///////////////////////////////////////////////////////////////////////
#region Private Methods
/// <summary>
/// Reads an instance of a type from the buffer,
/// </summary>
private int ReadType(TsCCpxContext context, out TsCCpxComplexValue complexValue)
{
complexValue = null;
TypeDescription type = context.Type;
int startIndex = context.Index;
byte bitOffset = 0;
ArrayList fieldValues = new ArrayList();
for (int ii = 0; ii < type.Field.Length; ii++)
{
FieldType field = type.Field[ii];
TsCCpxComplexValue fieldValue = new TsCCpxComplexValue {
Name = (field.Name != null && field.Name.Length != 0) ? field.Name : String.Format("[{0}]", ii), Type = null, Value = null
};
// check if additional padding is required after the end of a bit field.
if (bitOffset != 0)
{
if (field.GetType() != typeof(BitString))
{
context.Index++;
bitOffset = 0;
}
}
int bytesRead = 0;
if (IsArrayField(field))
{
bytesRead = ReadArrayField(context, field, ii, fieldValues, out fieldValue.Value);
}
else if (field.GetType() == typeof(TypeReference))
{
object typeValue = null;
bytesRead = ReadField(context, (TypeReference)field, out typeValue);
// assign a name appropriate for the current context.
fieldValue.Name = field.Name;
fieldValue.Type = ((TsCCpxComplexValue)typeValue).Type;
fieldValue.Value = ((TsCCpxComplexValue)typeValue).Value;
}
else
{
bytesRead = ReadField(context, field, ii, fieldValues, out fieldValue.Value, ref bitOffset);
}
if (bytesRead == 0 && bitOffset == 0)
{
throw new TsCCpxInvalidDataInBufferException(String.Format("Could not read field '{0}' in type '{1}'.", field.Name, type.TypeID));
}
context.Index += bytesRead;
// assign a value for field type.
if (fieldValue.Type == null)
{
fieldValue.Type = Technosoftware.DaAeHdaClient.OpcConvert.ToString(fieldValue.Value.GetType());
}
fieldValues.Add(fieldValue);
}
// skip padding bits at the end of a type.
if (bitOffset != 0)
{
context.Index++;
}
complexValue = new TsCCpxComplexValue();
complexValue.Name = type.TypeID;
complexValue.Type = type.TypeID;
complexValue.Value = (TsCCpxComplexValue[])fieldValues.ToArray(typeof(TsCCpxComplexValue));
return(context.Index - startIndex);
}
///////////////////////////////////////////////////////////////////////
#region Private Methods
/// <summary>
/// Writes an instance of a type to the buffer.
/// </summary>
private int WriteType(TsCCpxContext context, TsCCpxComplexValue namedValue)
{
TypeDescription type = context.Type;
int startIndex = context.Index;
TsCCpxComplexValue[] fieldValues = null;
if (namedValue.Value == null || namedValue.Value.GetType() != typeof(TsCCpxComplexValue[]))
{
throw new TsCCpxInvalidDataToWriteException("Type instance does not contain field values.");
}
fieldValues = (TsCCpxComplexValue[])namedValue.Value;
if (fieldValues.Length != type.Field.Length)
{
throw new TsCCpxInvalidDataToWriteException("Type instance does not contain the correct number of fields.");
}
byte bitOffset = 0;
for (int ii = 0; ii < type.Field.Length; ii++)
{
FieldType field = type.Field[ii];
TsCCpxComplexValue fieldValue = fieldValues[ii];
if (bitOffset != 0)
{
if (field.GetType() != typeof(BitString))
{
context.Index++;
bitOffset = 0;
}
}
int bytesWritten = 0;
if (IsArrayField(field))
{
bytesWritten = WriteArrayField(context, field, ii, fieldValues, fieldValue.Value);
}
else if (field.GetType() == typeof(TypeReference))
{
bytesWritten = WriteField(context, (TypeReference)field, fieldValue);
}
else
{
bytesWritten = WriteField(context, field, ii, fieldValues, fieldValue.Value, ref bitOffset);
}
if (bytesWritten == 0 && bitOffset == 0)
{
throw new TsCCpxInvalidDataToWriteException(String.Format("Could not write field '{0}' in type '{1}'.", field.Name, type.TypeID));
}
context.Index += bytesWritten;
}
if (bitOffset != 0)
{
context.Index++;
}
return(context.Index - startIndex);
}