/// <summary>
/// Decode field message data delta frame from decoder and using a DataSetReader
/// </summary>
/// <param name="binaryDecoder"></param>
/// <param name="dataSetReader"></param>
/// <returns></returns>
private DataSet DecodeMessageDataDeltaFrame(BinaryDecoder binaryDecoder, DataSetReaderDataType dataSetReader)
{
DataSetMetaDataType dataSetMetaData = dataSetReader.DataSetMetaData;
try
{
FieldTypeEncodingMask fieldType = (FieldTypeEncodingMask)(((byte)DataSetFlags1 & kFieldTypeUsedBits) >> 1);
if (dataSetMetaData != null)
{
TargetVariablesDataType targetVariablesData =
ExtensionObject.ToEncodeable(dataSetReader.SubscribedDataSet) as TargetVariablesDataType;
// create dataFields collection
List <Field> dataFields = new List <Field>();
for (int i = 0; i < dataSetMetaData.Fields.Count; i++)
{
Field dataField = new Field();
dataField.FieldMetaData = dataSetMetaData?.Fields[i];
if (targetVariablesData != null && targetVariablesData.TargetVariables != null &&
i < targetVariablesData.TargetVariables.Count)
{
// remember the target Attribute and target nodeId
dataField.TargetAttribute = targetVariablesData.TargetVariables[i].AttributeId;
dataField.TargetNodeId = targetVariablesData.TargetVariables[i].TargetNodeId;
}
dataFields.Add(dataField);
}
// read number of fields encoded in this delta frame message
ushort fieldCount = fieldCount = binaryDecoder.ReadUInt16("FieldCount");
for (int i = 0; i < fieldCount; i++)
{
ushort fieldIndex = binaryDecoder.ReadUInt16("FieldIndex");
// update value in dataFields
switch (fieldType)
{
case FieldTypeEncodingMask.Variant:
dataFields[fieldIndex].Value = new DataValue(binaryDecoder.ReadVariant("FieldValue"));
break;
case FieldTypeEncodingMask.DataValue:
dataFields[fieldIndex].Value = binaryDecoder.ReadDataValue("FieldValue");
break;
case FieldTypeEncodingMask.RawData:
FieldMetaData fieldMetaData = dataSetMetaData.Fields[fieldIndex];
if (fieldMetaData != null)
{
var decodedValue = DecodeRawData(binaryDecoder, fieldMetaData);
dataFields[fieldIndex].Value = new DataValue(new Variant(decodedValue));
}
break;
case FieldTypeEncodingMask.Reserved:
// ignore
break;
}
}
DataSet dataSet = new DataSet(dataSetMetaData?.Name);
dataSet.DataSetMetaData = dataSetMetaData;
dataSet.Fields = dataFields.ToArray();
dataSet.IsDeltaFrame = true;
dataSet.DataSetWriterId = DataSetWriterId;
dataSet.SequenceNumber = SequenceNumber;
return(dataSet);
}
}
catch (Exception ex)
{
Utils.Trace(ex, "UadpDataSetMessage.DecodeMessageDataDeltaFrame");
}
return(null);
}
/// <summary>
/// Decode a scalar type
/// </summary>
/// <param name="binaryDecoder"></param>
/// <param name="builtInType"></param>
/// <returns>The decoded object</returns>
private object DecodeRawScalar(BinaryDecoder binaryDecoder, byte builtInType)
{
switch ((BuiltInType)builtInType)
{
case BuiltInType.Boolean:
return(binaryDecoder.ReadBoolean(null));
case BuiltInType.SByte:
return(binaryDecoder.ReadSByte(null));
case BuiltInType.Byte:
return(binaryDecoder.ReadByte(null));
case BuiltInType.Int16:
return(binaryDecoder.ReadInt16(null));
case BuiltInType.UInt16:
return(binaryDecoder.ReadUInt16(null));
case BuiltInType.Int32:
return(binaryDecoder.ReadInt32(null));
case BuiltInType.UInt32:
return(binaryDecoder.ReadUInt32(null));
case BuiltInType.Int64:
return(binaryDecoder.ReadInt64(null));
case BuiltInType.UInt64:
return(binaryDecoder.ReadUInt64(null));
case BuiltInType.Float:
return(binaryDecoder.ReadFloat(null));
case BuiltInType.Double:
return(binaryDecoder.ReadDouble(null));
case BuiltInType.String:
return(binaryDecoder.ReadString(null));
case BuiltInType.DateTime:
return(binaryDecoder.ReadDateTime(null));
case BuiltInType.Guid:
return(binaryDecoder.ReadGuid(null));
case BuiltInType.ByteString:
return(binaryDecoder.ReadByteString(null));
case BuiltInType.XmlElement:
return(binaryDecoder.ReadXmlElement(null));
case BuiltInType.NodeId:
return(binaryDecoder.ReadNodeId(null));
case BuiltInType.ExpandedNodeId:
return(binaryDecoder.ReadExpandedNodeId(null));
case BuiltInType.StatusCode:
return(binaryDecoder.ReadStatusCode(null));
case BuiltInType.QualifiedName:
return(binaryDecoder.ReadQualifiedName(null));
case BuiltInType.LocalizedText:
return(binaryDecoder.ReadLocalizedText(null));
case BuiltInType.DataValue:
return(binaryDecoder.ReadDataValue(null));
case BuiltInType.Enumeration:
return(binaryDecoder.ReadInt32(null));
case BuiltInType.Variant:
return(binaryDecoder.ReadVariant(null));
case BuiltInType.ExtensionObject:
return(binaryDecoder.ReadExtensionObject(null));
default:
return(null);
}
}
/// <summary>
/// Decode field message data key frame from decoder and using a DataSetReader
/// </summary>
/// <param name="binaryDecoder"></param>
/// <param name="dataSetReader"></param>
/// <returns></returns>
private DataSet DecodeMessageDataKeyFrame(BinaryDecoder binaryDecoder, DataSetReaderDataType dataSetReader)
{
DataSetMetaDataType dataSetMetaData = dataSetReader.DataSetMetaData;
try
{
ushort fieldCount = 0;
FieldTypeEncodingMask fieldType = (FieldTypeEncodingMask)(((byte)DataSetFlags1 & kFieldTypeUsedBits) >> 1);
if (fieldType == FieldTypeEncodingMask.RawData)
{
if (dataSetMetaData != null)
{
// metadata should provide field count
fieldCount = (ushort)dataSetMetaData.Fields.Count;
}
}
else
{
fieldCount = binaryDecoder.ReadUInt16("DataSetFieldCount");
}
TargetVariablesDataType targetVariablesData =
ExtensionObject.ToEncodeable(dataSetReader.SubscribedDataSet) as TargetVariablesDataType;
// check configuration version
List <DataValue> dataValues = new List <DataValue>();
switch (fieldType)
{
case FieldTypeEncodingMask.Variant:
for (int i = 0; i < fieldCount; i++)
{
dataValues.Add(new DataValue(binaryDecoder.ReadVariant("Variant")));
}
break;
case FieldTypeEncodingMask.DataValue:
for (int i = 0; i < fieldCount; i++)
{
dataValues.Add(binaryDecoder.ReadDataValue("DataValue"));
}
break;
case FieldTypeEncodingMask.RawData:
if (dataSetMetaData != null)
{
for (int i = 0; i < fieldCount; i++)
{
FieldMetaData fieldMetaData = dataSetMetaData.Fields[i];
if (fieldMetaData != null)
{
var decodedValue = DecodeRawData(binaryDecoder, fieldMetaData);
dataValues.Add(new DataValue(new Variant(decodedValue)));
}
}
}
// else the decoding is compromised for RawData type
break;
case FieldTypeEncodingMask.Reserved:
// ignore
break;
}
List <Field> dataFields = new List <Field>();
for (int i = 0; i < dataValues.Count; i++)
{
Field dataField = new Field();
dataField.FieldMetaData = dataSetMetaData?.Fields[i];
dataField.Value = dataValues[i];
if (targetVariablesData != null && targetVariablesData.TargetVariables != null &&
i < targetVariablesData.TargetVariables.Count)
{
// remember the target Attribute and target nodeId
dataField.TargetAttribute = targetVariablesData.TargetVariables[i].AttributeId;
dataField.TargetNodeId = targetVariablesData.TargetVariables[i].TargetNodeId;
}
dataFields.Add(dataField);
}
if (dataFields.Count == 0)
{
return(null); //the dataset cannot be decoded
}
DataSet dataSet = new DataSet(dataSetMetaData?.Name);
dataSet.DataSetMetaData = dataSetMetaData;
dataSet.Fields = dataFields.ToArray();
dataSet.DataSetWriterId = DataSetWriterId;
dataSet.SequenceNumber = SequenceNumber;
return(dataSet);
}
catch (Exception ex)
{
Utils.Trace(ex, "UadpDataSetMessage.DecodeMessageDataKeyFrame");
return(null);
}
}
