Hi Rob,
thanks for the proposal. Yes, you're right I can use this. I haven't seen
it before nor realize it.
It also evokes the question whether it's self explanatory. Maybe it was
only me who didn't know it, but I haven't seen either of my colleagues use
it.
I see you can use also defaults as:
Optional.ofNullable(object)
.map(ObjectType::getProperty).or(() -> Optional.of(DEFAULT_PROPERTY))
.orElse(null);
It seems to me a bit heavy, but I agree, it's possible.
So you would recommend not including it in the library?
Thanks,
Juraj+
On Sat, 18 Jul 2020 at 15:44, Rob Spoor <apa...@icemanx.nl> wrote:
> Can't you just use java.util.Optional? That was added way back (ahum) in
> Java 8.
> Converting your example:
>
> SubSubSubProperty value = Optional.ofNullable(object)
> .map(ObjectType::getProperty)
> .map(Property::getSubProperty)
> .map(SubProperty::getSubSubProperty)
> .map(SubSubProperty::getSubSubSubProperty)
> .orElse(null);
>
>
> On 18/07/2020 14:28, Juraj Jurčo wrote:
> > Hi guys,
> > I'm new in this list and I would like to contribute to Apache commons.
> > First of all I would like get some feedback if it makes sense to
> contribute.
> >
> > Java is slow in implementation of null-safe operator however sometimes
> it's
> > really needed. So far I didn't find any implementation of this in any
> > library and I think it can be useful for many developers.
> >
> > To the point, instead of writing something like:
> > if(object != null
> > && object.getProperty() != null
> > && object.getProperty().getSubProperty() != null
> > && object.getProperty().getSubProperty().getSubSubProperty() !=
> > null ){
> > Object value =
> >
> object.getProperty().getSubProperty().getSubSubProperty().getSubSubSubProperty();
> > }
> >
> > I would like to turn it into something like this:
> > Object value = ObjectUtils
> > .nullish(object)
> > .nullish(object::getProperty)
> > .nullish(Property::getSubProperty)
> > .nullish(SubProperty::getSubSubProperty)
> > .get(SubSubProperty::getSubSubSubProperty);
> >
> > The idea is to return null in the case any property 'on the way' returns
> > null. I can implement it with defaults as well.
> >
> > Do you have some objections to the implementation? Do you know if it
> > already exists somewhere?
> >
> > Thanks for your feedback,
> > best, Juraj+
> >
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org
> For additional commands, e-mail: dev-h...@commons.apache.org
>
>
