[HAPI-devel] Re: Parse: Want PID-3 String Value from SIU packet

[<twh...@th...>]

James, 

Yes, the structuring and path def make perfect sense - thanks for the info.  
My bad for not digging deeper before I posted. 

You wrote:
"To access the PID segment, use notation like:
terser.get("/SIU_S12_PIDPV1PV2OBXDG1/PID-3");" 

Is this returning a Segment object, or the string value one of the segment's 
fields?  Seems like the latter. 

What I really need help with is how do I get the string value either using 
terser or not. 

However, seemingly no combination of path information returns anything but 
null. 

PipeParser parser = new PipeParser();
Message message = parser.parse(sMessage);
Terser terser = new Terser(message);
String sMRN = terser.get("/SIU_S12_PIDPV1PV2OBXDG1/PID-3"); 

sMRN is always null; 


Beyond that, I tried all combinations of using Groups, PIDs, CXs, etc and 
still seem to come up empty handed - even if I had figured that out, it 
seems to be alot of jumping thru hoops to get a simple string value so I'll 
assume it's the wrong direction. 

Again, thanks in advance for your help, 

Tom 

James Wrote--------- 

Hi Tom, 

The SIU_S12_.. structure is actually a segment group. Chapter 3 of the HL7
spec defines the SIU messages as containing the following structure:
[ { PID [PD1] [PV1] [PV2] [{OBX}] [{DG1}] } ]
which basically means that the entire chunk of segments is optional (as
indicated by the surrounding [ ]) and can repeat as a group (as indicated by
the surrounding { }). 

To access the PID segment, use notation like:
terser.get("/SIU_S12_PIDPV1PV2OBXDG1/PID-3"); 

This long name actually maps to a HAPI class by the same name. 

Does this make sense? 

Cheers,
James Agnew