SimpleWorkerContext in android environment does not load the dependencies of a npm FHIR package built for an IG

[joiskash]

We are currently using hapi version 5.6.36 .

We are using the SimpleWorkerContext to load the npm package. The npm package currently has the Resources for the specific implementation guide without any of the core Resources.

Is the SimpleWorkerContext expected to load the dependencies ? if yes how is this provided?

If not, what is the suggested way to implement IWorkerContext / Extend SimpleWorkerContext to make sure that the dependencies are loaded too.

This is how we are loading the npm package in android for the implementation guide.

val immunizationIg =
        "content/general/who-eir/packages/package.r4.tgz"

 val contextR4 =
        SimpleWorkerContext.fromPackage(
          NpmPackage.fromPackage(
            File(
              ClassLoader.getSystemResource(immunizationIg).file
            ).inputStream()),true).apply {
          setExpansionProfile(Parameters())
          isCanRunWithoutTerminology = true
        }

//We then use this context in the TransformSupportServices and StructureMapUtilities class

val transformSupportServices =
      TransformSupportServicesMatchBox(
        contextR4,
        outputs
      )
val structureMapUtilities =
        org.hl7.fhir.r4.utils.StructureMapUtilities(contextR4, transformSupportServices)

Any transformation that involves a target that is a FHIR resrouce from base fhir core r4 and whose StructureDefinition is missing from the package.r4.tgz from the npm package of the specific IG throws an error.
We copied all the files from the home/.fhir/packages/hl7.fhir.r4.core#4.0.1/package/ into the package.r4 folder , compressed it and used it as above. The transformation then passed.

[joiskash]

package org.smartregister.fhircore.engine.util.helper;

import org.hl7.fhir.exceptions.FHIRException;
import org.hl7.fhir.r4.context.IWorkerContext;
import org.hl7.fhir.r4.context.SimpleWorkerContext;
import org.hl7.fhir.utilities.npm.NpmPackage;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;

public class ComplexWorkerContext extends SimpleWorkerContext {
    public ComplexWorkerContext() throws FileNotFoundException, IOException, FHIRException {

    }
    public void loadFromMultiplePackages(ArrayList<NpmPackage> packages, Boolean allowDuplicates) throws IOException {
        this.setAllowLoadingDuplicates(allowDuplicates);
        for (int i=0;i<packages.size();i++){
            this.loadFromPackage(packages.get(i),null);
        }
    }
}

Is this a good pattern? Seems to work

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 5 days if no further activity occurs. Thank you for your contributions.