1 files changed, 35 insertions, 0 deletions
diff --git a/lib/Graph/GEXF/Role/Attributes.pm b/lib/Graph/GEXF/Role/Attributes.pm
new file mode 100644
index 0000000..644793d
--- /dev/null
+++ b/lib/Graph/GEXF/Role/Attributes.pm
@@ -0,0 +1,35 @@
+package Graph::GEXF::Role::Attributes;
+
+use MooseX::Role::Parameterized;
+
+parameter for => (
+    is       => 'ro',
+    required => 1,
+);
+
+role {
+    my $p = shift;
+
+    foreach my $type (@{$p->for}) {
+
+        my $attr_name = $type . '_attributes';
+
+        has $attr_name => (
+            traits  => ['Hash'],
+            is      => 'rw',
+            isa     => 'HashRef',
+            lazy    => 1,
+            default => sub { {} },
+            handles => {
+                'attributes_' . $type . '_total' => 'count',
+                'set_' . $type . '_attribute'    => 'set',
+                'get_' . $type . '_attribute'    => 'get',
+                'attributes_' . $type . '_list'  => 'keys',
+                'has_'.$type.'_attribute' => 'exists',
+            }
+        );
+    }
+
+};
+
+1;