From: Stevan Little <stevan.little@iinteractive.com>
Date: Fri, 1 Jun 2007 16:12:49 +0000 (+0000)
Subject: adding Role/Class support for method providers
X-Git-Tag: 0.18_01~74
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=8e3fab6d99875597bfae0e77329ec7516a7ff5df;p=gitmo%2FMooseX-AttributeHelpers.git

adding Role/Class support for method providers
---

diff --git a/lib/MooseX/AttributeHelpers/Base.pm b/lib/MooseX/AttributeHelpers/Base.pm
index 533c083..e195198 100644
--- a/lib/MooseX/AttributeHelpers/Base.pm
+++ b/lib/MooseX/AttributeHelpers/Base.pm
@@ -8,18 +8,45 @@ our $AUTHORITY = 'cpan:STEVAN';
 
 extends 'Moose::Meta::Attribute';
 
-has 'method_constructors' => (
-    is      => 'ro',
-    isa     => 'HashRef',
-    default => sub { {} }
-);
-
+# this is the method map you define ...
 has 'provides' => (
     is       => 'ro',
     isa      => 'HashRef',
     required => 1,
 );
 
+
+# these next two are the possible methods 
+# you can use in the 'provides' map.
+
+# provide a Class or Role which we can 
+# collect the method providers from 
+has 'method_provider' => (
+    is        => 'ro',
+    isa       => 'ClassName',
+    predicate => 'has_method_provider',
+);
+
+# or you can provide a HASH ref of anon subs
+# yourself. This will also collect and store
+# the methods from a method_provider as well 
+has 'method_constructors' => (
+    is      => 'ro',
+    isa     => 'HashRef',
+    lazy    => 1,
+    default => sub {
+        my $self = shift;
+        return +{} unless $self->has_method_provider;
+        # or grab them from the role/class
+        my $method_provider = $self->method_provider->meta;
+        return +{
+            map { 
+                $_ => $method_provider->get_method($_)
+            } $method_provider->get_method_list
+        };            
+    }
+);
+
 # extend the parents stuff to make sure 
 # certain bits are now required ...
 has '+$!default'       => (required => 1);
@@ -60,7 +87,9 @@ before '_process_options' => sub {
 # all valid possibilities in it
 sub check_provides_values {
     my $self = shift;
+    
     my $method_constructors = $self->method_constructors;
+    
     foreach my $key (keys %{$self->provides}) {
         (exists $method_constructors->{$key})
             || confess "$key is an unsupported method type";
diff --git a/lib/MooseX/AttributeHelpers/Counter.pm b/lib/MooseX/AttributeHelpers/Counter.pm
index 0ab0d71..0f196ad 100644
--- a/lib/MooseX/AttributeHelpers/Counter.pm
+++ b/lib/MooseX/AttributeHelpers/Counter.pm
@@ -5,24 +5,15 @@ use Moose;
 our $VERSION   = '0.01';
 our $AUTHORITY = 'cpan:STEVAN';
 
-extends 'MooseX::AttributeHelpers::Base';
+use MooseX::AttributeHelpers::MethodProvider::Counter;
 
-sub helper_type { 'Num' }
+extends 'MooseX::AttributeHelpers::Base';
 
-has '+method_constructors' => (
-    default => sub {
-        return +{
-            inc => sub {
-                my $attr = shift;
-                return sub { $attr->set_value($_[0], $attr->get_value($_[0]) + 1) };
-            },
-            dec => sub {
-                my $attr = shift;
-                return sub { $attr->set_value($_[0], $attr->get_value($_[0]) - 1) };        
-            },
-        }
-    }
+has '+method_provider' => (
+    default => 'MooseX::AttributeHelpers::MethodProvider::Counter'
 );
+
+sub helper_type { 'Num' }
     
 no Moose;
 
diff --git a/lib/MooseX/AttributeHelpers/MethodProvider/Counter.pm b/lib/MooseX/AttributeHelpers/MethodProvider/Counter.pm
new file mode 100644
index 0000000..ca85b04
--- /dev/null
+++ b/lib/MooseX/AttributeHelpers/MethodProvider/Counter.pm
@@ -0,0 +1,21 @@
+
+package MooseX::AttributeHelpers::MethodProvider::Counter;
+use Moose::Role;
+
+sub inc {
+    my $attr = shift;
+    return sub { $attr->set_value($_[0], $attr->get_value($_[0]) + 1) };
+}
+
+sub dec {
+    my $attr = shift;
+    return sub { $attr->set_value($_[0], $attr->get_value($_[0]) - 1) };        
+}
+
+1;
+
+__END__
+
+=pod
+
+=cut
\ No newline at end of file