package Module::New::Loader;
use strict;
use warnings;
use Carp;
use String::CamelCase qw( camelize );
sub new {
my ($class, @base) = @_;
unless ( grep { $_ eq 'Module::New' } @base ) {
push @base, 'Module::New';
}
bless { _base => \@base }, $class;
}
sub _base { @{ shift->{_base} } }
sub load_class {
my ($self, @parts) = @_;
@parts = map { tr/a-zA-Z0-9_://cd; camelize( $_ ); }
grep { defined } @parts;
foreach my $base ( $self->_base ) {
my $package = join '::', $base, @parts;
if ( $self->{_reload} ) {
(my $file = $package) =~ s|::|/|g;
delete $INC{"$file.pm"};
}
local $@;
eval "require $package; $package->import;";
if ( $@ ) {
next if $@ =~ /^Can't locate/;
croak $@;
}
return $package;
}
croak "Can't locate ".(join '::', @parts);
}
sub reload_class {
my $self = shift;
local $self->{_reload} = 1;
$self->load_class(@_);
}
sub load {
my ($self, $type, $name, @args) = @_;
$self->load_class($type, $name)->new(@args);
}
1;
__END__
=head1 NAME
Module::New::Loader
=head1 SYNOPSIS
=head1 DESCRIPTION
my $loader = Module::New::Loader->new('SomeClass');
my $object = $loader->load('Recipe', 'Foo', @args);
# the $object should hopefully be SomeClass::Recipe::Foo,
# or Module::New::Recipe::Foo if the former is not found.
# (or croaks if the latter is not found, either.)
=head1 METHODS
This is a dedicated module loader used internally.
=head2 new
may take some extra namespaces, and creates a loader object.
=head2 load_class, reload_class
looks for a module under the registered namespaces and loads it.
=head2 load
loads and creates an instance of the specified module with extra arguments.
=head1 AUTHOR
Kenichi Ishigaki, E<lt>ishigaki at cpan.orgE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2007-2009 by Kenichi Ishigaki.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut