When my code receives a FieldEntry, I'd like to check its type whether is expected by calling getEntryType(). Its type is of rfa::common::UInt8. My code also needs to access this entry's data by calling getData(). I was told that L2 market data update timestamp for example FID 6527 is of type UINT64 (LV_TIM_MS) and FID 14268 is of TIME (LV_TIM_NS)type. How to check the the return type from getEntryType() is either UINT64 or TIME ?
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How to check the the return type from getEntryType() is either UINT64 or TIME ?
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Thanks for reaching out to us.
getEntryType() is a method of DataEntry which is a parent class of FieldEntry and other entries.
Therefore, the getEntryType method is used to indicate the following entry types
enum EntryTypes
{
VectorEntryEnum = 0xF1, // Offset avoids overlap with DataEnumeration.
ElementEntryEnum,
FieldEntryEnum,
MapEntryEnum,
FilterEntryEnum,
ArrayEntryEnum,
SeriesEntryEnum
};
The FieldEntryEnum is 243.
To check the data type in the FileEntry, you need the RDM Field dictionary. The code looks like this:
void Decoder::decodeFieldEntry( const FieldEntry& input )
{
_pCurrentFidDef = &_rRDMFieldDictionary.getFidDef( input.getFieldID() );
...
fieldName = _pCurrentFidDef->getName();
_out->outBegin( input, fieldName.c_str() );
decodeData( input.getData(static_cast<UInt8>(_pCurrentFidDef->getOMMType())) );
...
}
The code gets FidDefinition from RDMFieldDictioary by using a field ID. Then, it gets the data type from the getOMMType() method. The getOMMType() method returns DataBufferEnumeration.
enum DataBufferEnumeration
{
...
Int64Enum= 3,
UInt64Enum= 4,
...
TimeEnum= 10,
...
}
For more information, please refer to the StarterConsumer example in the RFA C++ package.
Please feel free to reach out if you have any further questions.
