Add test for #3890 (#3891)

* Add test for #3890

* Remove unneeded import

* Add changelog

hapi-fhir-base/src/main/java/ca/uhn/fhir/parser/JsonParser.java

@@ -1379,6 +1379,10 @@ public class JsonParser extends BaseParser implements IJsonLikeParser {
 		}
 	}
 
+	private static void write(JsonLikeWriter theWriter, String theName, String theValue) throws IOException {
+		theWriter.write(theName, theValue);
+	}
+
 	private class HeldExtension implements Comparable<HeldExtension> {
 
 		private CompositeChildElement myChildElem;
@@ -1562,8 +1566,4 @@ public class JsonParser extends BaseParser implements IJsonLikeParser {
 			theEventWriter.endObject();
 		}
 	}
-
-	private static void write(JsonLikeWriter theWriter, String theName, String theValue) throws IOException {
-		theWriter.write(theName, theValue);
-	}
 }

hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/6_2_0/3890-serialize-refobj.yaml

@@ -0,0 +1,6 @@
+---
+type: fix
+issue: 3890
+title: "When serializing references where the reference target has been instantiated using a resource object and
+  not a reference string, the serialization was omitted when the reference appeared in the resource
+  metadata section. This has been corrected."

hapi-fhir-structures-r4/src/test/java/ca/uhn/fhir/parser/JsonParserR4Test.java

@@ -14,6 +14,7 @@ import org.apache.commons.io.IOUtils;
 import org.apache.commons.io.output.NullWriter;
 import org.apache.commons.lang.StringUtils;
 import org.hl7.fhir.instance.model.api.IBaseResource;
+import org.hl7.fhir.r4.model.Appointment;
 import org.hl7.fhir.r4.model.AuditEvent;
 import org.hl7.fhir.r4.model.Basic;
 import org.hl7.fhir.r4.model.Binary;
@@ -28,8 +29,10 @@ import org.hl7.fhir.r4.model.Medication;
 import org.hl7.fhir.r4.model.MedicationDispense;
 import org.hl7.fhir.r4.model.MedicationRequest;
 import org.hl7.fhir.r4.model.MessageHeader;
+import org.hl7.fhir.r4.model.Meta;
 import org.hl7.fhir.r4.model.Narrative;
 import org.hl7.fhir.r4.model.Observation;
+import org.hl7.fhir.r4.model.Organization;
 import org.hl7.fhir.r4.model.Patient;
 import org.hl7.fhir.r4.model.Practitioner;
 import org.hl7.fhir.r4.model.PrimitiveType;
@@ -67,6 +70,8 @@ import static org.hamcrest.Matchers.stringContainsInOrder;
 import static org.hamcrest.core.IsNot.not;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
 public class JsonParserR4Test extends BaseTest {
@@ -736,6 +741,31 @@ public class JsonParserR4Test extends BaseTest {
 
 	}
 
+	/**
+	 * See #3890
+	 */
+	@Test
+	public void testEncodeExtensionWithReferenceObjectValue() {
+
+		Appointment appointment = new Appointment();
+		appointment.setId("123");
+
+		Meta meta = new Meta();
+		Extension extension = new Extension();
+		extension.setUrl("http://example-source-team.com");
+		extension.setValue(new Reference(new Organization().setId("546")));
+		meta.addExtension(extension);
+		appointment.setMeta(meta);
+
+		var parser = ourCtx.newJsonParser();
+		String output = parser.encodeResourceToString(appointment);
+		ourLog.info("Output: {}", output);
+
+		Appointment input = parser.parseResource(Appointment.class, output);
+
+		assertNotNull(input.getMeta().getExtensionByUrl("http://example-source-team.com"));
+	}
+
 	@Test
 	public void testParseExtensionWithUriValue_BuiltInStructure() {
 		String input = "{\n" +

hapi-fhir-structures-r4/src/test/java/ca/uhn/fhir/parser/XmlParserR4Test.java

@@ -5,19 +5,25 @@ import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.stringContainsInOrder;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
 
 import java.io.IOException;
 import java.net.URL;
 
+import org.hl7.fhir.r4.model.Appointment;
 import org.hl7.fhir.r4.model.AuditEvent;
 import org.hl7.fhir.r4.model.Bundle;
 import org.hl7.fhir.r4.model.Composition;
 import org.hl7.fhir.r4.model.DocumentReference;
+import org.hl7.fhir.r4.model.Extension;
 import org.hl7.fhir.r4.model.MessageHeader;
+import org.hl7.fhir.r4.model.Meta;
 import org.hl7.fhir.r4.model.Narrative;
 import org.hl7.fhir.r4.model.Observation;
+import org.hl7.fhir.r4.model.Organization;
 import org.hl7.fhir.r4.model.Parameters;
 import org.hl7.fhir.r4.model.Patient;
+import org.hl7.fhir.r4.model.Reference;
 import org.junit.jupiter.api.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -45,6 +51,32 @@ public class XmlParserR4Test extends BaseTest {
 	}
 
 
+	/**
+	 * See #3890
+	 */
+	@Test
+	public void testEncodeExtensionWithReferenceObjectValue() {
+
+		Appointment appointment = new Appointment();
+		appointment.setId("123");
+
+		Meta meta = new Meta();
+		Extension extension = new Extension();
+		extension.setUrl("http://example-source-team.com");
+		extension.setValue(new Reference(new Organization().setId("546")));
+		meta.addExtension(extension);
+		appointment.setMeta(meta);
+
+		var parser = ourCtx.newXmlParser();
+		String output = parser.encodeResourceToString(appointment);
+		ourLog.info("Output: {}", output);
+
+		Appointment input = parser.parseResource(Appointment.class, output);
+
+		assertNotNull(input.getMeta().getExtensionByUrl("http://example-source-team.com"));
+	}
+
+
 	/**
 	 * Ensure that a contained bundle doesn't cause a crash
 	 */

pom.xml

@@ -767,7 +767,7 @@
 
     <properties>
 
-        <fhir_core_version>5.6.54</fhir_core_version>
+        <fhir_core_version>5.6.55-SNAPSHOT</fhir_core_version>
         <ucum_version>1.0.3</ucum_version>
 
         <surefire_jvm_args>-Dfile.encoding=UTF-8 -Xmx2048m</surefire_jvm_args>