Kotlin-TypeReference<T>无法获取类型参数的类<*>

TypeReference<T> 像这样:

abstract class TypeReference<T> : Comparable<T> {

    val type: Type get() = getGenericType()
    val arguments: List<Type> get() = getTypeArguments()

    final override fun compareTo(other: T): Int {
        return 0
    }

    private fun getGenericType(): Type {
        val superClass = javaClass.genericSuperclass

        check(superClass !is Class<*>) {
            "TypeReference constructed without actual type information."
        }

        return (superClass as ParameterizedType).actualTypeArguments[0]
    }

    private fun getTypeArguments(): List<Type> {
        val type = getGenericType()
        return if (type is ParameterizedType) {
            type.actualTypeArguments.toList()
        } else emptyList()
    }
}

Class<*>

fun Type.toClass(): Class<*> = when (this) {
    is ParameterizedType -> rawType.toClass()
    is Class<*> -> this
    else -> Class.forName(typeName)
}

我正在这样进行单元测试:

@Test
fun `TypeReference should correctly identify the List of BigDecimal type`() {

    // Arrange
    val expected = List::class.java
    val expectedParameter1 = BigDecimal::class.java
    val typeReference = object : TypeReference<List<BigDecimal>>() {}

    // Act
    val actual = typeReference.type.toClass()
    val actualParameter1 = typeReference.arguments[0].toClass()

    // Assert
    assertEquals(expected, actual)
    assertEquals(expectedParameter1, actualParameter1)
}

我认为问题在于扩展函数 else -> Class.forName(typeName) 当它抛出:

属于 Type