Add adapters

lib/rails_api_authentication/adapter.rb

+module RailsApiAuthentication
+  module Adapter
+    def base_class
+      raise NotImplementedError
+    end
+  end
+end

lib/rails_api_authentication/adapters/active_record_adapter.rb

+require 'active_record'
+require 'rails_api_authentication/adapter'
+
+module RailsApiAuthentication
+  module Adapters
+    class ActiveRecordAdapter
+      extend RailsApiAuthentication::Adapter
+
+      def self.base_class
+        ::ActiveRecord::Base
+      end
+    end
+  end
+end

lib/rails_api_authentication/adapters/mongoid_adapter.rb

+require 'mongoid'
+require 'rails_api_authentication/adapter'
+
+module RailsApiAuthentication
+  module Adapters
+    class MongoidAdapter
+      extend RailsApiAuthentication::Adapter
+
+      def self.base_class
+        ::Mongoid::Document
+      end
+    end
+  end
+end

lib/rails_api_authentication/adapters/rails_adapter.rb

+require 'action_controller'
+require 'rails_api_authentication/adapter'
+
+module RailsApiAuthentication
+  module Adapters
+    class RailsAdapter
+      extend RailsApiAuthentication::Adapter
+
+      def self.base_class
+        ::ActionController::Base
+      end
+    end
+  end
+end

lib/rails_api_authentication/adapters/rails_api_adapter.rb

+require 'action_controller'
+require 'rails_api_authentication/adapter'
+
+module RailsApiAuthentication
+  module Adapters
+    class RailsAPIAdapter
+      extend RailsApiAuthentication::Adapter
+
+      def self.base_class
+        ::ActionController::API
+      end
+    end
+
+    # make the adpater available even if the 'API' acronym is not defined
+    RailsApiAdapter = RailsAPIAdapter
+  end
+end
+

lib/rails_api_authentication/adapters/rails_metal_adapter.rb

+require 'action_controller'
+require 'rails_api_authentication/adapter'
+
+module RailsApiAuthentication
+  module Adapters
+    class RailsMetalAdapter
+      extend RailsApiAuthentication::Adapter
+
+      def self.base_class
+        ::ActionController::Metal
+      end
+    end
+  end
+end