/// <summary>
/// Initializes a new instance of the DataElement class.
/// </summary>
/// <param name="type">data element type</param>
/// <param name="data">Specifies the data of the element.</param>
public DataElement(DataElementType type, DataElementData data)
: base(StreamObjectTypeHeaderStart.DataElement)
{
if (!dataElementDataTypeMapping.Keys.Contains(type))
{
throw new InvalidOperationException("Invalid argument type value" + (int)type);
}
this.DataElementType = type;
this.Data = data;
this.DataElementExtendedGUID = new ExGuid(SequenceNumberGenerator.GetCurrentSerialNumber(), Guid.NewGuid());
this.SerialNumber = new SerialNumber(Guid.NewGuid(), SequenceNumberGenerator.GetCurrentSerialNumber());
}
/// <summary>
/// Used to de-serialize the element.
/// </summary>
/// <param name="byteArray">A Byte array</param>
/// <param name="currentIndex">Start position</param>
/// <param name="lengthOfItems">The length of the items</param>
protected override void DeserializeItemsFromByteArray(byte[] byteArray, ref int currentIndex, int lengthOfItems)
{
int index = currentIndex;
try
{
this.DataElementExtendedGUID = BasicObject.Parse <ExGuid>(byteArray, ref index);
this.SerialNumber = BasicObject.Parse <SerialNumber>(byteArray, ref index);
this.DataElementType = (DataElementType)BasicObject.Parse <Compact64bitInt>(byteArray, ref index).DecodedValue;
}
catch (BasicObjectParseErrorException e)
{
throw new DataElementParseErrorException(index, e);
}
if (index - currentIndex != lengthOfItems)
{
throw new DataElementParseErrorException(currentIndex, "Failed to check the data element header length, whose value does not cover the DataElementExtendedGUID, SerialNumber and DataElementType", null);
}
if (dataElementDataTypeMapping.ContainsKey(this.DataElementType))
{
this.Data = Activator.CreateInstance(dataElementDataTypeMapping[this.DataElementType]) as DataElementData;
try
{
index += this.Data.DeserializeDataElementDataFromByteArray(byteArray, index);
}
catch (BasicObjectParseErrorException e1)
{
throw new DataElementParseErrorException(index, e1);
}
catch (StreamObjectParseErrorException e2)
{
throw new DataElementParseErrorException(index, e2);
}
}
else
{
throw new DataElementParseErrorException(index, "Failed to create specific data element instance with the type " + this.DataElementType, null);
}
currentIndex = index;
}
