Is this code convertible to a lambda style?

[Павел Шацких]

In terms of perfomance first variant can better because under hood stream
implementation know about 2 predicates and can optimise this (for
example parallelize) on the fly. Anyway I believe it is hard to say about
perfomance benefits in this case. Also I think in terms of readability two
filters looks more elegant and clean but it is a matter of taste :)


2013/12/29 Gernot Neppert <mcnepp02 at googlemail.com>

> Am 28.12.2013 17:00, schrieb Marcos Antonio:
> >
> > Maybe at this point you can call me a little paranoid, but I like a code
> that looks a bit more symmetric (maybe just for aesthetic reasons). This is
> how my code is now:
> >
> > return getMetadataReader().getPropertyDescriptors().stream().
> >      filter(d -> d.getType() == PropertyType.ENTITY).
> >      filter(d -> hasChildAssociation(d)).
> >      findFirst().
> >      map(d -> d.convertToProperty()).
> >      orElse(null);
> >
> >
>
> Maybe it would benefit (at least in terms of readability, but also
> performance-wise) from combining the two filters like this:
>
> return getMetadataReader().getPropertyDescriptors().stream().
>      filter(d -> d.getType() == PropertyType.ENTITY &&
> hasChildAssociation(d)).
>      findFirst().
>      map(d -> d.convertToProperty()).
>      orElse(null);
>
>
>
>


-- 
Pavel