I'm not quite sure of the terminology here, but I have a class, and in the new(), or rather _initiate method ( the base class looks after new() ), I want to check for certain conditions, then convert the object to a sub-class, usually I'd do this by... 
package DUM::DUMMY;
use base 'DUM::Base';
use UNIVERSAL::require;
sub _initiate
{
   ...
        if ($self->{extension})
        {
                 my $backend = 'DUM::DUMMY::'.$self->{extension};
                $backend->require;
                bless $self, $backend;
        }

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What's regarded as best-practice in these situations?

In reply to converting to a sub-class by Cagao

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