Hi Ian,
The cleaner alternative, which was just added in HAPI 2.1 oddly enough is
as follows:
if (!hl7Message.getINSURANCE(0).getIN1().isEmpty()) {
.. blah ..
}
There is also the somewhat uglier alternative which would work in older
releases:
if (!hl7Message.getINSURANCE(0).getAll("IN1").length == 0) {
.. blah ..
}
It's worth noting that these two techniques are not 100% semantically
equivalent. In the case of a message containing an empty IN1 segment (in
other words, you parsed a message that contained an IN1 segment, but that
segment had no field values), the second "blah" would get triggered but the
first one wouldn't.
Cheers,
James
On Tue, Jul 2, 2013 at 7:51 PM, Ian Vowles <ian_vow...@health.qld.gov.au>wrote:
> When building a transform of an HL7 message where some segment is
> optional, but if it is present lots of fields are to be checked and
> transformed, I like to check for existence of the segment first.
>
> Using HAPI I code the check like this:
>
> if
> (!("IN1".equals(hl7Message.getINSURANCE(0).getIN1().encode()))) {
> hl7In1 = hl7Message.getINSURANCE(0).getIN1();
> .
> .
> Do the get/set/change of various fields of the hl7In1
> .
> .
> }
>
> Is this a good way to check if it's there? It has never looked quite
> right to me, but I haven't figured out another way.
>
> Thanks
> Ian
>
>
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