Initialize a subclass inside a namespace

Ruby
1

I have a namespace Foo and a class Bas and a class Bar. I am adding
classes Bas & Bar are both inside the namespace Foo.

module Foo
class Bas
.
end

class Bar
.
end
end

I have some dynamically added classes that are subclasses of Bar, but I
want them to be in a namespace under Foo::Bas e.g. Foo::Bas::ThisClass
& Foo::Bar::ThatClass

class this < Bar
.
end

I put them into the namespace Foo::Bas as follows;

module Foo
class Bas
def self.load_stuff
module_eval File.read(file_name_where_this_class_is_defined)
end
end
end

This all works, but I would like to include some code that runs in the
context of ThisClass but before the contents of
file_name_where_this_class_is_defined, but the catch is I cannot assume
the names of the classes being loaded from the file, therefore I am
looking for a callback that is run in context of ThisClass as soon as
ThisClass is defined.

Any ideas?

Thanks,
James

2

On 10/14/06, J2M [email protected] wrote:

end
end

I have some dynamically added classes that are subclasses of Bar, but I
want them to be in a namespace under Foo::Bas e.g. Foo::Bas::ThisClass
& Foo::Bar::ThatClass
…

This all works, but I would like to include some code that runs in the
context of ThisClass but before the contents of
file_name_where_this_class_is_defined, but the catch is I cannot assume
the names of the classes being loaded from the file, therefore I am
looking for a callback that is run in context of ThisClass as soon as
ThisClass is defined.

I don’t see a callback when a class (or any constant for that matter)
is added to a module.

On the other hand, can you do what you want by overriding
Foo::Bar.inherited ? At least you can tell when a subclass has been
created.

–
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/

3

Good idea Dave, I will give that a go.

Thanks,
James

4

Whoops replied to the wrong message!

Thanks Rick, that worked perfectly.

James