spotbugs 与 Kotlin 兼容吗？

Question

当运行在 Kolin 项目上发现错误时，我得到如下错误：

[ERROR] Private method com.example.CSVRecord.component1() is never called [com.example.CSVRecord] In CSVRecord.kt UPM_UNCALLED_PRIVATE_METHOD

在类例如：

data class CSVRecord(private val columns: SortedSet<CSVColumn>) : Iterable<String> {

    override fun iterator(): Iterator<String> {
        return columns.map { it.value }.iterator()
    }
}

我不是很清楚 component1 来自哪里！

Answer 1

根据 Data Classes 文档：

The compiler automatically derives the following members from all properties declared in the primary constructor:

equals()/hashCode() pair;

toString() of the form "User(name=John, age=42)";

componentN() functions corresponding to the properties in their order of declaration;

copy() function (see below).

这是数据的特征之一类。自动生成的 componentN 函数允许您在这种类型的类上使用 Destructuring Declarations：

data class Result(val result: Int, val status: Status)
fun function(...): Result {
    // computations

    return Result(result, status)
}

// Now, to use this function:
val (result, status) = function(...)

spotbugs 与 Kotlin 兼容吗？

Is spotbugs compatible with Kotlin?

kotlin

spotbugs