@Override
public <T> void delete(T instance) {
AbstractInstanceManager<EntityId, Entity> entityInstanceManager =
sessionContext.getEntityInstanceManager();
AbstractInstanceManager<RelationId, Relation> relationInstanceManager =
sessionContext.getRelationInstanceManager();
DatastoreSession<
EntityId,
Entity,
EntityMetadata,
EntityDiscriminator,
RelationId,
Relation,
RelationMetadata,
RelationDiscriminator,
PropertyMetadata>
datastoreSession = sessionContext.getDatastoreSession();
if (entityInstanceManager.isInstance(instance)) {
Entity entity = entityInstanceManager.getDatastoreType(instance);
sessionContext.getInstanceListenerService().preDelete(instance);
datastoreSession.getDatastoreEntityManager().deleteEntity(entity);
entityInstanceManager.removeInstance(instance);
entityInstanceManager.closeInstance(instance);
sessionContext.getInstanceListenerService().postDelete(instance);
} else if (relationInstanceManager.isInstance(instance)) {
Relation relation = relationInstanceManager.getDatastoreType(instance);
sessionContext.getInstanceListenerService().preDelete(instance);
datastoreSession.getDatastoreRelationManager().deleteRelation(relation);
relationInstanceManager.removeInstance(instance);
relationInstanceManager.closeInstance(instance);
sessionContext.getInstanceListenerService().postDelete(instance);
} else {
throw new XOException(instance + " is not a managed XO instance.");
}
}
/**
* Create a new {@link CompositeObject} instance using an example.
*
* @param type The interface the property type shall implement.
* @param types Additional interfaces the entity type shall implement.
* @param exampleEntity The example instance.
* @return The {@link CompositeObject} instance.
*/
private CompositeObject createByExample(
Class<?> type,
Class<?>[] types,
Map<PrimitivePropertyMethodMetadata<PropertyMetadata>, Object> exampleEntity) {
TypeMetadataSet<EntityTypeMetadata<EntityMetadata>> effectiveTypes =
getEffectiveTypes(type, types);
Set<EntityDiscriminator> entityDiscriminators =
sessionContext.getMetadataProvider().getEntityDiscriminators(effectiveTypes);
DatastoreSession<
EntityId,
Entity,
EntityMetadata,
EntityDiscriminator,
RelationId,
Relation,
RelationMetadata,
RelationDiscriminator,
PropertyMetadata>
datastoreSession = sessionContext.getDatastoreSession();
Entity entity =
datastoreSession
.getDatastoreEntityManager()
.createEntity(effectiveTypes, entityDiscriminators, exampleEntity);
AbstractInstanceManager<EntityId, Entity> entityInstanceManager =
sessionContext.getEntityInstanceManager();
CompositeObject instance = entityInstanceManager.createInstance(entity);
sessionContext.getInstanceListenerService().postCreate(instance);
return instance;
}
private <S, R, T> R createByExample(
S from,
Class<R> relationType,
T to,
Map<PrimitivePropertyMethodMetadata<PropertyMetadata>, Object> example) {
MetadataProvider<EntityMetadata, EntityDiscriminator, RelationMetadata, RelationDiscriminator>
metadataProvider = sessionContext.getMetadataProvider();
AbstractRelationPropertyMethodMetadata<?> fromProperty =
metadataProvider.getPropertyMetadata(from.getClass(), relationType, FROM);
AbstractRelationPropertyMethodMetadata<?> toProperty =
metadataProvider.getPropertyMetadata(to.getClass(), relationType, TO);
Entity entity = sessionContext.getEntityInstanceManager().getDatastoreType(from);
R instance =
sessionContext
.getEntityPropertyManager()
.createRelationReference(entity, fromProperty, to, toProperty, example);
sessionContext.getInstanceListenerService().postCreate(instance);
return instance;
}
@Override
public <T, M> CompositeObject migrate(
T instance,
MigrationStrategy<T, M> migrationStrategy,
Class<M> targetType,
Class<?>... targetTypes) {
AbstractInstanceManager<EntityId, Entity> entityInstanceManager =
sessionContext.getEntityInstanceManager();
Entity entity = entityInstanceManager.getDatastoreType(instance);
DatastoreSession<
EntityId,
Entity,
EntityMetadata,
EntityDiscriminator,
RelationId,
Relation,
RelationMetadata,
RelationDiscriminator,
PropertyMetadata>
datastoreSession = sessionContext.getDatastoreSession();
Set<EntityDiscriminator> entityDiscriminators =
datastoreSession.getDatastoreEntityManager().getEntityDiscriminators(entity);
MetadataProvider<EntityMetadata, EntityDiscriminator, RelationMetadata, RelationDiscriminator>
metadataProvider = sessionContext.getMetadataProvider();
TypeMetadataSet<EntityTypeMetadata<EntityMetadata>> types =
metadataProvider.getTypes(entityDiscriminators);
TypeMetadataSet<EntityTypeMetadata<EntityMetadata>> effectiveTargetTypes =
getEffectiveTypes(targetType, targetTypes);
Set<EntityDiscriminator> targetEntityDiscriminators =
metadataProvider.getEntityDiscriminators(effectiveTargetTypes);
datastoreSession
.getDatastoreEntityManager()
.migrateEntity(
entity, types, entityDiscriminators, effectiveTargetTypes, targetEntityDiscriminators);
entityInstanceManager.removeInstance(instance);
CompositeObject migratedInstance = entityInstanceManager.updateInstance(entity);
if (migrationStrategy != null) {
migrationStrategy.migrate(instance, migratedInstance.as(targetType));
}
entityInstanceManager.closeInstance(instance);
return migratedInstance;
}
@Override
public <T, Id> Id getId(T instance) {
AbstractInstanceManager<EntityId, Entity> entityInstanceManager =
sessionContext.getEntityInstanceManager();
AbstractInstanceManager<RelationId, Relation> relationInstanceManager =
sessionContext.getRelationInstanceManager();
if (entityInstanceManager.isInstance(instance)) {
Entity entity = entityInstanceManager.getDatastoreType(instance);
return (Id)
sessionContext.getDatastoreSession().getDatastoreEntityManager().getEntityId(entity);
} else if (relationInstanceManager.isInstance(instance)) {
Relation relation = relationInstanceManager.getDatastoreType(instance);
return (Id)
sessionContext
.getDatastoreSession()
.getDatastoreRelationManager()
.getRelationId(relation);
}
throw new XOException(instance + " is not a managed XO instance.");
}
@Override
public void close() {
sessionContext.getEntityInstanceManager().close();
sessionContext.getRelationInstanceManager().close();
sessionContext.getDatastoreSession().close();
}