[jira] [Commented] (LANG-1050) Change nullToEmpty methods to generics

["Duncan Jones (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LANG-1050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14172443#comment-14172443 ] 

Duncan Jones commented on LANG-1050:
------------------------------------

I'm not sure such a method is possible. How would you create an empty array of type {{T[]}}?

One solution might be to call {{java.lang.reflect.Array.newInstance(type, 0)}}, but that would require this method to accept a {{Class<?> type}} parameter. That might be a little awkward to use, e.g.

{code:java}
Long[] array = ArrayUtils.nullToEmpty(someArray, Long.class);
{code}

> Change nullToEmpty methods to generics
> --------------------------------------
>
>                 Key: LANG-1050
>                 URL: https://issues.apache.org/jira/browse/LANG-1050
>             Project: Commons Lang
>          Issue Type: Improvement
>          Components: lang.*
>            Reporter: James Sawle
>
> Currently there are multiple Object based methods which could be replaced by a single generic method.
> - public static Long[] nullToEmpty(final Long[] array)
> - public static Integer[] nullToEmpty(final Integer[] array)
> - public static Short[] nullToEmpty(final Short[] array)
> - public static Character[] nullToEmpty(final Character[] array)
> - public static Byte[] nullToEmpty(final Byte[] array)
> - public static Double[] nullToEmpty(final Double[] array)
> - public static Float[] nullToEmpty(final Float[] array)
> - public static Boolean[] nullToEmpty(final Boolean[] array)
> Recommendation, replace all of these with a single method that would also allow a defensive programming style when not using wrapped primitives.
> - public static <T> T[] nullToEmpty(final T[] array)



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