Converted this extension to use MetaRole

[gitmo/MooseX-Singleton.git] / lib / MooseX / Singleton / Role / Object.pm

diff --git a/lib/MooseX/Singleton/Role/Object.pm b/lib/MooseX/Singleton/Role/Object.pm
new file mode 100644 (file)
index 0000000..b09613f
--- /dev/null
+++ b/lib/MooseX/Singleton/Role/Object.pm
@@ -0,0 +1,51 @@
+#!/usr/bin/env perl
+package MooseX::Singleton::Role::Object;
+use Moose::Role;
+
+sub instance { shift->new }
+
+sub initialize {
+  my ($class, @args) = @_;
+
+  my $existing = $class->meta->existing_singleton;
+  confess "Singleton is already initialized" if $existing;
+
+  return $class->SUPER::new(@args);
+}
+
+override new => sub {
+  my ($class, @args) = @_;
+
+  my $existing = $class->meta->existing_singleton;
+  confess "Singleton is already initialized" if $existing and @args;
+
+  # Otherwise BUILD will be called repeatedly on the existing instance.
+  # -- rjbs, 2008-02-03
+  return $existing if $existing and ! @args;
+
+  return super();
+};
+
+sub _clear_instance {
+  my ($class) = @_;
+  $class->meta->clear_singleton;
+}
+
+no Moose;
+
+1;
+
+__END__
+
+=pod
+
+=head1 NAME
+
+MooseX::Singleton::Object - Object class role for MooseX::Singleton
+
+=head1 DESCRIPTION
+
+This just adds C<instance> as a shortcut for C<new>.
+
+=cut
+