Merge pull request #10526 from ignasi35/restore-jackson-visibility-de…

…faults

Restore Jackson visibility defaults

core/play-java/src/main/scala/play/core/ObjectMapperModule.scala

@@ -5,9 +5,10 @@
 package play.core
 
 import scala.concurrent.Future
-
 import akka.actor.ActorSystem
 import akka.serialization.jackson.JacksonObjectMapperProvider
+import com.fasterxml.jackson.annotation.JsonAutoDetect
+import com.fasterxml.jackson.annotation.PropertyAccessor
 import com.fasterxml.jackson.databind.ObjectMapper
 import javax.inject._
 import play.api.inject._
@@ -36,7 +37,9 @@ class ObjectMapperProvider @Inject() (lifecycle: ApplicationLifecycle, actorSyst
       JacksonObjectMapperProvider
         .get(actorSystem)
         .getOrCreate(ObjectMapperProvider.BINDING_NAME, Option.empty)
+    mapper.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.PUBLIC_ONLY)
     Json.setObjectMapper(mapper)
+
     lifecycle.addStopHook { () =>
       Future.successful(Json.setObjectMapper(null))
     }