RE: [HAPI-devel] How to use XML-binding to generate library class es for hapi parser?

[Tripp, B. <Bry...@uh...>]

Hi Iouri, 

No, we don't have that.  We do have a tool that generates Java classes from
HL7 conformance profiles.  These aren't message classes, but wrappers that
further constrain underlying message classes to agree with the profile.  But
depending on how you want to use it this might work just as well for you.  

I should also point out that HAPI handles unexpected segments and fields
automatically, so normally you don't need to make corresponding custom
classes (although it does make some things more convenient).   

Also, the message classes are normally generated from the HL7 database, so
if you have access to that, it's just a matter of adding some entries to it.
I guess you could also make your own database with the same structure, if
you didn't have the standard one and wanted to make a lot of custom message
classes.  

Are any of the above satisfactory?  

Bryan 

-----Original Message-----
From: Iouri Leonov
To: hl7...@li...
Sent: 12/07/2004 2:17 PM
Subject: [HAPI-devel] How to use XML-binding to generate library classes for
hapi parser?

Good day developers.

Recently I've started playing with hapi framework. I have a question
relating to configuration of messages.

Let' say we have a very common scenario - a user wants his custom
segment
ZUSER with some custom datatype MY_DT. I see the only way to do it -
make
new Java files. I have to create a new ZUSER.java in  segment package
and a
new MY_DT.java in datatype package. Then I have to go to message package
and
change message ADT_x.java file in order to make it work with these new
segment and datatype. Job that definitely requires skills of a Java
programmer.

My question relates to ways of descriptive programming. Is there a way
in
the current hapi implementations to describe the content of my new
segment
and datatype not in .java file but rather in some XML file or in w3 XML
Schema file then run that xml instance through a binding parser which
will
generate classes ZUSER.class and MY_DT.class which can be used directly
by
Pipe parser? Something in line with JAXB - XML binding.  If there is a
way,
then how to do it, if there's none - any idea how to make it  happen?

Cheers,

Iouri Leonov
XML Developer



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