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

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Hi Iouri, 

Oops, sorry about that.  It looks like we have to fix something.  Let me
take a look at it tonight and get back to you.  

Bryan 

-----Original Message-----
From: Iouri Leonov
To: Tripp, Bryan
Cc: hl7...@li...
Sent: 14/07/2004 12:00 PM
Subject: RE: [HAPI-devel] How to use XML-binding to generate library class
es for hapi parser?

Hi Bryan,

I am trying your idea of making hapi-compliant classes
from an xml version of a conformance profile made by a
Messaging Workbench. So I created IVLTest.mwb with
standard A01 message with a twist - a custom ZVL
segment. Then I created IVLTest.xml which among other
things has a tag describing that ZVL custom segment.
Next step - create classes using CongGen classes
generator bundled in hapi-0.4.2.jar. Classes generator
runs fine till it hits reference in A01 to my custom
ZVL segment. This is what I am getting in the output:

Generating Primitive:
com.iouri.parser.generated.DG1children.DiagnosingClinician
children.CompDegreeEgMD
Generating Primitive:
com.iouri.parser.generated.DG1children.DiagnosingClinician
children.CompSourceTableId
Generating Segment: com.iouri.parser.generated.SegDG1
ConformanceError:
ca.uhn.hl7v2.conf.classes.exceptions.ConformanceError:
Underlying HAPI class "ca
.uhn.hl7v2.model.v22.message.ADT_A01" does not have
accessor "getZVL()". This is probably a bug.

Done.

Hm!? I am wondering why it's happening. Are my
settings are somehow wrong or classes generator has
its own mind towards custom segments (he doesn't like
the name of the segment I came up with ;)?   Should
you have five minutes to spare, may I ask you to have
a look inside testPackage.zip where I put files
mentioned in this message.

Cheers,

Iouri

--- "Tripp, Bryan" <Bry...@uh...> wrote:
> Hi Iouri,
> 
> The instructions for making conformance classes are
> here:
> http://hl7api.sourceforge.net/conf/compiler.html 
> Conformance profiles are
> normally written with the Messaging Workbench.  Once
> you have one, you can
> use the HAPI tool to make corresponding classes.  
> 
> Alexei's suggestion is good though.  If you go ahead
> with that, conformance
> profiles would also be a good source for these
> transforms.  
> 
> HAPI uses the HL7 database to generate the code that
> you download in the
> source_vXX.zip files, i.e. most of what is under
> ca.uhn.hl7v2.model.vXX.  If
> you have this database it's very easy to make the
> classes (run the generate
> and compile-gen Ant tasks).  It's an access DB, and
> it comes with forms for
> adding segments, etc.  The problem is that it is
> expensive, so not many
> people have it.  It's for sale at
> https://www.hl7.org/library/bookstore/  
> 
> If there is interest, I'll ask the database creator
> (Frank Oemig) whether we
> could distribute an empty DB with the same structure
> for free.  I don't know
> if the structure is considered intellectual property
> or just the contents.  
> 
> Bryan 
> 
> > -----Original Message-----
> > From: Iouri Leonov [mailto:iou...@ya...]
> > Sent: July 13, 2004 1:23 AM
> > To: hl7...@li...
> > Subject: RE: [HAPI-devel] How to use XML-binding
> to generate library
> > class es for hapi parser?
> > 
> > 
> > Hi Bryan,
> > 
> > Thank you for your prompt and informative reply.
> > 
> > Regarding the tool for generating Java classes
> from
> > HL7 conformance profiles. I am wondering  what
> tool is
> > that? Is it available? Where could I see some docs
> to
> > figure out how to handle the tool?  Is that tool
> > somehow related to WHA Office of Information
> Messaging
> > Workbench?
> > 
> > The same 'how-to'  song with  HL7 database. You 
> said
> > that 'the message classes are normally generated
> from
> > the HL7 database'. Do those classes relate somehow
> to
> > classes in ca.uhn.hl7v2.model.vxx.message package?
> > Well, I am very green both with hapi framework and
> > with HL7 in general. Hence I do not have much of
> an
> > idea about that database schema nor about
> > tools/techniques for generating from HL7 database
> > records hapi-compliant Java classes (messages,
> > segments, datatypes).  Is there a way to provide
> me
> > with a link to info about this 'database HL7
> record -
> > Java class' technique.
> > 
> > Thanks again Bryan,
> > 
> > Cheers,
> > 
> > Iouri
> > 
> > 
> > --- "Tripp, Bryan" <Bry...@uh...> wrote:
> > > 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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> Briefings &
> > > Training.
> > > Attend Black Hat Briefings & Training, Las Vegas
> > > July 24-29 - 
> 
=== message truncated ===

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