When we try to parse JSON with only data node, then the optionalData value is changed to null instead of assigning a default value empty as declared in the data class. To understand it clearly, let’s start with a simple data class as shown below: data class SimpleExample( val data : String, var optionalData : String = "empty") Moreover, using reflections in Android is also a downside.Īpart from multi-platform support and using reflections in serialization, there is one more drawback with Java serialization libraries: they won’t support default value variables in Kotlin. Reflections sure as hell won’t work with Kotlin.js and native modules. Kotlin is not restricted to Android(JVM) it supports JavaScript(JS) and IOS(native) development. Serialization libraries like Moshi and Gson are Java libraries that use reflections, which is fine for Android development. But the Kotlin team decided to create a brand new native serialization library for Kotlin. We have many famous and effective serialization libraries out there, like Moshi from Square and Gson from Google.
Why the Kotlin Team Created a New Serialization Library
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