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From Matt Sicker <boa...@gmail.com>
Subject Re: Pair of nulls
Date Thu, 11 May 2017 05:58:08 GMT
Matching the of() static factories, how about ImmutablePair.ofNull()

On 11 May 2017 at 00:03, Gary Gregory <garydgregory@gmail.com> wrote:

> On Wed, May 10, 2017 at 9:27 PM, Matt Sicker <boards@gmail.com> wrote:
>
> > Wouldn't it make sense to expose typed methods like in
> > Collections.emptyList() et al.?
> >
>
> So in this case:
>
> ImmutablePair.nullPair()
>
> Gary
>
> >
> > On 10 May 2017 at 22:10, Javen O'Neal <onealj@apache.org> wrote:
> >
> > > +1
> > >
> > > The of method should check if all elements are null, and if so to
> return
> > > the NULL singleton. This would reduce the number of objects created and
> > > garbage collected.
> > >
> > > So long as ImmutablePair and ImmutableTriple classes are final (not
> > > subclassable), then identity checking could be used in place of
> equality
> > > checking when comparing against a null tuple. This would be marginally
> > > faster.
> > >
> > > Any preference of being explicit (redundant) here?
> > > ImmutablePair.NULL_PAIR and ImmutableTriple.NULL_TRIPLE
> > >
> > > On May 10, 2017 7:35 PM, "Gary Gregory" <garydgregory@gmail.com>
> wrote:
> > >
> > > Hi All,
> > >
> > > Any thoughts for or against adding the following to ImmutablePair:
> > >
> > >
> > >     /**
> > >      * An immutable pair of nulls.
> > >      */
> > >     // This is not defined with generics to avoid warnings in call
> sites.
> > >     @SuppressWarnings("rawtypes")
> > >     public static final ImmutablePair NULL = ImmutablePair.of(null,
> > null);
> > >
> > > Same for ImmutableTriple.
> > >
> > > ?
> > >
> > > Thank you,
> > > Gary
> > >
> > > --
> > > E-Mail: garydgregory@gmail.com | ggregory@apache.org
> > > Java Persistence with Hibernate, Second Edition
> > > <https://www.amazon.com/gp/product/1617290459/ref=as_li_
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> > >
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> >
> >
> >
> > --
> > Matt Sicker <boards@gmail.com>
> >
>
>
>
> --
> E-Mail: garydgregory@gmail.com | ggregory@apache.org
> Java Persistence with Hibernate, Second Edition
> <https://www.amazon.com/gp/product/1617290459/ref=as_li_
> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1617290459&
> linkCode=as2&tag=garygregory-20&linkId=cadb800f39946ec62ea2b1af9fe6a2b8>
>
> <http:////ir-na.amazon-adsystem.com/e/ir?t=garygregory-20&l=am2&o=1&a=
> 1617290459>
> JUnit in Action, Second Edition
> <https://www.amazon.com/gp/product/1935182021/ref=as_li_
> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182021&
> linkCode=as2&tag=garygregory-20&linkId=31ecd1f6b6d1eaf8886ac902a24de418%22
> >
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> <http:////ir-na.amazon-adsystem.com/e/ir?t=garygregory-20&l=am2&o=1&a=
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> Blog: http://garygregory.wordpress.com
> Home: http://garygregory.com/
> Tweet! http://twitter.com/GaryGregory
>



-- 
Matt Sicker <boards@gmail.com>

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