com.pubnub.api.utils.UnwrapSingleField.kt Maven / Gradle / Ivy

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package com.pubnub.api.utils

import com.google.gson.JsonDeserializationContext
import com.google.gson.JsonDeserializer
import com.google.gson.JsonElement
import java.lang.reflect.Type

internal class UnwrapSingleField : JsonDeserializer {
    override fun deserialize(json: JsonElement, typeOfT: Type, context: JsonDeserializationContext): T {
        val jsonObject = json.asJsonObject
        if (jsonObject.keySet().size != 1)
            error("Couldn't unwrap field for object containing more than 1 field. Actual number of fields: ${jsonObject.keySet().size}")
        val element = jsonObject[jsonObject.keySet().first()]
        return context.deserialize(element, typeOfT)
    }
}