如何在 Kotlin 中为具有默认值 true 或 false 或 null 的变量传递值

Question

我已经在 Kotlin 中为“isOlListingEnabled”的不同值编写了以下代码，如 True、False 和 null。我在 PR 上收到的评论是“我们可以在方法 getFlightsOpinionLabModel 中传递 isOlListingEnabled 的值，默认值为 true 或 false 或 null，而不是创建新方法”。有人可以帮我编写下面的代码，以便我可以用相同的方法处理所有三个（真、假和空）值。

package com.abc.api.flights.unit.fixture

import com.abc.api.flights.models.domain.TripType
import com.abc.api.flights.models.ui.opinionlab.FlightsOpinionLabModel
import java.util.UUID

object FlightsOpinionLabModelFixture {

    fun getFlightsOpinionLabModel(tripType: TripType): FlightsOpinionLabModel = FlightsOpinionLabModel(

        siteName = "www.abc.com",
        langId = 1033,
        duaid = UUID.randomUUID(),
        expId = null,
        tripType = tripType,
        isOlListingEnabled = true
    )

    fun getFlightsOpinionLabModelWithoutListingEnabled(tripType: TripType): FlightsOpinionLabModel = FlightsOpinionLabModel(

        siteName = "www.abc.com",
        langId = 1033,
        duaid = UUID.randomUUID(),
        expId = null,
        tripType = tripType,
        isOlListingEnabled = false
    )

    fun getFlightsOpinionLabModelWitListingEnabledNull(tripType: TripType): FlightsOpinionLabModel = FlightsOpinionLabModel(

        siteName = "www.abc.com",
        langId = 1033,
        duaid = UUID.randomUUID(),
        expId = null,
        tripType = tripType,
        isOlListingEnabled = null
    )
}

Answer 1

你的FlightsOpinionLabModelFixture可以这样简化：

object FlightsOpinionLabModelFixture {

    fun getFlightsOpinionLabModel(tripType: TripType, isOlListingEnabled: Boolean? = true): FlightsOpinionLabModel = FlightsOpinionLabModel(
        siteName = "www.abc.com",
        langId = 1033,
        duaid = UUID.randomUUID(),
        expId = null,
        tripType = tripType,
        isOlListingEnabled = isOlListingEnabled
    )
}

调用示例：

// FlightsOpinionLabModelFixture.getFlightsOpinionLabModelWithoutListingEnabled(type)
FlightsOpinionLabModelFixture.getFlightsOpinionLabModel(type, isOlListingEnabled = false)

如何在 Kotlin 中为具有默认值 true 或 false 或 null 的变量传递值

How to pass value for a variable with default value true or false or null in Kotlin

nullable

default-value

kotlin