lib/parameters/parameters.rb in parameters-0.1.8 vs lib/parameters/parameters.rb in parameters-0.1.9

@@ -1,169 +1,14 @@
 require 'parameters/exceptions'
+require 'parameters/class_methods'
 require 'parameters/class_param'
 require 'parameters/instance_param'
 require 'parameters/exceptions'
 require 'parameters/extensions/meta'
 
 module Parameters
   def self.included(base)
-    base.metaclass_eval do
-      #
-      # @return [Hash]
-      #   Parameters for the class.
-      #
-      def params
-        @params ||= {}
-      end
-
-      #
-      # Sets the values of the class parameters.
-      #
-      # @param [Hash] values
-      #   The names and new values to set the class params to.
-      #
-      # @example
-      #   Test.params = {:x => 5, :y => 2}
-      #   # => {:x=>5, :y=>2}
-      #
-      def params=(values)
-        values.each do |name,value|
-          if has_param?(name)
-            if (value.kind_of?(Parameters::ClassParam) || value.kind_of?(Parameters::InstanceParam))
-              value = value.value
-            end
-
-            get_param(name).value = value
-          end
-        end
-      end
-
-      #
-      # Adds a new parameters to the class.
-      #
-      # @param [Symbol, String] name
-      #   The name of the new parameter.
-      #
-      # @param [Hash] options
-      #   Additional options.
-      #
-      # @option options [String] :description
-      #   The description for the new parameter.
-      #
-      # @option options [Object, Proc] :default
-      #   The default value for the new parameter.
-      #
-      # @example
-      #   parameter 'var'
-      #
-      # @example
-      #   parameter 'var', :default => 3, :description => 'my variable' 
-      #
-      def parameter(name,options={})
-        name = name.to_sym
-
-        # add the parameter to the class params list
-        params[name] = Parameters::ClassParam.new(name,options[:description],options[:default])
-
-        # define the reader class method for the parameter
-        meta_def(name) do
-          params[name].value
-        end
-
-        # define the writer class method for the parameter
-        meta_def("#{name}=") do |value|
-          params[name].value = value
-        end
-
-        # define the getter/setter instance methods for the parameter
-        attr_accessor(name)
-      end
-
-      #
-      # Searches for the class parameter with the matching name.
-      #
-      # @param [Symbol, String] name
-      #   The class parameter name to search for.
-      #
-      # @return [ClassParam]
-      #   The class parameter with the matching _name_.
-      #
-      # @raise [ParamNotFound]
-      #   No class parameter with the specified _name_ could be found.
-      #
-      def get_param(name)
-        name = name.to_sym
-
-        ancestors.each do |ancestor|
-          if ancestor.include?(Parameters)
-            if ancestor.params.has_key?(name)
-              return ancestor.params[name]
-            end
-          end
-        end
-
-        raise(Parameters::ParamNotFound,"parameter #{name.to_s.dump} was not found in class #{self.name.dump}",caller)
-      end
-
-      #
-      # @return [Boolean]
-      #   Specifies whether or not there is a class parameter with the
-      #   specified _name_.
-      #
-      def has_param?(name)
-        name = name.to_sym
-
-        ancestors.each do |ancestor|
-          if ancestor.include?(Parameters)
-            return true if ancestor.params.has_key?(name)
-          end
-        end
-
-        return false
-      end
-
-      #
-      # Iterates over the parameters of the class and it's ancestors.
-      #
-      # @yield [param]
-      #   The block that will be passed each class parameter.
-      #
-      def each_param(&block)
-        ancestors.each do |ancestor|
-          if ancestor.include?(Parameters)
-            ancestor.params.each_value(&block)
-          end
-        end
-
-        return self
-      end
-
-      #
-      # Returns the description of the class parameters with a given name.
-      #
-      # @return [String]
-      #   Description of the class parameter with the specified name.
-      #
-      # @raise [ParamNotFound]
-      #   No class parameter with the specified name could be found.
-      #
-      def describe_param(name)
-        get_param(name).description
-      end
-
-      #
-      # Returns the value of the class parameters with a given name.
-      #
-      # @return [Object]
-      #   Value of the class parameter with the specified name.
-      #
-      # @raise [ParamNotFound]
-      #   No class parameter with the specified name could be found.
-      #
-      def param_value(name)
-        get_param(name).value
-      end
-    end
+    base.extend ClassMethods
   end
 
   #
   # Initalizes the parameters of the object using the given
   # values, which can override the default values of parameters.