public override IFieldValue Decode(Stream inStream, Group decodeTemplate, Context context,
BitVectorReader presenceMapReader)
{
try
{
ScalarValue priorValue = null;
IDictionary dict = null;
QName key = Key;
ScalarValue value;
int pmapIndex = presenceMapReader.Index;
if (IsPresent(presenceMapReader))
{
if (context.TraceEnabled)
inStream = new RecordingInputStream(inStream);
if (!_operatorCodec.ShouldDecodeType)
return _operatorCodec.DecodeValue(null, null, this);
if (_operatorCodec.DecodeNewValueNeedsPrevious)
{
dict = context.GetDictionary(Dictionary);
priorValue = context.Lookup(dict, decodeTemplate, key);
ValidateDictionaryTypeAgainstFieldType(priorValue, _fastType);
}
ScalarValue decodedValue = _typeCodec.Decode(inStream);
value = _operatorCodec.DecodeValue(decodedValue, priorValue, this);
if (context.TraceEnabled)
context.DecodeTrace.Field(this, value, decodedValue,
((RecordingInputStream) inStream).Buffer, pmapIndex);
}
else
{
if (_operatorCodec.DecodeEmptyValueNeedsPrevious)
{
dict = context.GetDictionary(Dictionary);
priorValue = context.Lookup(dict, decodeTemplate, key);
ValidateDictionaryTypeAgainstFieldType(priorValue, _fastType);
}
value = _operatorCodec.DecodeEmptyValue(priorValue, this);
}
ValidateDecodedValueIsCorrectForType(value, _fastType);
#warning TODO: Review if this previous "if" statement is needed.
// if (Operator != Template.Operator.Operator.DELTA || value != null)
if (value != null &&
(_operatorCodec.DecodeNewValueNeedsPrevious || _operatorCodec.DecodeEmptyValueNeedsPrevious))
{
context.Store(dict ?? context.GetDictionary(Dictionary), decodeTemplate, key, value);
}
return value;
}
catch (DynErrorException e)
{
throw new DynErrorException(e, e.Error, "Error occurred while decoding {0}", this);
}
}
internal RecordingConnection(IConnection connection)
{
try
{
_recordingInputStream = new RecordingInputStream(connection.InputStream.BaseStream);
_recordingOutputStream = new RecordingOutputStream(connection.OutputStream.BaseStream);
_inStream = new StreamReader(_recordingInputStream);
_outStream = new StreamWriter(_recordingOutputStream);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}