在深度嵌套数据类中调用 getter 的更优雅方法

发布于 2025-01-11 05:55:32 字数 734 浏览 1 评论 0原文

我已经反序列化了一个巨大的 XML 文件，这给我留下了很多（嵌套的）数据类。我正在寻找一种更优雅的方法来调用这些对象中的特定 getter。所以我不想用所有这些点调用来填充我的代码。

我必须设置相当多的字段来返回一个新模型，目前看起来像这样（我为这个问题编写了模型）：

        return TestClass(
    appointmentDate = message.data.appointment.appointmentDescription.AppointmentDetails.appointmentDate
    appointmentX = message.data.appointment.appointmentDescription.X.Y.Z
    appointmentY = message.data.appointment.appointmentDescription.AppointmentDetails.X.Y.Z
    appointmentZ = message.data.appointment.Z
    )

我知道我可以执行 val AppointmentDescription = message.data.appointment.appointmentDescription 并从那里可以缩短一点，但我认为一定有一个更短更好的方法。

有谁知道如何以更优雅和干净的方式做到这一点？我对 Kotlin 还很陌生，我很难在互联网上正确查找任何解决方案，因为我找不到任何解决方案，并且可能正在寻找错误的东西。

原文

I have deserialized a huge XML file and that leaves me with a lot of (nested) data classes. I'm looking for a more elegant way to do calls to specific getters within these objects. So I would rather not fill my code with all these dot calls.

I have to set quite some fields to return a new Model, which currently looks something like this (I made up the model for this question):

        return TestClass(
    appointmentDate = message.data.appointment.appointmentDescription.AppointmentDetails.appointmentDate
    appointmentX = message.data.appointment.appointmentDescription.X.Y.Z
    appointmentY = message.data.appointment.appointmentDescription.AppointmentDetails.X.Y.Z
    appointmentZ = message.data.appointment.Z
    )

I know I could do val appointmentDescription = message.data.appointment.appointmentDescription and do my calls from there to shorten it a bit, but there must be a shorter and better way I assume.

Does anyone know a way to do this in a more elegant and clean way? I'm pretty new to Kotlin and it is quite hard for me to properly lookup any solutions on the internet since I can't find any and am probably searching for the wrong things.

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感情旳空白 2025-01-18 05:55:32

尝试使用 with 函数：

data class Message (val data: Data)
data class Data (val appointment: Appointment)
data class Appointment(val appointmentDescription: AppointmentDescription)
data class AppointmentDescription(val x: Int, val appointmentDetails: AppointmentDetails)
data class AppointmentDetails(val x:Int, val y:Int)

fun TestClass(message: Message) {
    with(message.data.appointment.appointmentDescription) {
        val appointmentX = x
        val appointmentY = appointmentDetails.y
    }
}

这应该很有用：https://medium.com/mobile-app-development-publication/mastering-kotlin-standard-functions-run-with-let-also-and-apply-9cd334b0ef84

Try the with function:

data class Message (val data: Data)
data class Data (val appointment: Appointment)
data class Appointment(val appointmentDescription: AppointmentDescription)
data class AppointmentDescription(val x: Int, val appointmentDetails: AppointmentDetails)
data class AppointmentDetails(val x:Int, val y:Int)

fun TestClass(message: Message) {
    with(message.data.appointment.appointmentDescription) {
        val appointmentX = x
        val appointmentY = appointmentDetails.y
    }
}

This should be useful: https://medium.com/mobile-app-development-publication/mastering-kotlin-standard-functions-run-with-let-also-and-apply-9cd334b0ef84

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