Add Rubella::Input::Base

Add a base class for Inputs so we have an interface for this.
Use this interface in Rubella::Input::JSON.

lib/rubella/input/base.rb

@@ -0,0 +1,44 @@
+module Rubella
+  module Input
+
+    # Gets the rwa data and translate it into a by the Rubella::Weighting::Base
+    # class readable format.
+    # This must be an array within subarrays, which have all the same lenght
+    # and contains only numeric data.
+    #
+    # TODO The validation of the data should happen here
+    # Check if data is array, with subarrays. Check, that all sub array have
+    # the same size. Check that all the content are numeric values between 0
+    # and 100.
+    #
+    class Base
+      attr_reader :data
+
+      # Constructor
+      # Creates a new Rubella::Input::Base object, from the given data.
+      #
+      # @param value string A string, which contains the data
+      # @return Rubella::Input::Base
+      #
+      def self.string(value)
+        raise NotImplementedError "Please override 'self.string' in your "+
+          "concrete implementation"
+      end
+
+      # Constructor
+      # Creates a new Rubella::Input::Base object, from the given file.
+      # Only the file name is required.
+      #
+      # @param file_name string The name of the file
+      # @return Rubella:Input::Base
+      #
+      def self.file(file_name)
+        raise NotImplementedError "Please override 'self.file' in your "+
+          "concrete implementation"
+      end
+
+
+    end
+
+  end
+end

lib/rubella/input/json.rb

@@ -1,3 +1,4 @@
+require 'rubella/input/base'
 require 'json'
 
 module Rubella
@@ -6,13 +7,7 @@ module Rubella
     # Gets data in JSON formate and translate it into a Ruby readable form to
     # make it possible to handle the data.
     #
-    # TODO The validation of the data should happen here
-    # Check if data is array, with subarrays. Check, that all sub array have
-    # the same size. Check that all the content are numeric values between 0
-    # and 100.
-    #
-    class JSON
-      attr_reader :data
+    class JSON < Base
 
       # Constructor
       # This constructer can create a new Rubella::Input::JSON object, but it
@@ -21,6 +16,7 @@ module Rubella
       #
       # @param json__string string A string, which contains the data as json
       # @return Rubella::Input::JSON
+      #
       def initialize(json_string)
         @data = ::JSON::load(json_string)
       end
@@ -40,6 +36,7 @@ module Rubella
       #
       # @param json_file string The name of the file, which json contains
       # @return Rubella:Input::JSON
+      #
       def self.file(json_file)
         self.new File.new(json_file, 'r')
       end

lib/rubella/output/ascii.rb

@@ -100,4 +100,4 @@ module Rubella
     end
 
   end
-end
+end

lib/rubella/output/base.rb

@@ -35,4 +35,4 @@ module Rubella
     end
 
   end
-end
+end