RE: [Quickfix-developers] checking for field before getting it?

[Rob K. <ro...@ri...>]

I wanted to try to avoid having to wrap each attempt to extract a tag =
with a try catch statment.  That is what I would have to do in order to =
ensure I can adiquitly handle all messages from my counterparty, while =
still extracting the maximum amount of data I can from each message. If =
there is no SecurityDesc, It isn't a big deal, I would still like to =
continue to process the message.  however, if there is a SecurityDesc, I =
would like to know what is is.  Maybe I'm just being lazy, but it dosent =
make sense to me to add four lines of code for each attempted =
extraction, when i can just use one to check for the field before trying =
to extract it.  something like

if(inMsg.SecurityDescIsPresent) mSecurityDesc =3D =
inMsg.getSecurityDesc();

rather than

try{
	mSecurityDesc =3D inMsg.getSecurityDesc();
}
catch(FieldNotFound e){
	//do nothing, really.
}


-----Original Message-----
From: Bishop, Barry [mailto:Bar...@gs...]
Sent: Friday, February 28, 2003 12:09 PM
To: Rob Kulseth
Subject: RE: [Quickfix-developers] checking for field before getting it?


Hi Rob,

I assume something is going wrong when you try and extract a value for a =
tag
that is not in the message.

Are you catching FieldNotFound exception?

This will be thrown if your tag is not present. If you catch this for =
each
non-mandatory field you try to access then you can handle a missing tag
there.

Does that make sense?

Best of luck,
barry


-----Original Message-----
From: Rob Kulseth [mailto:ro...@ri...]
Sent: 28 February 2003 17:59
To: Qui...@li...
Subject: [Quickfix-developers] checking for field before getting it?


is there a way to check if a field exists in a message before trying to
extract it.  For example the following code extracts FIX info into a =
data
structure.  if one of the fields I try to extract are missing, my app =
will
send a reject message.  without looking at the actual fix message =
string, I
would like to see if a field is there before I try to get it.  If a
particular field is not there, I can maybe fill it in with the correct =
data.
Any help would be appreciated.

public void Update(Fix42.SecurityStatus inMsg){
if(inMsg !=3D null)
{
	mSymbol =3D inMsg.getSymbol();
	mSecurityID =3D inMsg.getSecurityID();
	mSecurityType =3D inMsg.getSecurityType();
	mTradingSessionID =3D inMsg.getTradingSessionID();
	mUnsolicitedUndicator =3D inMsg.getUnsolicitedIndicator();
	mSecurityTradingstatus =3D inMsg.getSecurityTradingStatus();
	//mTransactTime =3D inMsg.getTransactTime();
	//mSecurityExchange =3D inMsg.getSecurityExchange();
	//mSecurityDesc =3D inMsg.getSecurityDesc();
	switch(mSecurityType.getValue())
	{
		case "OPT":
			mMaturityMonthYear =3D inMsg.getMaturityMonthYear();
			mMaturityDay =3D inMsg.getMaturityDay();
			mPutOrCall =3D inMsg.getPutOrCall();
			mStrikePrice =3D inMsg.getStrikePrice();
		break;
		case "FUT":
			mMaturityMonthYear =3D inMsg.getMaturityMonthYear();
			mMaturityDay =3D inMsg.getMaturityDay();
			break;
		}
	}=09
}


-------------------------------------------------------
This sf.net email is sponsored by:ThinkGeek
Welcome to geek heaven.
http://thinkgeek.com/sf
_______________________________________________
Quickfix-developers mailing list
Qui...@li...
https://lists.sourceforge.net/lists/listinfo/quickfix-developers