public ByteBuffer Serialize(out bool hasMetaData, object obj)
{
if (obj == null)
{
hasMetaData = false;
_writer.WriteUInt8(0); // null
return(_writer.GetDataAndRewind());
}
try
{
_newTypeFound = false;
StoreObject(obj);
_visited.Clear();
if (!_newTypeFound)
{
// No unknown metadata found - to be optimistic pays off
hasMetaData = false;
return(_writer.GetDataAndRewind());
}
StoreNewDescriptors(obj);
if (_typeOrDescriptor2InfoNew.Count > 0)
{
_writer.Rewind();
if (MergeTypesByShapeAndStoreNew())
{
_typeOrDescriptor2InfoNew.Clear();
_visited.Clear();
hasMetaData = true;
return(_writer.GetDataAndRewind());
}
_typeOrDescriptor2InfoNew.Clear();
}
_visited.Clear();
_newTypeFound = false;
StoreObject(obj);
if (_newTypeFound)
{
throw new BTDBException("Forgot descriptor or type");
}
_visited.Clear();
hasMetaData = false;
return(_writer.GetDataAndRewind());
}
catch
{
_visited.Clear();
_typeOrDescriptor2InfoNew.Clear();
_writer.Rewind();
throw;
}
}
void CalculateSecondaryKey(IInternalObjectDBTransaction tr, IList <KeyValuePair <uint, SecondaryKeyInfo> > indexes)
{
var keyWriter = new ByteBufferWriter();
var enumeratorType = typeof(RelationEnumerator <>).MakeGenericType(_clientType);
keyWriter.WriteByteArrayRaw(ObjectDB.AllRelationsPKPrefix);
keyWriter.WriteVUInt32(Id);
var enumerator = (IEnumerator)Activator.CreateInstance(enumeratorType, tr, this, keyWriter.GetDataAndRewind().ToAsyncSafe(), new SimpleModificationCounter());
var keySavers = new Action <IInternalObjectDBTransaction, AbstractBufferedWriter, object> [indexes.Count];
for (int i = 0; i < indexes.Count; i++)
{
keySavers[i] = CreateSaver(ClientRelationVersionInfo.GetSecondaryKeyFields(indexes[i].Key),
$"Relation_{Name}_Upgrade_SK_{indexes[i].Value.Name}_KeySaver");
}
while (enumerator.MoveNext())
{
var obj = enumerator.Current;
tr.TransactionProtector.Start();
tr.KeyValueDBTransaction.SetKeyPrefix(ObjectDB.AllRelationsSKPrefix);
for (int i = 0; i < indexes.Count; i++)
{
keyWriter.WriteVUInt32(Id);
keyWriter.WriteVUInt32(indexes[i].Key);
keySavers[i](tr, keyWriter, obj);
var keyBytes = keyWriter.GetDataAndRewind();
if (!tr.KeyValueDBTransaction.CreateOrUpdateKeyValue(keyBytes, ByteBuffer.NewEmpty()))
{
throw new BTDBException("Internal error, secondary key bytes must be always unique.");
}
}
}
}
