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javax.persistence.metamodel.Metamodel - JPA interface

javax.persistence.metamodel
Interface Metamodel

Provides access to the metamodel of persistent entities in the persistence unit.
Since:
JPA 2.0
EmbeddableType<X> embeddable(Class<X> cls)
Return the metamodel embeddable type representing the embeddable class.
Return the metamodel embeddable type representing the embeddable class.
Parameters:
cls - the type of the represented embeddable class
Returns:
the metamodel embeddable type
Throws:
IllegalArgumentException - if not an embeddable class
Since:
JPA 2.0
EntityType<X> entity(Class<X> cls)
Return the metamodel entity type representing the entity.
Return the metamodel entity type representing the entity.
Parameters:
cls - the type of the represented entity
Returns:
the metamodel entity type
Throws:
IllegalArgumentException - if not an entity
Since:
JPA 2.0
Set<EmbeddableType<?>> getEmbeddables()
Return the metamodel embeddable types.
Return the metamodel embeddable types. Returns empty set if there are no embeddable types.
Returns:
the metamodel embeddable types
Since:
JPA 2.0
Set<EntityType<?>> getEntities()
Return the metamodel entity types.
Return the metamodel entity types.
Returns:
the metamodel entity types
Since:
JPA 2.0
Set<ManagedType<?>> getManagedTypes()
Return the metamodel managed types.
Return the metamodel managed types.
Returns:
the metamodel managed types
Since:
JPA 2.0
ManagedType<X> managedType(Class<X> cls)
Return the metamodel managed type representing the entity, mapped superclass, or embeddable class.
Return the metamodel managed type representing the entity, mapped superclass, or embeddable class.
Parameters:
cls - the type of the represented managed class
Returns:
the metamodel managed type
Throws:
IllegalArgumentException - if not a managed class
Since:
JPA 2.0
This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
Object DB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.