Diff from using Forwardable to replace delegating methods

gistfile1.diff

diff --git a/lib/life_game_viewer/view/life_table_model.rb b/lib/life_game_viewer/view/life_table_model.rb
index 0ee2966..6cbcba1 100644
--- a/lib/life_game_viewer/view/life_table_model.rb
+++ b/lib/life_game_viewer/view/life_table_model.rb
@@ -3,15 +3,26 @@ require 'java'
 java_import javax.swing.table.AbstractTableModel
 java_import javax.swing.JOptionPane
 
+require 'forwardable'
+
 require_relative 'generations'
 
 # This class is the model used to drive Swing's JTable.
 # It contains a LifeModel to which it delegates most calls.
 class LifeTableModel < AbstractTableModel
 
+  extend Forwardable
+
   attr_accessor :life_model
   attr_reader :generations
 
+  def_delegator :@life_model, :row_count,       :getRowCount
+  def_delegator :@life_model, :column_count,    :getColumnCount
+  def_delegator :@life_model, :number_living
+  def_delegator :@life_model, :alive?,          :getValueAt
+
+  def_delegator :@generations, :at_first_generation?
+  def_delegator :@generations, :at_last_generation?
 
   def initialize(life_model)
     super()
@@ -24,34 +35,10 @@ class LifeTableModel < AbstractTableModel
     @generations = Generations.new(life_model)
   end
 
-  def getRowCount
-    life_model.row_count
-  end
-
-  def getColumnCount
-    life_model.column_count
-  end
-
-  def getValueAt(row, col)
-    life_model.alive?(row, col)
-  end
-
   def getColumnName(colnum)
     nil
   end
 
-  def at_first_generation?
-    generations.at_first_generation?
-  end
-
-  def at_last_generation?
-    generations.at_last_generation?
-  end
-
-  def number_living
-    life_model.number_living
-  end
-
   def go_to_next_generation
     if at_last_generation?
       JOptionPane.show_message_dialog(nil, "Generation ##{generations.current_num} is the last non-repeating generation.")