Don't evaluate Extensions when determining type of answer

hapi-fhir-validation/pom.xml

@@ -11,7 +11,7 @@
 
 	<artifactId>hapi-fhir-validation</artifactId>
 	<packaging>bundle</packaging>
-	<version>3.6.2-PHRFIX</version>
+	<version>3.6.3-PHRFIX</version>
 
 	<name>HAPI FHIR - Validation</name>
 

hapi-fhir-validation/src/main/java/org/hl7/fhir/r4/validation/DefaultEnableWhenEvaluator.java

@@ -65,11 +65,33 @@ public class DefaultEnableWhenEvaluator implements IEnableWhenEvaluator {
                 .anyMatch(answer -> evaluateAnswer(answer, enableCondition.getAnswer(), enableCondition.getOperator()));            
         return new EnableWhenResult(result, linkId, enableCondition, questionnaireResponse);
     }
+    
+    public Type convertToType(Element element)  {
+        Type b = new Factory().create(element.fhirType());
+        if (b instanceof PrimitiveType) {
+          ((PrimitiveType<?>) b).setValueAsString(element.primitiveValue());
+        } else {
+          for (Element child : element.getChildren()) {
+        	  if (!isExtension(child)) {
+        		  b.setProperty(child.getName(), convertToType(child));
+        	  }
+          }
+        }
+        return b;
+      }
+
+
+	private boolean isExtension(Element element) {
+		return "Extension".equals(element.fhirType());
+	}
 
     protected boolean evaluateAnswer(Element answer, Type expectedAnswer, QuestionnaireItemOperator questionnaireItemOperator) {
         Type actualAnswer;
+        if (isExtension(answer)) {
+        	return false;
+        }
         try {
-            actualAnswer = answer.asType();
+        	actualAnswer = convertToType(answer);
         } catch (FHIRException e) {
             throw new UnprocessableEntityException("Unexpected answer type", e);
         }
@@ -81,7 +103,7 @@ public class DefaultEnableWhenEvaluator implements IEnableWhenEvaluator {
         } else if ((expectedAnswer instanceof PrimitiveType)) {
             return comparePrimitiveAnswer((PrimitiveType<?>)actualAnswer, (PrimitiveType<?>)expectedAnswer, questionnaireItemOperator);
         } else if (expectedAnswer instanceof Quantity) {
-        	return compareQuantityAnswer((Quantity)expectedAnswer, (Quantity)actualAnswer, questionnaireItemOperator);
+        	return compareQuantityAnswer((Quantity)actualAnswer, (Quantity)expectedAnswer, questionnaireItemOperator);
         }
         // TODO: Attachment, reference?
         throw new UnprocessableEntityException("Unimplemented answer type: " + expectedAnswer.getClass());
@@ -143,14 +165,9 @@ public class DefaultEnableWhenEvaluator implements IEnableWhenEvaluator {
         return item.getChildrenByName(ANSWER_ELEMENT)
                 .stream()
                 .flatMap(c -> c.getChildren().stream())
-                .filter(DefaultEnableWhenEvaluator::notExtension)
                 .collect(Collectors.toList());
     }
     
-    private static boolean notExtension(Element e) {
-    	return !Extension.class.isAssignableFrom(e.getClass());
-    }
-
     private boolean compareCodingAnswer(Coding expectedAnswer, Coding actualAnswer, QuestionnaireItemOperator questionnaireItemOperator) {
         boolean result = compareSystems(expectedAnswer, actualAnswer) && compareCodes(expectedAnswer, actualAnswer);
         if (questionnaireItemOperator == QuestionnaireItemOperator.EQUAL){

hapi-fhir-validation/src/test/java/org/hl7/fhir/dstu3/hapi/validation/QuestionnaireResponseValidatorDstu3Test.java

@@ -18,6 +18,7 @@ import org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemComponent;
 import org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemEnableWhenComponent;
 import org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemOptionComponent;
 import org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemType;
+import org.hl7.fhir.dstu3.model.QuestionnaireResponse.QuestionnaireResponseItemAnswerComponent;
 import org.hl7.fhir.dstu3.model.QuestionnaireResponse.QuestionnaireResponseItemComponent;
 import org.hl7.fhir.dstu3.model.QuestionnaireResponse.QuestionnaireResponseStatus;
 import org.junit.AfterClass;
@@ -33,6 +34,9 @@ import java.util.List;
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.hasSize;
+import static org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemType.BOOLEAN;
+import static org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemType.CHOICE;
+import static org.hl7.fhir.dstu3.model.QuestionnaireResponse.QuestionnaireResponseStatus.COMPLETED;
 import static org.junit.Assert.*;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.eq;
@@ -554,7 +558,34 @@ public class QuestionnaireResponseValidatorDstu3Test {
 				errors.getMessages().stream().filter(vm -> vm.getMessage().contains("Structural Error"))
 						.anyMatch(vm -> vm.getMessage().contains("link1")));
 	}
-
+	
+	@Test
+	public void testAnswerIsValueCodingWithExtensionInside() throws Exception {
+		Questionnaire q = new Questionnaire();
+		Coding qcoding = new Coding();
+		qcoding.setCode("1293");
+		q.addItem().setLinkId("1B").setRequired(true).setType(CHOICE).addOption().setValue(qcoding);
+		q.addItem().setLinkId("2B").setType(BOOLEAN).addEnableWhen().setQuestion("1B").setAnswer(qcoding);
+		
+		QuestionnaireResponse qr = new QuestionnaireResponse();
+		qr.setStatus(COMPLETED);
+		qr.getQuestionnaire().setReference(QUESTIONNAIRE_URL);
+		QuestionnaireResponseItemComponent qrItem = qr.addItem().setLinkId("1B");
+		Coding coding = new Coding();
+		coding.setCode("1293");
+		QuestionnaireResponseItemAnswerComponent answer = qrItem.addAnswer();
+		answer.setValue(coding);
+		coding.addExtension("http://hl7.org/fhir/StructureDefinition/questionnaire-hidden", new BooleanType(true));
+		qr.addItem().setLinkId("2B").addAnswer().setValue(new BooleanType(true));
+				
+		String reference = qr.getQuestionnaire().getReference();
+		when(myValSupport.fetchResource(any(FhirContext.class), eq(Questionnaire.class), eq(reference))).thenReturn(q);
+		
+		ValidationResult errors = myVal.validateWithResult(qr);
+		assertThat(errors.toString(), containsString("No issues"));
+		
+	}
+	
 	@Test
 	public void testEmbeddedItemInChoice() {
 		String questionnaireRef = QUESTIONNAIRE_URL;