FHIR Chat · How to dynamically specify client search criteria? · implementers

Stream: implementers

Topic: How to dynamically specify client search criteria?

Volker Wick (Aug 20 2020 at 14:29):

Moved to #hapi stream

I am implementing a FHIR server where I need to delegate a patient search query to another server backend. The server function that implements this search is called with three parameters family, given (both StringParam) and a birthday (DateParam)

My delegation code I have envisioned looks something like this ...

return fhirContext.newRestfulGenericClient(backendInstance)
    .search()
    .forResource(Patient.class)
    .where(criteria)   // ??? can't use .where(Patient.FAMILY.matches().value(family.getValue()))
    .execute();

However, I am not sure about how to fill the criteria parameter. Depending on whether family, given and birthday are present, criteria should be set accordingly. (That's why I can't use Patient.FAMILY.matches() ... or other similar functions here)

I did not get very far with the implementation of where() that accepts an ICriterion<...> object and was considering the alternative where() that takes a Map<String, List<IQueryParameterType>>

Here is the code that sets up the criteria HashMap as I would guess how it might work. Unfortunately I am probably missing something as my code does not yield any results (unless my search criteria are all empty):

    // family is a StringParam
    Map<String, List<IQueryParameterType>> criteria = new HashMap<>();
    if (family != null && !family.isEmpty()) {
        criteria.put("family",  Arrays.asList(family));
    }

Can somebody point me in the right direction or post a documentation link that clears this up?
Thanks in advance,
Volker

Michele Mottini (Aug 20 2020 at 14:47):

Is this about HAPI? Or some other server? There is a #hapi stream

Volker Wick (Aug 21 2020 at 04:55):

Yes, it is about hapi. I was not aware of the hapi Stream and will move my question. Thanks

Last updated: Apr 12 2022 at 19:14 UTC