kotlin-serialization

name	kotlin-serialization
description	kotlinx.serialization - JSON, Protobuf, custom serializers
version	1.0.0
sasmp_version	1.3.0
bonded_agent	01-kotlin-fundamentals
bond_type	SECONDARY_BOND
execution	{"timeout_ms":30000,"retry":{"max_attempts":3,"backoff":"exponential","initial_delay_ms":1000}}
parameters	{"required":[{"name":"format","type":"string","validation":"^(json|protobuf|cbor|custom)$"}],"optional":[{"name":"version","type":"string","default":"1.6.3"}]}
logging	{"level":"info","events":["skill_invoked","format_loaded","error_occurred"]}

Kotlin Serialization Skill

Type-safe serialization with kotlinx.serialization.

Topics Covered

JSON Serialization

@Serializable
data class User(
    val id: Long,
    val name: String,
    @SerialName("email_address") val email: String,
    val createdAt: Instant = Instant.now()
)

val json = Json {
    ignoreUnknownKeys = true
    encodeDefaults = true
    prettyPrint = true
}

val user = json.decodeFromString<User>(jsonString)
val output = json.encodeToString(user)

Custom Serializers

object InstantSerializer : KSerializer<Instant> {
    override val descriptor = PrimitiveSerialDescriptor("Instant", PrimitiveKind.LONG)
    override fun serialize(encoder: Encoder, value: Instant) = encoder.encodeLong(value.toEpochMilli())
    override fun deserialize(decoder: Decoder) = Instant.ofEpochMilli(decoder.decodeLong())
}

@Serializable
data class Event(
    @Serializable(with = InstantSerializer::class) val timestamp: Instant
)

Polymorphic Serialization

@Serializable
sealed   {
     
      ( : String) : Response()

     
      ( message: String) : Response()
}

 json = Json { classDiscriminator =  }