I have Java POJO class like this:
class Topic {
@SerializedName("id")
long id;
@SerializedName("name")
String name;
}
and I have a Kotlin data class Like this
data class Topic(val id: Long, val name: String)
How to provide the json key to any variables of the kotlin data class like the @SerializedName annotation in java variables ?
Data class:
data class Topic(
@SerializedName("id") val id: Long,
@SerializedName("name") val name: String,
@SerializedName("image") val image: String,
@SerializedName("description") val description: String
)
to JSON:
val gson = Gson()
val json = gson.toJson(topic)
from JSON:
val json = getJson()
val topic = gson.fromJson(json, Topic::class.java)
Create any class data and inherit JSONConvertable interface
interface JSONConvertable {
fun toJSON(): String = Gson().toJson(this)
}
inline fun <reified T: JSONConvertable> String.toObject(): T = Gson().fromJson(this, T::class.java)
Data class
data class User(
@SerializedName("id") val id: Int,
@SerializedName("email") val email: String,
@SerializedName("authentication_token") val authenticationToken: String) : JSONConvertable
From JSON
val json = "..."
val object = json.toObject<User>()
To JSON
val json = object.toJSON()
You can use similar in Kotlin class
class InventoryMoveRequest {
@SerializedName("userEntryStartDate")
@Expose
var userEntryStartDate: String? = null
@SerializedName("userEntryEndDate")
@Expose
var userEntryEndDate: String? = null
@SerializedName("location")
@Expose
var location: Location? = null
@SerializedName("containers")
@Expose
var containers: Containers? = null
}
And also for nested class you can use same like if there is nested object. Just provide Serialize name for the Class.
@Entity(tableName = "location")
class Location {
@SerializedName("rows")
var rows: List<Row>? = null
@SerializedName("totalRows")
var totalRows: Long? = null
}
so if get response from the server each key will map with JOSN.
Alos, convert List to JSON:
val gson = Gson()
val json = gson.toJson(topic)
ndroid convert from JSON to Object:
val json = getJson()
val topic = gson.fromJson(json, Topic::class.java)