spring boot hypermedia convert child elements to Array instead of Object

I am using spring-boot-1.5.8 and spring-boot-hateoas in my project. Please find the code below

@SpringBootApplication
@EnableHypermediaSupport(type = EnableHypermediaSupport.HypermediaType.HAL)
public class SpringBootK8Application {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootK8Application.class, args);
    }
}

Controller

 @GetMapping("/greeting")
    public ResponseEntity<Greeting> greeting(@RequestParam(value = "name", required = false, defaultValue = "World") String name) {
        Greeting greeting = new Greeting(String.format("Hello, %s!", name));
        greeting.add(linkTo(methodOn(HelloController.class).greeting(name)).withSelfRel());
        Link link = new Link("http://localhost:8080/something").withRel("ACTIONS");
        SuperLink superLink = new SuperLink(link, MediaTypes.HAL_JSON_VALUE,"GET","/v1/books","v1/bookBy");
        greeting.add(superLink);
        return new ResponseEntity<>(greeting, HttpStatus.OK);
    }

Actual output:

{
  "content": "Hello, World!",
  "_links": {
    "self": {
      "href": "http://localhost:9086/greeting?name=World"
    },
    "ACTIONS": {
      "href": "http://localhost:8080/something",
      "template": "http://localhost:8080/something/v1/books",
      "type": "application/hal+json",
      "method": "GET",
      "describedBy": "http://localhost:8080/something/v1/bookBy"
    }
  }
}

Expected output:

{
  "content": "Hello, World!",
  "_links": {
    "self": {
      "href": "http://localhost:9086/greeting?name=World"
    },
    "ACTIONS": [{
      "href": "http://localhost:8080/something",
      "template": "http://localhost:8080/something/v1/books",
      "type": "application/hal+json",
      "method": "GET",
      "describedBy": "http://localhost:8080/something/v1/describedBy"
    }]
  }
}

I would like to show action as an array. If I add more than one element in ACTIONS attribute then it shows array but if we have only one element then it is showing as an object. I would always like to display that element as an array. Any help would be really appreciable.

Start with the @EnableHypermediaSupport configuration and the greeting.add(SuperLink) call shown in the issue, then trace how the ACTIONS relation is serialized when it has one versus multiple links. Done means a single ACTIONS link is serialized as an array while preserving the shown link properties and HAL representation.