EntrySerializer(String fieldId, Type type, BinarySerializerRepository serializerRepository) {
this.entryId = fieldId;
this.type = type;
this.metaData = ObjectUtil.checkNotNull(serializerRepository.getMetaData(type.getMetaDataId()));
this.serializerRepository = serializerRepository;
}
@CheckForNull
private GenericValue deserializeValue(
ByteReader source, @CheckForNull Type declaredType, @CheckForNull MetaData declaredMetaData) {
boolean optional = (declaredType == null || declaredType.isOptional());
MetaData actualMetaData = null;
if (declaredMetaData == null || declaredMetaData.getMetaType().isPolymorphic()) {
if ((declaredMetaData != null) && (declaredMetaData.getMetaType() == MetaType.ENTITY)) {
actualMetaData = BootStrap.ENTITY_ID;
} else {
// Polymorphic type: Read actual type or 'null'-type.
EntityId actualTypeId = serializerRepository.getEntityIdSerializer().deserialize(source);
if (!BootStrap.ID_NULL_REFERENCE.equals(actualTypeId)) {
actualMetaData = serializerRepository.getMetaData(actualTypeId);
}
}
} else {
// Non-polymorphic type: Do not read actual type.
if (!optional || source.getVarInt() != 0) {
actualMetaData = declaredMetaData;
}
}
if (actualMetaData == null) {
if (!optional) {
throw new SerializerException("Non-optional entry found to be null!");
}
return null;
}
switch (actualMetaData.getMetaType()) {
case ENTITY:
{
EntityId entityId = serializerRepository.getEntityIdSerializer().deserialize(source);
return BootStrap.ID_NULL_REFERENCE.equals(entityId) ? null : new EntityIdValue(entityId);
}
case PRIMITIVE:
{
Primitive primitive = Primitive.byEntityId(actualMetaData.getEntityId());
BinarySerializer<?> serializer =
serializerRepository.getPrimitiveSerializer(actualMetaData.getEntityId());
return new PrimitiveValue(primitive, serializer.deserialize(source));
}
case VALUE_OBJECT:
{
BinarySerializer<ObjectInfo> serializer =
serializerRepository.getBinarySerializer(actualMetaData.getEntityId());
return new ValueObjectValue(serializer.deserialize(source));
}
case COLLECTION:
{
// Read element MetaDataId.
EntityId elementMetaDataId =
serializerRepository.getEntityIdSerializer().deserialize(source);
// Read element count.
int count = MathUtil.longToInt(source.getVarInt());
// Read custom collection implementation data.
BinarySerializer<ObjectInfo> serializer =
serializerRepository.getBinarySerializer(actualMetaData.getEntityId());
ObjectInfo collectionInfo = serializer.deserialize(source);
// Read all elements.
ImmutableArrayList.Builder<GenericValue> builder = ImmutableArrayList.newBuilder(count);
for (int i = 0; i < count; ++i) {
Type elementType = (declaredType == null) ? null : declaredType.getElementType();
MetaData metaData =
(elementType == null)
? null
: serializerRepository.getMetaData(elementType.getMetaDataId());
GenericValue value = deserializeValue(source, elementType, metaData);
builder.add((value == null) ? GenericValue.nullValue() : value);
}
return new CollectionValue(collectionInfo, elementMetaDataId, builder.build());
}
default:
throw new IllegalStateException("Unknown MetaType " + actualMetaData.getMetaType());
}
}