Array property in data class

Reports properties with an Array type in a data class without overridden equals() or hashCode().

Array parameters are compared by reference equality, which is likely an unexpected behavior. It is strongly recommended to override equals() and hashCode() in such cases.

Example:

data class Text(val lines: Array<String>)

The quick-fix generates missing equals() and hashCode() implementations:

data class Text(val lines: Array<String>) {
    override fun equals(other: Any?): Boolean {
        if (this === other) return true
        if (javaClass != other?.javaClass) return false

        other as Text

        if (!lines.contentEquals(other.lines)) return false

        return true
    }

    override fun hashCode(): Int {
        return lines.contentHashCode()
    }
}

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Kotlin, @snapshot@

Last modified: 13 July 2023