java.lang.Object converted to json object (map) type

Duplicate of issue: https://github.com/swagger-api/swagger-core/issues/3834, which was closed without proper resolution.

The issue referenced, still exists with version 2.2.32:

The actual behavior:

• Swagger model converter maps java.lang.Object to type: object

public class Foo {
        private Object bar;
   

    public static void main(String[] args) throws Exception {
        ResolvedSchema schema = ModelConverters.getInstance()
                .resolveAsResolvedSchema(
                        new AnnotatedType(Foo.class));

        String value = Json.mapper().writerWithDefaultPrettyPrinter().writeValueAsString(schema.schema);

        System.out.println(value);
    }
 }

prints:

{
  "type" : "object"
}

I used the version 2.2.32 and still got same result.

Start with the Foo reproduction using ModelConverters.getInstance().resolveAsResolvedSchema(new AnnotatedType(Foo.class)) and inspect the generated schema through Json.mapper(). Check the existing issue 3834 for prior context, then identify the converter behavior and add or update coverage for java.lang.Object. Done means the schema output matches the intended OpenAPI representation rather than the reported result.