an entity may inherit superclass provides persistent entity state , mapping information, not entity. typically, purpose of such mapped superclass define state , mapping information common multiple entity classes.

a mapped superclass, unlike entity, not queryable , must not passed argument entitymanager or query operations. persistent relationships defined mapped superclass must unidirectional.


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