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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

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Kotlin, 241.16690-IJ

Last modified: 29 April 2024