Wombat.MamaMsg.getField C# (CSharp) Method

        public MamaMsgField getField(
			string name,
			ushort fid,
			MamaMsgField valueIfMissing)
        {
            if (mField == null)
            {
                mField = new MamaMsgField ();
                mField.SelfManageLifeTime(false);
            }
            if (tryField (name, fid, ref mField))
                return mField;
            else
                return valueIfMissing;
        }

        private void updateOrderImbalanceFields(
			MamdaSubscription	subscription,
			MamaMsg				msg,
			mamaMsgType			msgType)
		{
			string securityStatus = null;
			lock (this)
			{
				MamaMsgField msgField = null;
	            
				/*The wSecStatusQual will not always be in the message 
				so you need to account for this by checking for it.
				*/
				try
				{
					msgField = msg.getField(MamdaOrderImbalanceFields.SECURITY_STATUS_QUAL, null);
				}
				catch (MamdaDataException ex)
				{
					throw new MamaException(MamaStatus.mamaStatus.MAMA_STATUS_PLATFORM, ex.Message);
				}
				if (msgField == null) //does not exist
					return;

				securityStatus = msgField.getString();

				if (isImbalanceType(securityStatus))
				{
					clearCache(mOrderImbalanceCache);
				}
				msg.iterateFields(mFieldIterator, null,null);
			}

			switch (msgType)
			{
				case mamaMsgType.MAMA_MSG_TYPE_INITIAL:
				case mamaMsgType.MAMA_MSG_TYPE_RECAP:
					handleRecap(subscription, msg);
					break;
				case mamaMsgType.MAMA_MSG_TYPE_UPDATE:
				{
					int value = 0;
					if (securityStatus != null)
					{
						value = MamdaOrderImbalanceType.stringToValue(securityStatus);
						if (MamdaOrderImbalanceType.isMamdaImbalanceOrder(value))
						{
							handleOrderImbalance(subscription,msg); 
						}
						else
						{
							handleNoOrderImbalance(subscription, msg); 
						}
					}
				}
				break;
			default:
				break;
			}
	        
		}