/**
* 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;
}
/**
* Find entities according to the given example entity.
*
* @param type The entity type.
* @param entity The example entity.
* @param <T> The entity type.
* @return A {@link com.buschmais.xo.api.ResultIterable}.
*/
private <T> ResultIterable<T> findByExample(
Class<?> type, Map<PrimitivePropertyMethodMetadata<PropertyMetadata>, Object> entity) {
EntityTypeMetadata<EntityMetadata> entityTypeMetadata =
sessionContext.getMetadataProvider().getEntityMetadata(type);
EntityDiscriminator entityDiscriminator =
entityTypeMetadata.getDatastoreMetadata().getDiscriminator();
if (entityDiscriminator == null) {
throw new XOException(
"Type "
+ type.getName()
+ " has no discriminator (i.e. cannot be identified in datastore).");
}
ResultIterator<Entity> iterator =
sessionContext
.getDatastoreSession()
.getDatastoreEntityManager()
.findEntity(entityTypeMetadata, entityDiscriminator, entity);
ResultIterator<T> resultIterator =
new ResultIterator<T>() {
@Override
public boolean hasNext() {
return iterator.hasNext();
}
@Override
public T next() {
Entity entity = iterator.next();
AbstractInstanceManager<EntityId, Entity> entityInstanceManager =
sessionContext.getEntityInstanceManager();
return entityInstanceManager.readInstance(entity);
}
@Override
public void remove() {
throw new UnsupportedOperationException("Cannot remove instance.");
}
@Override
public void close() {
iterator.close();
}
};
XOTransaction xoTransaction = sessionContext.getXOTransaction();
final ResultIterator<T> transactionalIterator =
xoTransaction != null
? new TransactionalResultIterator<>(resultIterator, xoTransaction)
: resultIterator;
return sessionContext
.getInterceptorFactory()
.addInterceptor(
new AbstractResultIterable<T>() {
@Override
public ResultIterator<T> iterator() {
return transactionalIterator;
}
},
ResultIterable.class);
}
@Override
public <T> T getRepository(Class<T> repositoryType) {
RepositoryTypeMetadata repositoryMetadata =
sessionContext.getMetadataProvider().getRepositoryMetadata(repositoryType);
RepositoryProxyMethodService<Entity, Relation> proxyMethodService =
new RepositoryProxyMethodService<>(sessionContext);
RepositoryInvocationHandler invocationHandler =
new RepositoryInvocationHandler(proxyMethodService, this);
T instance =
sessionContext
.getProxyFactory()
.createInstance(invocationHandler, new Class<?>[0], repositoryType);
return sessionContext.getInterceptorFactory().addInterceptor(instance, repositoryType);
}
@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.");
}
}
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;
}
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;
}
@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 <T> ResultIterable<T> find(final Class<T> type, final Object value) {
EntityTypeMetadata<EntityMetadata> entityTypeMetadata =
sessionContext.getMetadataProvider().getEntityMetadata(type);
IndexedPropertyMethodMetadata indexedProperty = entityTypeMetadata.getIndexedProperty();
Map<PrimitivePropertyMethodMetadata<PropertyMetadata>, Object> exampleEntity = new HashMap<>(1);
if (indexedProperty != null) {
exampleEntity.put(indexedProperty.getPropertyMethodMetadata(), value);
} else {
exampleEntity.put(null, value);
}
return findByExample(type, exampleEntity);
}
@Override
public <DS> DS getDatastoreSession(Class<DS> sessionType) {
DatastoreSession<
EntityId,
Entity,
EntityMetadata,
EntityDiscriminator,
RelationId,
Relation,
RelationMetadata,
RelationDiscriminator,
PropertyMetadata>
datastoreSession = sessionContext.getDatastoreSession();
return sessionType.cast(datastoreSession);
}
/**
* Setup an example entity.
*
* @param type The type.
* @param example The provided example.
* @param <T> The type.
* @return The example.
*/
private <T> Map<PrimitivePropertyMethodMetadata<PropertyMetadata>, Object> prepareExample(
Example<T> example, Class<?> type, Class<?>... types) {
Map<PrimitivePropertyMethodMetadata<PropertyMetadata>, Object> exampleEntity = new HashMap<>();
InstanceInvocationHandler invocationHandler =
new InstanceInvocationHandler(
exampleEntity, new ExampleProxyMethodService(type, sessionContext));
List<Class<?>> effectiveTypes = new ArrayList<>();
effectiveTypes.add(type);
effectiveTypes.addAll(Arrays.asList(types));
T instance =
sessionContext
.getProxyFactory()
.createInstance(
invocationHandler,
effectiveTypes.toArray(new Class<?>[effectiveTypes.size()]),
CompositeObject.class);
example.prepare(instance);
return exampleEntity;
}
@Override
public <T> Query<T> createQuery(Class<T> query) {
XOQueryImpl<T, ?, Class<T>, Entity, Relation> xoQuery =
new XOQueryImpl<>(sessionContext, query, query);
return sessionContext.getInterceptorFactory().addInterceptor(xoQuery, Query.class);
}
@Override
public XOTransaction currentTransaction() {
return sessionContext.getXOTransaction();
}
@Override
public Set<ConstraintViolation<Object>> validate() {
return sessionContext.getInstanceValidationService().validate();
}
@Override
public Query<CompositeRowObject> createQuery(String query) {
XOQueryImpl<CompositeRowObject, ?, String, Entity, Relation> xoQuery =
new XOQueryImpl<>(sessionContext, query);
return sessionContext.getInterceptorFactory().addInterceptor(xoQuery, Query.class);
}
@Override
public <I> void registerInstanceListener(I instanceListener) {
sessionContext.getInstanceListenerService().registerInstanceListener(instanceListener);
}
@Override
public void flush() {
sessionContext.getCacheSynchronizationService().flush();
}
@Override
public <Q> Query<CompositeRowObject> createQuery(Class<Q> query, Class<?>... types) {
XOQueryImpl<CompositeRowObject, ?, Class<Q>, Entity, Relation> xoQuery =
new XOQueryImpl<>(sessionContext, query, query, Arrays.asList(types));
return sessionContext.getInterceptorFactory().addInterceptor(xoQuery, Query.class);
}
@Override
public void close() {
sessionContext.getEntityInstanceManager().close();
sessionContext.getRelationInstanceManager().close();
sessionContext.getDatastoreSession().close();
}