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Applying Serializable to the Kotlin class instructs the serialization plugin to automatically generate implementation of KSerializer for the current class, that can be used to serialize and deserialize the class. For example, third-party clients can't extend your sealed class in their code. Kotlin Sealed Interfaces with KotlinX Serialization JSON I heavily use sealed interfaces to model result objects in Kotlin as they allow me to create a type of classes that can be handled using exhaustive when statements, similar to an enum, but also each type can contain its own properties. The main entry point to the serialization process. No other subclasses may appear outside a module within which the sealed class is defined. Based on these descriptions we build the house. All direct subclasses of a sealed class are known at compile time. It may be any format like JSON, xml and it follows the protocol buffers. The error .exc.InvalidDefinitionException: Cannot construct instance of . Sealed classes and interfaces represent restricted class hierarchies that provide more control over inheritance. Thanks to that we are sure what are subclasses of a sealed class just by analyzing a single file. Kotlin Serialization is not just a library. What sealed modifier does is that it is impossible to define another subclass of this class outside of the file. Kotlin Serialization fully supports and enforces the Kotlin type system, making sure only valid objects can be deserialized. Val response = makeXMLHttpRequest(url,userSerial, HttpMethod.POST, CTX_PRINT_SHOP, "testDeep") Sealed classes are abstract classes with a concrete number of subclasses all defined in the same file. The following code still just pushing out the success portion of the sealed class testSealed():TestSealedClass>" Trying it out in a kotlin multi-platform project Internal object PolymorphicClassDesc : SerialClassDescImpl( "kotlin.I was able to remove the dependency on :jackson-module-kotlin:2.10.3 and the project still worked. rialization reduces the size of the JSON that results when serializing objects by omitting the default values of object properties. Import import import import import import import import import fun serializationModel( vararg serializables : KClass) = SerializationModel(serializables)Ĭlass SerializationModel( val serializables : Array>)Ĭlass ModelSerializer( private val model : SerializationModel) : KSerializer