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AbstractResourceProvider.java
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AbstractResourceProvider.java
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package dev.dsf.bpe.v1.service;
import static org.hl7.fhir.instance.model.api.IBaseBundle.LINK_NEXT;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.function.Predicate;
import org.hl7.fhir.r4.model.Bundle;
import org.hl7.fhir.r4.model.Bundle.BundleEntryComponent;
import org.hl7.fhir.r4.model.Bundle.SearchEntryMode;
import org.hl7.fhir.r4.model.Coding;
import org.hl7.fhir.r4.model.Identifier;
import org.hl7.fhir.r4.model.Resource;
import org.springframework.beans.factory.InitializingBean;
public abstract class AbstractResourceProvider implements InitializingBean
{
protected final FhirWebserviceClientProvider clientProvider;
protected final String localEndpointAddress;
public AbstractResourceProvider(FhirWebserviceClientProvider clientProvider, String localEndpointAddress)
{
this.clientProvider = clientProvider;
this.localEndpointAddress = localEndpointAddress;
}
@Override
public void afterPropertiesSet() throws Exception
{
Objects.requireNonNull(clientProvider, "clientProvider");
Objects.requireNonNull(localEndpointAddress, "localEndpointAddress");
}
protected final String toSearchParameter(Identifier identifier)
{
return (identifier.hasSystem() ? identifier.getSystem() + "|" : "") + identifier.getValue();
}
protected final String toSearchParameter(Coding coding)
{
return (coding.hasSystem() ? coding.getSystem() + "|" : "") + coding.getCode();
}
protected final <R extends Resource> List<R> search(Class<? extends Resource> searchType,
Map<String, List<String>> searchParameters, SearchEntryMode targetMode, Class<R> targetType,
Predicate<R> filter)
{
List<R> organizations = new ArrayList<>();
boolean hasMore = true;
int page = 1;
while (hasMore)
{
Bundle resultBundle = search(searchType, searchParameters, page++);
organizations.addAll(resultBundle.getEntry().stream().filter(BundleEntryComponent::hasSearch)
.filter(e -> targetMode.equals(e.getSearch().getMode())).filter(BundleEntryComponent::hasResource)
.map(BundleEntryComponent::getResource).filter(targetType::isInstance).map(targetType::cast)
.filter(filter).toList());
hasMore = resultBundle.getLink(LINK_NEXT) != null;
}
return organizations;
}
private Bundle search(Class<? extends Resource> searchType, Map<String, List<String>> parameters, int page)
{
Map<String, List<String>> parametersAndPage = new HashMap<>(parameters);
parametersAndPage.put("_page", Collections.singletonList(String.valueOf(page)));
if (!parameters.containsKey("_sort"))
parametersAndPage.put("_sort", Collections.singletonList("_id"));
return clientProvider.getLocalWebserviceClient().searchWithStrictHandling(searchType, parametersAndPage);
}
}