GSON,用于多个类的自定义反序列化程序

例1:

 {
     "res": {
          "status": {
              "code": 0,
              "message": "some message",
          }
     },
     "somedata": {
         "someid" = "12345",
         "sometext" = "a text" 
     }
 }

例2:

{
     "res": {
          "status": {
              "code": 0,
              "message": "another message",
          }
     },
     "anotherdata": {
         "anotherid" = "54321",
         "anothertext" = "b text" 
     }
 }

这是用于映射数据的相对kotlin类(我将使用反序列化器来提取“res”对象中的数据):

abstract class GenericResponse() {
    //abstract class for common fields
    constructor(status: Status?) : this()
}

class Status(
    val code: Int,
    val message: String
)

这是特定的反应类型:

data class SomeData(
    val status: Status,
    val someid : String,
    val sometext : String
): GenericResponse(status)


data class AnotherData(
    val status: Status,
    val anotherid : String,
    val anothertext : String
): GenericResponse(status)

class CustomDeserializer : JsonDeserializer<GenericResponse> {
    override fun deserialize(
        json: JsonElement?,
        typeOfT: Type?,
        context: JsonDeserializationContext?
    ): GenericResponse {

    val rootElement = json!!.asJsonObject.getAsJsonObject("res")
    //further implementation, should return SomeData or AnotherData object
}