RE: [Springframework-developer] Comparator singletons MIA?

[Oliver H. <Ol...@ou...>]

Actually I see this is only the case for ComparableComparator (I've got
to many versions of the code open at the moment) the NullSafeComparator
and BooleanComparator singletons are still there.=20

My question still stands through.=20

Oliver

> -----Original Message-----
> From: spr...@li...=20
> [mailto:spr...@li...]
>  On Behalf Of Oliver Hutchison
> Sent: Friday, 22 July 2005 10:32 AM
> To: spr...@li...
> Subject: [Springframework-developer] Comparator singletons MIA?
>=20
> Jurgen,=20
>=20
> I've just started upgrading Spring Rich to the latest spring=20
> code base and noticed that all of the Comparator singletons=20
> (which Spring Rich uses a lot) in the o.s.util.comparator=20
> package have been removed.=20
>=20
> These classes are IMHO perfect examples of where you should=20
> be using a singleton. Given that every instance will exhibit=20
> exactly the same behaviour, why would you ever want to have=20
> more that one instance of a class like ComparableComparator?=20
> Also how much cleaner is this:
>=20
> ComparableComparator.nullSafeInstance().compare(argument1, argument2)
>=20
> to this?
>=20
> new NullSafeComparator(new ComparableComparator(),=20
> true).compare(argument1, argument2)
>=20
> and more performant to boot.
>=20
> Anyway, obviously I can live without them, but I'm curious=20
> about the rational behind the removal?=20
>=20
> Thanks,
>=20
> Oliver
>=20
>=20
>=20
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