private TypeMetadataSet<EntityTypeMetadata<EntityMetadata>> getEffectiveTypes(
Class<?> type, Class<?>... types) {
MetadataProvider<EntityMetadata, EntityDiscriminator, RelationMetadata, RelationDiscriminator>
metadataProvider = sessionContext.getMetadataProvider();
TypeMetadataSet<EntityTypeMetadata<EntityMetadata>> effectiveTypes = new TypeMetadataSet<>();
effectiveTypes.add(metadataProvider.getEntityMetadata(type));
for (Class<?> otherType : types) {
effectiveTypes.add(metadataProvider.getEntityMetadata(otherType));
}
return effectiveTypes;
}
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;
}