This is the kind of code we have been using for that purpose:
try
{
_PID = new HL7PID((PID)Msg.get("PID"));
}
catch (HL7Exception E) { }
try
{
Segment segment = (Segment)Msg.get("PV1");
if (segment != null)
_PV = new HL7PV((PV1)segment,
(PV2)Msg.get("PV2"));
}
catch (HL7Exception E) { }
try
{
Structure[] Structs = Msg.getAll("DG1");
if (Structs != null && Structs.length > 0)
{
_DG1 = new HL7DG1[Structs.length];
for (int i = 0; i < Structs.length; ++i)
_DG1[i] = new HL7DG1((DG1)Structs[i]);
}
}
catch (HL7Exception E) { }
We do a few things:
- We have our own structures to capture the elements of a
particular message we care about (here, HL7PID, HL7DG1 etc.)
- We have try-catch blocks because HAPI can throw an exception if
the segment doesn't exist.
This has been working ok for us.
___________________________________________________________
Laurent Hasson
Co-Founder and CTO
360Fresh Inc.
cell: 646.283.2186
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-----Original Message-----
From: Christian Ohr [mailto:[email protected]]
Sent: Thursday, January 10, 2013 2:58 AM
To: steven touw
Cc: [email protected]
Subject: Re: [HAPI-devel] reading HL7 generically
Forgot to mention that you currently still need to include the
hapi-structure jar(s) in your classpath, depending on the HL7
version(s) you expect. You can also use the CanonicalModelClassFactory with
your parser, then you only need the latest structure jar.
In HAPI 2.1 (not released yet), you will be able to omit the structure jars
completely.
Christian
2013/1/10 Christian Ohr < <mailto:[email protected]>
[email protected]>:
> In general, you don't have to cast to a specific message structure
> class: the parser returns a Message object, and you can obtain
> segments using message.get("segment-name") , and from a Segment you
> can obtain a field using segment.getField(field-number). If that's not
> generic enough, take a look at ca.uhn.hl7v2.preparser.PreParser.
>
> cheers
> Christian
>
> 2013/1/9 steven touw < <mailto:[email protected]> [email protected]>:
>> Hello,
>> I am new to HL7 as well as it's contents. I hope this question isn't
>> too stupid.
>> I'm trying to read from messages generically - is there any way to
>> grab particular segments without having to cast the Message object
>> into ADT_A05 for example? I could have various ADT_* and trying to
>> find the best way to do this...
>>
>> Thanks,
>> Steve
>>
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