FHIR Chat · Get referenced resource · implementers

Stream: implementers

Topic: Get referenced resource

Patricia Alves (May 17 2017 at 11:38):

Hi, sorry for my noob question, but I can't understand, in the new STU3 API, how to get a Resource referenced by the elements in the List<Reference> returned by Composition.SectionComponent.getEntry() .
(see http://hapifhir.io/apidocs-dstu3/org/hl7/fhir/dstu3/model/Composition.SectionComponent.html).

Thanks in advance!

Lloyd McKenzie (May 17 2017 at 15:34):

Can you explain your question further? Are you trying to retrive them with a query? Use one of the reference implementations?

Patricia Alves (May 17 2017 at 15:54):

I'm using HAPI FHIR STU3 and I'm trying to build the code to get a Resource referenced by the elements in the List<Reference> returned by Composition.SectionComponent.getEntry(). For example:

Suppose I have this code:

. . .

var composition = docBundle.getEntryFirstRep().getResource();
var sections = composition.getSection();
var entries0 = sections.get(0).getEntry(); //entries in composition section 0

for (var e = 0; e < entries0.size(); e++) {

   if (entries0.get(e).getReference().equals("List/g1")) {
          var organizations = entries0.get(e).getResource().getEntry(); 
  }
}

. . .

"List/g1" is a ListResource that has 5 items in the entry array that reference an Organization.

I want to get the content of the referenced Organization resources. I tried this, but it returns"null":
. . .

 organizations.get(i).getItemTarget();

. . .

UPDATE: can I send you an attachment with the message and code I'm trying to validate?

Lloyd McKenzie (May 17 2017 at 16:36):

@James Agnew ?

James Agnew (May 18 2017 at 10:07):

The getFooTarget() methods don't do anything in HAPI. @Grahame Grieve do you use these at all? If not, we should remove them because they tend to confuse people. There is a corresponding field in Reference so I believe they are ust a duplicate.

Patricia, I'm still not totaly clear what you're trying to do. overall.. but assuming you have fetched a composition from a server and now want to discover what resources are in a list in that composition, you want to be calling getItem() instead of getItemTarget() and using the methods on that.

Patricia Alves (May 18 2017 at 10:17):

Thank you James! So I can call getItem().getResource() to the get the referenced Resource. getItemTarget() really confused me. Thanks for your help! Please ignore the other topic I posted (ListResource.ListEntryComponent.getItemTarget() not working), I can't delete it.

Grahame Grieve (May 18 2017 at 10:19):

@James Agnew they're not quite just a duplicate because the one in reference is not typed. I had originally used the one in the reference, but moved it out to a sibling to get typed references where appropriate

Grahame Grieve (May 18 2017 at 10:20):

but I don't think I use them much - could use the one on reference.... just have to type cast more

Last updated: Apr 12 2022 at 19:14 UTC