如何处理由spring-hateoas注入的_templates中的字段

Question

我正在用Kotlin设置Spring Boot应用程序，旨在使其成为HAL-FROMS媒体类型的超媒体驱动。看了spring-hateoas - 1.0.0.M1的最新发行版。

找不到任何文档或示例来说明如何设置_templates详细信息。该文档显示了example代码，可以使应用使用以下内容进行回复：

...

"_templates" : {
    "default" : {
      "title" : null, <-- how to set?
      "method" : "put",
      "contentType" : "", <-- how to set?
      "properties" : [ {
        "name" : "firstName",
        "required" : true
      }, {
        "name" : "lastName",
        "required" : true
      }, {
        "name" : "role",
        "required" : true <-- how to make optional?
      } ]
    },

...

我怎样才能从https://github.com/spring-projects/spring-hateoas-examples/tree/master/affordances那里获取代码并使它返回如下所示的正文？

...

"_templates" : {
    "default" : {
      "title" : "Create new user"
      "method" : "put",
      "contentType" : "application/json"
      "properties" : [ {
        "name" : "firstName",
        "required" : true
      }, {
        "name" : "lastName",
        "required" : true
      }, {
        "name" : "role",
        "required" : false
      } ]
    },

...