CODEWITHSUNDEEP
jsonkotlingson
Ali Yucel Akgul
Ali Yucel Akgul

Reputation: 1123

Get SerializedName param from child class in Kotlin

I am trying to parse an API response mainly constructured like this:

{
    "ApiFunc1":{
        "SomeData1":"SomeValue1",
        "SomeData2":"SomeValue2",
        "SomeData3":"SomeValue3"
    }
}


{
    "ApiFunc2":{
        "SomeData4":"SomeValue4",
        "SomeData5":"SomeValue5",
        "SomeData6":"SomeValue6"
    }
}
.
.
.

I created a base class as follows:

class Model_BaseResponse<TResponse> : Serializable {

    @SerializedName("ErrorMessage")
    var errorMessage: String? = null

    @SerializedName("value")
    var data: TResponse? = null

}

Each ApiFunc returns different data. I want to create a base class where data: TResponse's @SerializedName("ApiFunc1") or @SerializedName("ApiFunc2") can be set in child class. Is there any way to that? I do it in regular way, defining the 

@SerializedName("value")
var data: TResponse? = null

in every child class. Just been curious about that. Thanks in advance for any idea.

Upvotes: 1

Views: 904

Answers (1)

s1m0nw1
s1m0nw1

Reputation: 82057

An annotation like SerializedData requires its arguments to be compile-time constants. Having a look at what "compile-time constant" means in Kotlin reveals:

Properties the value of which is known at compile time can be marked as compile time constants using the const modifier. Such properties need to fulfil the following requirements:

  • Top-level or member of an object
  • Initialized with a value of type String or a primitive type
  • No custom getter

Such properties can be used in annotations:

const val SUBSYSTEM_DEPRECATED: String = "This subsystem is deprecated"

@Deprecated(SUBSYSTEM_DEPRECATED) fun foo() { ... }

I believe the first requirement "Top-level or member of an object" cannot be fulfilled for your use case.

Upvotes: 1

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