Added OpenAPI / Swagger option

src/main/java/ca/uhn/fhir/jpa/starter/AppProperties.java

@@ -22,6 +22,7 @@ import java.util.Objects;
 public class AppProperties {
 
   private Boolean cql_enabled = false;
+  private Boolean openapi_enabled = false;
   private Boolean mdm_enabled = false;
   private Boolean allow_cascading_deletes = false;
   private Boolean allow_contains_searches = true;
@@ -75,6 +76,14 @@ public class AppProperties {
   private Boolean use_apache_address_strategy = false;
   private Boolean use_apache_address_strategy_https = false;
 
+	public Boolean getOpenapi_enabled() {
+		return openapi_enabled;
+	}
+
+	public void setOpenapi_enabled(Boolean openapi_enabled) {
+		this.openapi_enabled = openapi_enabled;
+	}
+
 	public Boolean getUse_apache_address_strategy() {
     return use_apache_address_strategy;
   }

src/main/java/ca/uhn/fhir/jpa/starter/BaseJpaRestfulServer.java

@@ -28,6 +28,7 @@ import ca.uhn.fhir.mdm.provider.MdmProviderLoader;
 import ca.uhn.fhir.narrative.DefaultThymeleafNarrativeGenerator;
 import ca.uhn.fhir.narrative.INarrativeGenerator;
 import ca.uhn.fhir.narrative2.NullNarrativeGenerator;
+import ca.uhn.fhir.rest.openapi.OpenApiInterceptor;
 import ca.uhn.fhir.rest.server.ApacheProxyAddressStrategy;
 import ca.uhn.fhir.rest.server.ETagSupportEnum;
 import ca.uhn.fhir.rest.server.HardcodedServerAddressStrategy;
@@ -357,6 +358,10 @@ public class BaseJpaRestfulServer extends RestfulServer {
 
     daoConfig.setDeferIndexingForCodesystemsOfSize(appProperties.getDefer_indexing_for_codesystems_of_size());
 
+	 if (appProperties.getOpenapi_enabled()) {
+		registerInterceptor(new OpenApiInterceptor());
+	}
+
     // Bulk Export
     if (appProperties.getBulk_export_enabled()) {
       registerProvider(bulkDataExportProvider);

src/main/resources/application.yaml

@@ -36,6 +36,8 @@ spring:
     allow-bean-definition-overriding: true
 hapi:
   fhir:
+    ### This enables the swagger-ui at /fhir/swagger-ui/index.html as well as the /fhir/api-docs (see https://hapifhir.io/hapi-fhir/docs/server_plain/openapi.html)
+    openapi_enabled: true
     ### This is the FHIR version. Choose between, DSTU2, DSTU3, R4 or R5
     fhir_version: R4
 ### enable to use the ApacheProxyAddressStrategy which uses X-Forwarded-* headers