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https://issues.apache.org/jira/browse/LANG-1538?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary D. Gregory closed LANG-1538.
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Resolution: Won't Do
> Implement the functions of the Utils classes as Kotlin extension functions.
> ---------------------------------------------------------------------------
>
> Key: LANG-1538
> URL: https://issues.apache.org/jira/browse/LANG-1538
> Project: Commons Lang
> Issue Type: New Feature
> Components: lang.*
> Reporter: Isira Seneviratne
> Priority: Major
>
> This would provide the following advantages:
> Conciseness - Kotlin code is overall much more concise than Java code. For
> instance, the following method in BooleanUtils:
> {code:java}
> public static Boolean negate(final Boolean bool) {
> if (bool == null) {
> return null;
> }
> return bool.booleanValue() ? Boolean.FALSE : Boolean.TRUE;
> }
> {code}
> can be represented as a single line in Kotlin:
> {code:java}
> fun Boolean?.negate() = this?.not()
> {code}
> Compatibility with Java - Kotlin extension functions are compiled as static
> methods in Java bytecode, so existing code that makes use of Apache Commons
> Lang will not be affected by the conversion.
> Kotlin support - Extension functions can be called in Kotlin code as if they
> were part of the original class declaration. For instance, the above method
> can be called as follows:
> {code:java}
> val bool: Boolean? = null
> bool.negate() // returns null
> {code}
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