Kotlin 的反射機(jī)制允許在運(yùn)行時(shí)檢查和操作類、對象、接口、函數(shù)等。要實(shí)現(xiàn)動態(tài)功能,可以使用 kotlin.reflect
包中的類和函數(shù)。以下是一些常見的使用場景和示例:
import kotlin.reflect.KClass
import kotlin.reflect.full.declaredFunctions
import kotlin.reflect.full.memberFunctions
import kotlin.reflect.jvm.kotlinFunction
fun main() {
val kClass: KClass<String> = String::class
println("Class name: ${kClass.qualifiedName}")
println("Declared functions: ${kClass.declaredFunctions.size}")
println("Member functions: ${kClass.memberFunctions.size}")
}
import kotlin.reflect.KFunction
import kotlin.reflect.full.callBy
fun main() {
val kClass: KClass<String> = String::class
val function: KFunction<String> = kClass.functions.first { it.name == "plus" }
val result = function.callBy(mapOf("a" to "1", "b" to "2"))
println("Result: $result")
}
import kotlin.reflect.KClass
import kotlin.reflect.jvm.kotlin
fun main() {
val kClass: KClass<String> = String::class
val instance = kClass.kotlin.createInstance()
println("Instance: $instance")
}
import kotlin.reflect.KClass
import kotlin.reflect.full.declaredMemberProperties
import kotlin.reflect.jvm.kotlinProperty
fun main() {
val kClass: KClass<String> = String::class
val property: KProperty<String> = kClass.declaredMemberProperties.first { it.name == "length" }
property.setter.call(property.getter.call("Hello, world!"), "New length")
println("Length: ${property.getter.call()}")
}
這些示例展示了如何使用 Kotlin 反射機(jī)制實(shí)現(xiàn)動態(tài)功能。你可以根據(jù)需要調(diào)整代碼以滿足特定場景的需求。