dev.fuelyour.vertxkuickstartcore.tools.FullParameter.kt Maven / Gradle / Ivy

Go to download
package dev.fuelyour.vertxkuickstartcore.tools

import dev.fuelyour.vertxkuickstartcore.exceptions.VertxKuickstartException
import java.lang.reflect.Type
import kotlin.reflect.KClass
import kotlin.reflect.KFunction
import kotlin.reflect.KParameter
import kotlin.reflect.jvm.javaType
import kotlin.reflect.jvm.jvmErasure

/**
 * Gets and stores additional information about parameters so that the additional information is easily accessible
 * when needed.
 */
class FullParameter internal constructor(
    val function: KFunction<*>,
    val param: KParameter
) {
    val name: String
        get() = param.name ?: handleMissingParamName()

    val kclass: KClass<*>
        get() {
            val javaType = param.type.javaType
            if (javaType is Class<*> && javaType.isArray)
                return javaType.kotlin
            return param.type.jvmErasure
        }

    val type: Type
        get() = param.type.javaType

    private fun handleMissingParamName(): Nothing {
        throw VertxKuickstartException(
            "Parameter names for the function ${function.name} are missing"
        )
    }
}

val KFunction<*>.fullParameters
    get() = parameters.map {
        FullParameter(this, it)
    }