org.hibernate.TypeMismatchException#org.hibernate.type.EmbeddedComponentType源码实例Demo

private void loadByDerivedIdentitySimplePkValue(
		LoadEvent event,
		LoadEventListener.LoadType options,
		EntityPersister dependentPersister,
		EmbeddedComponentType dependentIdType,
		EntityPersister parentPersister) {
	final EntityKey parentEntityKey = event.getSession().generateEntityKey( event.getEntityId(), parentPersister );
	final Object parent = doLoad( event, parentPersister, parentEntityKey, options );

	final Serializable dependent = (Serializable) dependentIdType.instantiate( parent, event.getSession() );
	dependentIdType.setPropertyValues( dependent, new Object[] {parent}, dependentPersister.getEntityMode() );
	final EntityKey dependentEntityKey = event.getSession().generateEntityKey( dependent, dependentPersister );
	event.setEntityId( dependent );

	event.setResult( doLoad( event, dependentPersister, dependentEntityKey, options ) );
}
 

private CompletionStage<Void> checkIdClass(
		final EntityPersister persister,
		final LoadEvent event,
		final LoadEventListener.LoadType loadType,
		final Class<?> idClass) {
	// we may have the kooky jpa requirement of allowing find-by-id where
	// "id" is the "simple pk value" of a dependent objects parent.  This
	// is part of its generally goofy "derived identity" "feature"
	final IdentifierProperty identifierProperty = persister.getEntityMetamodel().getIdentifierProperty();
	if ( identifierProperty.isEmbedded() ) {
		final EmbeddedComponentType dependentIdType = (EmbeddedComponentType) identifierProperty.getType();
		if ( dependentIdType.getSubtypes().length == 1 ) {
			final Type singleSubType = dependentIdType.getSubtypes()[0];
			if ( singleSubType.isEntityType() ) {
				final EntityType dependentParentType = (EntityType) singleSubType;
				final SessionFactoryImplementor factory = event.getSession().getFactory();
				final Type dependentParentIdType = dependentParentType.getIdentifierOrUniqueKeyType( factory );
				if ( dependentParentIdType.getReturnedClass().isInstance( event.getEntityId() ) ) {
					// yep that's what we have...
					return loadByDerivedIdentitySimplePkValue( event, loadType, persister,
							dependentIdType, factory.getMetamodel().entityPersister( dependentParentType.getAssociatedEntityName() )
					);
				}
			}
		}
	}
	throw new TypeMismatchException(
			"Provided id of the wrong type for class " + persister.getEntityName() + ". Expected: " + idClass + ", got " + event.getEntityId().getClass() );
}
 

private CompletionStage<Void> loadByDerivedIdentitySimplePkValue(LoadEvent event, LoadEventListener.LoadType options,
		EntityPersister dependentPersister, EmbeddedComponentType dependentIdType, EntityPersister parentPersister) {
	EventSource session = event.getSession();
	final EntityKey parentEntityKey = session.generateEntityKey( event.getEntityId(), parentPersister );
	return doLoad( event, parentPersister, parentEntityKey, options )
			.thenApply( checkEntityFound( session, parentEntityKey.getEntityName(), parentEntityKey ) )
			.thenApply( parent -> {
				final Serializable dependent = (Serializable) dependentIdType.instantiate( parent, session );
				dependentIdType.setPropertyValues( dependent, new Object[] {parent}, dependentPersister.getEntityMode() );
				event.setEntityId( dependent );
				return session.generateEntityKey( dependent, dependentPersister );
			} )
			.thenCompose( dependentEntityKey -> doLoad( event, dependentPersister, dependentEntityKey, options ) )
			.thenAccept( event::setResult );
}
 

private void checkIdClass(
		final EntityPersister persister,
		final LoadEvent event,
		final LoadEventListener.LoadType loadType,
		final Class idClass) {
			// we may have the kooky jpa requirement of allowing find-by-id where
		// "id" is the "simple pk value" of a dependent objects parent.  This
		// is part of its generally goofy "derived identity" "feature"
		if ( persister.getEntityMetamodel().getIdentifierProperty().isEmbedded() ) {
			final EmbeddedComponentType dependentIdType =
					(EmbeddedComponentType) persister.getEntityMetamodel().getIdentifierProperty().getType();
			if ( dependentIdType.getSubtypes().length == 1 ) {
				final Type singleSubType = dependentIdType.getSubtypes()[0];
				if ( singleSubType.isEntityType() ) {
					final EntityType dependentParentType = (EntityType) singleSubType;
					final Type dependentParentIdType = dependentParentType.getIdentifierOrUniqueKeyType( event.getSession().getFactory() );
					if ( dependentParentIdType.getReturnedClass().isInstance( event.getEntityId() ) ) {
						// yep that's what we have...
						loadByDerivedIdentitySimplePkValue(
								event,
								loadType,
								persister,
								dependentIdType,
								event.getSession().getFactory().getEntityPersister( dependentParentType.getAssociatedEntityName() )
						);
						return;
					}
				}
			}
		}
		throw new TypeMismatchException(
				"Provided id of the wrong type for class " + persister.getEntityName() + ". Expected: " + idClass
						+ ", got " + event.getEntityId().getClass()
		);
}
 

private Type buildType() {
	// TODO : temporary initial step towards HHH-1907
	ComponentMetamodel metamodel = new ComponentMetamodel( this );
	if ( isEmbedded() ) {
		return new EmbeddedComponentType( metamodel );
	}
	else {
		return new ComponentType( metamodel );
	}
}