Isira Seneviratne created LANG-1538:
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Summary: 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
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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