dada has asked for the wisdom of the Perl Monks concerning the following question:
hello,
does this makes some sense? are there better ways, in OO practice, to implement such a structure?
I have a little doubt about OO terminology. we all know that we can do:
and we known that bar(), in this case, is being called as a "class method" (or "static method") instead of as an "instance method".package Foo; sub bar { print "Foo::bar!\n"; } package main; my $x = 'Foo'; $x->bar();
but how do you call $x? it is just a string, which represents a package name. so it doesn't seems a "class reference". maybe a "symbolic class reference"?
I came across this trying to implement an object hierarchy in which I can have several "backend" classes and a "frontend" object. now, I don't need to instantiate backend objects, I only need to know which backend the main object refers to. so I thought something like this:
package Thing; sub new { my($class, %option) = @_; my $self = { backend => "Thing::Backend::".$option{backend}, }; return bless $self, $class; } sub backend { my($self) = @_; return $self->{backend}; } package Thing::Backend::A; sub do { print "doing A\n"; } package Thing::Backend::B; sub do { print "doing B\n"; } package Thing::Backend::C; sub do { print "doing C\n"; } package main; my $x = Thing->new( backend => 'A' ); $x->backend->do();
cheers,
Aldo
Aldo
King of Laziness, Wizard of Impatience, Lord of Hubris
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Replies are listed 'Best First'. | |
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Re: how do you call this? $x->bar();
by Corion (Patriarch) on Mar 15, 2004 at 12:05 UTC | |
Re: how do you call this? $x->bar();
by Aristotle (Chancellor) on Mar 15, 2004 at 12:11 UTC | |
Re: how do you call this? $x->bar();
by rinceWind (Monsignor) on Mar 15, 2004 at 14:55 UTC | |
by stvn (Monsignor) on Mar 15, 2004 at 15:59 UTC | |
by simonm (Vicar) on Mar 15, 2004 at 16:58 UTC | |
by stvn (Monsignor) on Mar 15, 2004 at 18:20 UTC | |
Re: how do you call this? $x->bar();
by NetWallah (Canon) on Mar 15, 2004 at 19:10 UTC | |
by linux454 (Pilgrim) on Mar 16, 2004 at 16:51 UTC | |
by NetWallah (Canon) on Mar 16, 2004 at 17:26 UTC |
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