fix: JsonView annotation ignored for subclasses

Forward JsonView annotation when resolving subtypes.

Refs: #4239

Author: devopsix

modules/swagger-core/src/main/java/io/swagger/v3/core/jackson/ModelResolver.java

@@ -742,7 +742,7 @@ public Schema resolve(AnnotatedType annotatedType, ModelConverterContext context
          * This must be done after model.setProperties so that the model's set
          * of properties is available to filter from any subtypes
          **/
-        if (!resolveSubtypes(model, beanDesc, context)) {
+        if (!resolveSubtypes(model, beanDesc, context, annotatedType.getJsonViewAnnotation())) {
             model.setDiscriminator(null);
         }
 
@@ -1370,7 +1370,7 @@ protected void applyBeanValidatorAnnotations(Schema property, Annotation[] annot
         }
     }
 
-    private boolean resolveSubtypes(Schema model, BeanDescription bean, ModelConverterContext context) {
+    private boolean resolveSubtypes(Schema model, BeanDescription bean, ModelConverterContext context, JsonView jsonViewAnnotation) {
         final List<NamedType> types = _intr.findSubtypes(bean.getClassInfo());
         if (types == null) {
             return false;
@@ -1398,7 +1398,8 @@ private boolean resolveSubtypes(Schema model, BeanDescription bean, ModelConvert
                 continue;
             }
 
-            final Schema subtypeModel = context.resolve(new AnnotatedType().type(subtypeType));
+            final Schema subtypeModel = context.resolve(new AnnotatedType().type(subtypeType)
+                .jsonViewAnnotation(jsonViewAnnotation));
 
             if (    StringUtils.isBlank(subtypeModel.getName()) ||
                     subtypeModel.getName().equals(model.getName())) {

modules/swagger-core/src/test/java/io/swagger/v3/core/resolving/Ticket4239Test.java

@@ -0,0 +1,75 @@
+package io.swagger.v3.core.resolving;
+
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonView;
+import io.swagger.v3.core.converter.AnnotatedType;
+import io.swagger.v3.core.converter.ModelConverterContextImpl;
+import io.swagger.v3.core.jackson.ModelResolver;
+import io.swagger.v3.core.matchers.SerializationMatchers;
+import org.testng.annotations.Test;
+
+import java.lang.annotation.Annotation;
+
+import static com.fasterxml.jackson.annotation.JsonTypeInfo.Id.NAME;
+
+public class Ticket4239Test extends SwaggerTestBase {
+
+    public interface Input {}
+
+    public interface Output {}
+
+    @JsonTypeInfo(use = NAME)
+    @JsonSubTypes({
+        @JsonSubTypes.Type(value = A1.class),
+    })
+    public static abstract class A {
+        @JsonView(Input.class)
+        public String a_in;
+        @JsonView(Output.class)
+        public String a_out;
+    }
+
+    public static class A1 extends A {
+        @JsonView(Input.class)
+        public String a1_in;
+        @JsonView(Output.class)
+        public String a1_out;
+    }
+
+    private static final JsonView VIEW_OUTPUT = new JsonView() {
+        public Class<? extends Annotation> annotationType() {
+            return JsonView.class;
+        }
+        public Class<?>[] value() {
+            return new Class[] {Output.class};
+        }
+    };
+
+    @Test
+    public void testJsonValueSchemaAnnotation() {
+
+        final ModelResolver modelResolver = new ModelResolver(mapper());
+
+        ModelConverterContextImpl context = new ModelConverterContextImpl(modelResolver);
+
+        AnnotatedType type = new AnnotatedType(Ticket4239Test.A.class).jsonViewAnnotation(VIEW_OUTPUT);
+
+        context.resolve(type);
+
+        SerializationMatchers.assertEqualsToYaml(context.getDefinedModels(), "A1_Output:\n" +
+            "  type: object\n" +
+            "  allOf:\n" +
+            "  - $ref: '#/components/schemas/A_Output'\n" +
+            "  - type: object\n" +
+            "    properties:\n" +
+            "      a1_out:\n" +
+            "        type: string\n" +
+            "A_Output:\n" +
+            "  type: object\n" +
+            "  properties:\n" +
+            "    a_out:\n" +
+            "      type: string\n");
+
+    }
+}