@Override
public <E extends T, K> E findByKey(Class<E> type, K key) {
Type<E> entityType = entityModel.typeOf(type);
if (entityType.isCacheable() && entityCache != null) {
E entity = entityCache.get(type, key);
if (entity != null) {
return entity;
}
}
Set<Attribute<E, ?>> keys = entityType.getKeyAttributes();
if (keys.isEmpty()) {
throw new MissingKeyException();
}
Selection<? extends Result<E>> selection = select(type);
if (keys.size() == 1) {
QueryAttribute<E, Object> attribute = Attributes.query(keys.iterator().next());
selection.where(attribute.equal(key));
} else {
if (key instanceof CompositeKey) {
CompositeKey compositeKey = (CompositeKey) key;
for (Attribute<E, ?> attribute : keys) {
QueryAttribute<E, Object> keyAttribute = Attributes.query(attribute);
Object value = compositeKey.get(keyAttribute);
selection.where(keyAttribute.equal(value));
}
} else {
throw new IllegalArgumentException("CompositeKey required");
}
}
return selection.get().firstOrNull();
}
private void writeObject(ObjectOutputStream stream) throws IOException {
stream.defaultWriteObject();
Type<E> type = SerializationContext.getType(entityClass);
EntityProxy<E> proxy = type.proxyProvider().apply(entity);
for (Property<E, ?> property : proxy.filterProperties(getPropertyFilter())) {
Object value = property.get();
stream.writeObject(value);
}
}
private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
stream.defaultReadObject();
Type<E> type = SerializationContext.getType(entityClass);
entity = type.factory().get();
EntityProxy<E> proxy = type.proxyProvider().apply(entity);
for (Property<E, ?> property : proxy.filterProperties(getPropertyFilter())) {
Object value = stream.readObject();
property.setObject(value, PropertyState.LOADED);
}
}
@Override
public <E extends T> Insertion<? extends Result<Tuple>> insert(Class<E> type) {
checkClosed();
Type<E> entityType = context.getModel().typeOf(type);
Set<Expression<?>> keySelection = new LinkedHashSet<>();
for (Attribute<E, ?> attribute : entityType.getKeyAttributes()) {
keySelection.add((Expression<?>) attribute);
}
InsertReturningOperation operation = new InsertReturningOperation(context, keySelection);
return new QueryElement<>(INSERT, entityModel, operation).from(type);
}
@Override
public <E> EntityProxy<E> proxyOf(E entity, boolean forUpdate) {
checkClosed();
@SuppressWarnings("unchecked")
Type<E> type = (Type<E>) entityModel.typeOf(entity.getClass());
EntityProxy<E> proxy = type.getProxyProvider().apply(entity);
if (forUpdate && type.isReadOnly()) {
throw new ReadOnlyException();
}
if (forUpdate) {
EntityTransaction transaction = transactionProvider.get();
if (transaction != null && transaction.active()) {
transaction.addToTransaction(proxy);
}
}
return proxy;
}
