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RE: [HAPI-devel] Detemining the Message type in Application.processMessage(...)
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From: Steve P. <st...@pr...> - 2006-01-10 22:00:02
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It looks like the MSH I have does not meet the HL7 2.2 specs? The =
message
type is in MSH-9, but there's also an int (43) in MSH-9-3...
Here's the ADT A04 sample msg I have (header only):
=20
MSH:;~\&:HBOC:A:HBOC:A:200512152351::ADT;A04;43:9007713:P:2.2:9007713::AL=
:""
:
^
^
As I understand it, field MSH-9 is a msg type, "Components: <message =
type>
^ <trigger event>", but the msg type sent is "ADT;A04;43", which is
incorrect according to the standards? In addition, there's an extra =
field
after the msg type, it's either "43" or "9007713" (depending on how the
segment is parsed), before the processing ID (P). But it seems 9007713 =
is
the sequence #, so why two of them?
=20
9 7 CM R 0076 00009 Message type=20
10 20 ST R 00010 Message control ID=20
11 1 ID R 0103 00011 Processing ID=20
12 8 ID R 0104 00012 Version ID
Any suggestions on how to deal with this? It seems a good approach to
handling messages in my Application class, when a message is sent via =
the
"processMessage(Message in)" method, is to simply do an "instance of" on =
the
msg to determine it's type, then process the msg accordingly. But with
these msgs I'm being sent "instanceof" fails, due to the MSH-9-3 field =
being
present. If I remove the MSH-9-3 field it parses properly, as an =
ADT_A04.
Here's output from parsing the original msg:
msg Name: GenericMessage$V22
=20
msg Name: ca.uhn.hl7v2.model.GenericMessage$V22
=20
msg Version: 2.2
=20
msg ?: MSH
** MSH-9-1 is: ADT
** MSH-9-2 is: A04
** MSH-9-3 is: 43
** MSH-10 is: 9007713
** MSH-11 is: P
** MSH-12 is: 2.2
** MSH-13 is: 9007713
** MSH-14 is: null
** MSH
** EVN
ca.uhn.hl7v2.HL7Exception: Can't XML-encode a GenericMessage. Message =
must
have
a recognized structure.
at ca.uhn.hl7v2.parser.XMLParser.doEncode(XMLParser.java:251)
at ca.uhn.hl7v2.parser.Parser.encode(Parser.java:221)
at ABParse.main(ABParse.java:79)
And here's output from parsing the modified msg
(MSH:;~\&:HBOC:A:HBOC:A:200512152351::ADT;A04:43:P:2.2:9007713::AL:"":)
msg Name: ADT_A04
=20
msg Name: ca.uhn.hl7v2.model.v22.message.ADT_A04
=20
msg Version: 2.2
=20
msg ?: MSH
** MSH-9-1 is: ADT
** MSH-9-2 is: A04
** MSH-9-3 is: null
** MSH-10 is: 43
** MSH-11 is: P
** MSH-12 is: 2.2
** MSH-13 is: 9007713
** MSH-14 is: null
** MSH
** EVN
** PID
** NK1
** PV1
** PV2
** OBX
** AL1
** DG1
** PR1
** GT1
** INSURANCE
** ACC
** UB1
** UB2
message is instanceof ADT_A04
<?xml version=3D"1.0"?>
<ADT_A04 xmlns=3D"urn:hl7-org:v2xml">
<MSH>
<MSH.1>:</MSH.1>
<MSH.2>;~\&</MSH.2>
<MSH.3>HBOC</MSH.3>
<MSH.4>A</MSH.4>
<MSH.5>HBOC</MSH.5>
<MSH.6>A</MSH.6>
<MSH.7>
<TS.1>200512152351</TS.1>
</MSH.7>
<MSH.9>
<CM_MSG.1>ADT</CM_MSG.1>
<CM_MSG.2>A04</CM_MSG.2>
</MSH.9>
<MSH.10>43</MSH.10>
<MSH.11>P</MSH.11>
<MSH.12>2.2</MSH.12>
<MSH.13>9007713</MSH.13>
<MSH.15>AL</MSH.15>
<MSH.16>""</MSH.16>
</MSH>
<EVN>
<EVN.1>A04</EVN.1>
<EVN.2>
<TS.1>200512152351</TS.1>
</EVN.2>
</EVN>
</ADT_A04>
=20
> -----Original Message-----
> From: hl7...@li...=20
> [mailto:hl7...@li...] On Behalf=20
> Of Bryan Tripp
> Sent: Tuesday, January 10, 2006 1:27 PM
> To: spr...@po...
> Cc: hl7...@li...
> Subject: Re: [HAPI-devel] Detemining the Message type in=20
> Application.processMessage(...)
>=20
>=20
> Hi Steve,
>=20
> The message type, event, and possibly structure should be in=20
> field MSH-9. Actually if they are there, HAPI should not use=20
> the GenericMessage class, and you should be able to tell what=20
> kind of message it is from the class. Maybe these data are=20
> missing from the message?
>=20
> Bryan
>=20
> On 1/9/06, Steve Pringle <st...@pr...> wrote:
> > Could someone please tell me how one goes about determining=20
> what type=20
> > of message has been received in the=20
> Application.processMessage(Message=20
> > in) method?
> >
> > Here's a code snippet, which is being sent an ADT_A01 msg,=20
> but I have=20
> > no idea how to determine that it is an ADT_A01. All I want=20
> to do is=20
> > determine which message type was sent, get the data I need,=20
> then send=20
> > an ACK.
> >
> > public class ABApplication implements Application
> > {
> > ...
> > public Message processMessage(Message in) throws=20
> ApplicationException
> > {
> > Message out =3D null;
> > PipeParser parser =3D new PipeParser();
> >
> > try
> > {
> > System.out.println("\nmsg Name: " +=20
> in.getName());
> > System.out.println("\nmsg Name: " +=20
> > in.getClass().getName());
> > System.out.println("\nmsg Version: " +=20
> > in.getVersion());
> > System.out.println("\nmsg ?: " +=20
> > in.get("MSH").getName());
> >
> > String[] names =3D in.getNames();
> >
> > for (int i =3D 0; i < names.length; i++)
> > System.out.println("** " +=20
> names[i]);=20
> > ...
> >
> > Here's the output:
> >
> > msg Name: GenericMessage$V22
> >
> > msg Name: ca.uhn.hl7v2.model.GenericMessage$V22
> >
> > msg Version: 2.2
> >
> > msg ?: MSH
> > ** MSH
> > ** EVN
> > ** PID
> > ** NK1
> > ** PV1
> >
> > Thanks,
> > Steve PRingle
> >
> >
> >
> >
> > -------------------------------------------------------
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>=20
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>=20
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