A tiny tweak

[gitmo/Mouse.git] / lib / Mouse / Meta / Module.pm

diff --git a/lib/Mouse/Meta/Module.pm b/lib/Mouse/Meta/Module.pm
index 01d42c1..fa99e17 100755 (executable)
--- a/lib/Mouse/Meta/Module.pm
+++ b/lib/Mouse/Meta/Module.pm
@@ -2,13 +2,74 @@ package Mouse::Meta::Module;
 use strict;
 use warnings;
 
-use Scalar::Util qw/blessed weaken/;
-use Mouse::Util qw/version authority identifier get_code_info/;
-use Carp 'confess';
+use Mouse::Util qw/get_code_info not_supported/;
+use Scalar::Util qw/blessed/;
+
+
+{
+    my %METACLASS_CACHE;
+
+    # because Mouse doesn't introspect existing classes, we're forced to
+    # only pay attention to other Mouse classes
+    sub _metaclass_cache {
+        my($class, $name) = @_;
+        return $METACLASS_CACHE{$name};
+    }
+
+    sub initialize {
+        my($class, $package_name, @args) = @_;
+
+        ($package_name && !ref($package_name))\r
+            || $class->throw_error("You must pass a package name and it cannot be blessed");\r
+
+        return $METACLASS_CACHE{$package_name}
+            ||= $class->_new(package => $package_name, @args);
+    }
+
+    sub Mouse::class_of{
+        my($class_or_instance) = @_;
+        return undef unless defined $class_or_instance;
+        return $METACLASS_CACHE{ blessed($class_or_instance) || $class_or_instance };
+    }
+
+    # Means of accessing all the metaclasses that have
+    # been initialized thus far
+    sub get_all_metaclasses         {        %METACLASS_CACHE         }
+    sub get_all_metaclass_instances { values %METACLASS_CACHE         }
+    sub get_all_metaclass_names     { keys   %METACLASS_CACHE         }
+    sub get_metaclass_by_name       { $METACLASS_CACHE{$_[0]}         }
+    sub store_metaclass_by_name     { $METACLASS_CACHE{$_[0]} = $_[1] }
+    sub weaken_metaclass            { weaken($METACLASS_CACHE{$_[0]}) }
+    sub does_metaclass_exist        { defined $METACLASS_CACHE{$_[0]} }
+    sub remove_metaclass_by_name    { delete $METACLASS_CACHE{$_[0]}  }
+
+}
+
+sub meta{ Mouse::Meta::Class->initialize(ref $_[0] || $_[0]) }
+
+sub _new{ Carp::croak("Mouse::Meta::Module is an abstract class") }
 
 sub name { $_[0]->{package} }
 sub _method_map{ $_[0]->{methods} }
 
+sub version   { no strict 'refs'; ${shift->name.'::VERSION'}   }
+sub authority { no strict 'refs'; ${shift->name.'::AUTHORITY'} }
+sub identifier {
+    my $self = shift;
+    return join '-' => (
+        $self->name,
+        ($self->version   || ()),
+        ($self->authority || ()),
+    );
+}
+
+# add_attribute is an abstract method
+
+sub get_attribute_map {        $_[0]->{attributes}          }
+sub has_attribute     { exists $_[0]->{attributes}->{$_[1]} }
+sub get_attribute     {        $_[0]->{attributes}->{$_[1]} }
+sub get_attribute_list{ keys %{$_[0]->{attributes}}         }
+
 sub namespace{
     my $name = $_[0]->{package};
     no strict 'refs';
@@ -19,10 +80,10 @@ sub add_method {
     my($self, $name, $code) = @_;
 
     if(!defined $name){
-        confess "You must pass a defined name";
+        $self->throw_error("You must pass a defined name");
     }
     if(ref($code) ne 'CODE'){
-        confess "You must pass a CODE reference";
+        not_supported 'add_method for a method object';
     }
 
     $self->_method_map->{$name}++; # Moose stores meta object here.
@@ -51,7 +112,9 @@ sub has_method {
     return $code && $self->_code_is_mine($code);
 }
 
-
+sub get_method{
+    Carp::croak("get_method() is not yet implemented");
+}
 
 sub get_method_list {\r
     my($self) = @_;
@@ -59,14 +122,19 @@ sub get_method_list {
     return grep { $self->has_method($_) } keys %{ $self->namespace };\r
 }
 
-sub get_attribute_map { $_[0]->{attributes} }
-sub has_attribute     { exists $_[0]->{attributes}->{$_[1]} }
-sub get_attribute     { $_[0]->{attributes}->{$_[1]} }
-sub get_attribute_list {
-    my $self = shift;
-    keys %{$self->get_attribute_map};
-}
+sub throw_error{
+    my($class, $message, %args) = @_;
+
+    local $Carp::CarpLevel  = $Carp::CarpLevel + 1 + ($args{depth} || 0);
+    local $Carp::MaxArgNums = 20; # default is 8, usually we use named args which gets messier though\r
 
+    if(exists $args{longmess} && !$args{longmess}){ # intentionaly longmess => 0
+        Carp::croak($message);
+    }
+    else{
+        Carp::confess($message);
+    }
+}
 
 1;