lib/hanami/view/exposure.rb in hanami-view-2.0.0.alpha8 vs lib/hanami/view/exposure.rb in hanami-view-2.1.0.beta1

@@ -28,38 +28,44 @@
       def bind(obj)
         self.class.new(name, proc, obj, **options)
       end
 
       def dependency_names
-        if proc
-          proc.parameters.each_with_object([]) { |(type, name), names|
-            names << name if EXPOSURE_DEPENDENCY_PARAMETER_TYPES.include?(type)
-          }
-        else
-          []
-        end
+        @dependency_names ||=
+          if proc
+            proc.parameters.each_with_object([]) { |(type, name), names|
+              names << name if EXPOSURE_DEPENDENCY_PARAMETER_TYPES.include?(type)
+            }
+          else
+            []
+          end
       end
 
+      def dependencies?
+        !dependency_names.empty?
+      end
+
       def input_keys
-        if proc
-          proc.parameters.each_with_object([]) { |(type, name), keys|
-            keys << name if INPUT_PARAMETER_TYPES.include?(type)
-          }
-        else
-          []
-        end
+        @input_keys ||=
+          if proc
+            proc.parameters.each_with_object([]) { |(type, name), keys|
+              keys << name if INPUT_PARAMETER_TYPES.include?(type)
+            }
+          else
+            []
+          end
       end
 
       def for_layout?
-        options.fetch(:layout) { false }
+        options.fetch(:layout, false)
       end
 
       def decorate?
-        options.fetch(:decorate) { true }
+        options.fetch(:decorate, true)
       end
 
       def private?
-        options.fetch(:private) { false }
+        options.fetch(:private, false)
       end
 
       def default_value
         options[:default]
       end