1 files changed, 60 insertions, 13 deletions

diff --git a/actionpack/lib/action_controller/abstract/base.rb b/actionpack/lib/action_controller/abstract/base.rb
index 39e9ad0440..ab9aed0b26 100644
--- a/actionpack/lib/action_controller/abstract/base.rb
+++ b/actionpack/lib/action_controller/abstract/base.rb
@@ -1,38 +1,85 @@
 module AbstractController
   class Base
+    
     attr_internal :response_body
     attr_internal :response_obj
     attr_internal :action_name
 
-    def self.process(action)
-      new.process(action)
-    end
+    class << self
+      attr_reader :abstract    
+      
+      def abstract!
+        @abstract = true
+      end
+      
+      alias_method :abstract?, :abstract
+      
+      def internal_methods
+        controller = self
+        controller = controller.superclass until controller.abstract?
+        controller.public_instance_methods(true)
+      end
+      
+      def process(action)
+        new.process(action.to_s)
+      end
 
-    def self.inherited(klass)
+      def hidden_actions
+        []
+      end
+      
+      def action_methods
+        @action_methods ||=
+          # All public instance methods of this class, including ancestors
+          public_instance_methods(true).map { |m| m.to_s }.to_set -
+          # Except for public instance methods of Base and its ancestors
+          internal_methods.map { |m| m.to_s } +
+          # Be sure to include shadowed public instance methods of this class
+          public_instance_methods(false).map { |m| m.to_s } -
+          # And always exclude explicitly hidden actions
+          hidden_actions
+      end
     end
-
+    
+    abstract!
+    
     def initialize
       self.response_obj = {}
     end
-
+    
     def process(action_name)
       unless respond_to_action?(action_name)
         raise ActionNotFound, "The action '#{action_name}' could not be found"
       end
-
+      
       @_action_name = action_name
       process_action
-      self.response_obj[:body] = self.response_body
       self
     end
-
+    
   private
+  
+    def action_methods
+      self.class.action_methods
+    end
+  
+    # It is possible for respond_to?(action_name) to be false and
+    # respond_to?(:action_missing) to be false if respond_to_action?
+    # is overridden in a subclass. For instance, ActionController::Base
+    # overrides it to include the case where a template matching the
+    # action_name is found.
     def process_action
-      respond_to?(action_name) ? send(action_name) : send(:action_missing, action_name)
+      if respond_to?(action_name) then send(action_name)
+      elsif respond_to?(:action_missing, true) then action_missing(action_name)
+      end
     end
-
+    
+    # Override this to change the conditions that will raise an
+    # ActionNotFound error. If you accept a difference case,
+    # you must handle it by also overriding process_action and
+    # handling the case.
     def respond_to_action?(action_name)
-      respond_to?(action_name) || respond_to?(:action_missing, true)
+      action_methods.include?(action_name) || respond_to?(:action_missing, true)
     end
   end
-end
+end
\ No newline at end of file