@JvmInline
value class ClassLoaderRole(val local: Boolean)


interface ClassEncoder {
    fun WriteContext.encodeClass(type: Class<*>)
}


interface ClassDecoder {
    fun ReadContext.decodeClass(): Class<*>
}


class DefaultReadContext(
    codec: Codec<Any?>,

    private
    val decoder: Decoder,

    private
    val beanStateReaderLookup: BeanStateReaderLookup,

internal
class DefaultClassDecoder : ClassDecoder {

    private
    val classes = ReadIdentities()

    private
    val scopes = ReadIdentities()

    override fun ReadContext.decodeClass(): Class<*> {
        val id = readSmallInt()
        val type = classes.getInstance(id)
        if (type != null) {
            return type as Class<*>
        }
        val name = readString()

    fun getResultingEnvironment(): Map<Int, Any> =
        refs.invert()
}


private
class EnvironmentDecoder(
    val environment: Map<Int, Any>
) : ClassDecoder {
    override fun ReadContext.decodeClass(): Class<*> =
        environment[readSmallInt()]?.uncheckedCast()!!
}


/**
 * TODO: report problems via the Problems API
 */
private
object ThrowingProblemsListener : AbstractProblemsListener() {