On Mon, Nov 29, 2010 at 6:28 AM, Petr Gladkikh <petrg...@gmail.com> wrote:
> On Mon, Nov 29, 2010 at 3:29 PM, Ken Wesson <kwess...@gmail.com> wrote:
>> In Java, you often have to pair things, e.g. opening a file and
>> closing it, to avoid leaking resources like file handles.
>>
>> These pairings are among many cases where Java code contains structure
>> that you can't extract and reify in your program.
>
> Well, most things _can_ be reified in Java but resulting code would be
> so bloated, cumbersome and often inefficient so I do not try to do
> that anymore in Java. That is result of such refactoring only makes
> program even worse (here I wrote about my attempts in this direction
> http://petrglad.blogspot.com/2010/02/stream-close-template.html).
That's basically what I meant. If you try, at best you end up with crap like
final File f = whatever;
WithOpen.withOpen(
new NullaryFn(){public doIt(){return f.open();}},
new UnaryFn(){public doIt(Object s){return doSomethingWith((Stream)s);}});
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