[ http://issues.apache.org/jira/browse/LANG-291?page=all ]
David J. M. Karlsen updated LANG-291:
-------------------------------------
Attachment: ObjectUtils-patch-rev470351.txt
PLease delete the DateUtils patch, and use this more general patch with
max(Comparable, Comparable) an min(Comparable, Comparable) methods in
ObjectUtils.
A compareTo( Comparable, Comparable ) is left out, as this would violate Java
protocol, see
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Comparable.html
"Note that null is not an instance of any class, and e.compareTo(null) should
throw a NullPointerException even though e.equals(null) returns false."
> Null-safe comparison methods for finding most recent / least recent dates.
> --------------------------------------------------------------------------
>
> Key: LANG-291
> URL: http://issues.apache.org/jira/browse/LANG-291
> Project: Commons Lang
> Issue Type: Improvement
> Environment: N/A
> Reporter: David J. M. Karlsen
> Fix For: 3.0
>
> Attachments: DateUtils-patch-rev468924.txt,
> ObjectUtils-patch-rev470351.txt
>
>
> /**
> * <p>
> * Null-safe date comparison.
> * Returnes the most recent date if date1 and date2 is non-null.
> * If one of the dates are null, the non-null will be returned.
> * If both are null, null will be returned.
> * </p>
> * @param date1
> * @param date2
> * @return
> */
> public static Date mostRecent( Date date1, Date date2 )
> /**
> * <p>
> * Null-safe date comparison.
> * Returnes the least recent (oldest) date if date1 and date2 is
> non-null.
> * If one of the dates are null, the non-null will be returned.
> * If both are null, null will be returned.
> * </p>
> * @param date1
> * @param date2
> * @return
> */
> public static Date leastRecent( Date date1, Date date2 )
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