gistfile1.txt

diff --git a/lib/jpmobile.rb b/lib/jpmobile.rb
index 178ad7f..7e1e72d 100644
--- a/lib/jpmobile.rb
+++ b/lib/jpmobile.rb
@@ -15,6 +15,14 @@ module Jpmobile
     autoload :Emobile,   'jpmobile/mobile/emobile'
     autoload :Willcom,   'jpmobile/mobile/willcom'
     autoload :Ddipocket, 'jpmobile/mobile/willcom'
+
+    def self.careers
+      @careers ||= constants
+    end
+
+    def self.careers= ary
+      @careers = ary
+    end
   end
 end
 
diff --git a/lib/jpmobile/mobile/abstract_mobile.rb b/lib/jpmobile/mobile/abstract_mobile.rb
index b0dc783..1bdff5c 100644
--- a/lib/jpmobile/mobile/abstract_mobile.rb
+++ b/lib/jpmobile/mobile/abstract_mobile.rb
@@ -49,7 +49,7 @@ module Jpmobile::Mobile
     end
 
     #XXX: lib/jpmobile.rbのautoloadで先に各キャリアの定数を定義しているから動くのです
-    Jpmobile::Mobile.constants.each do |career|
+    Jpmobile::Mobile.careers.each do |career|
       career_class = Jpmobile::Mobile.const_get(career)
       next if career_class == self
 
diff --git a/lib/jpmobile/request_with_mobile.rb b/lib/jpmobile/request_with_mobile.rb
index e6f944c..46f119b 100644
--- a/lib/jpmobile/request_with_mobile.rb
+++ b/lib/jpmobile/request_with_mobile.rb
@@ -33,7 +33,7 @@ module Jpmobile
     def mobile
       return @__mobile if @__mobile
 
-      Jpmobile::Mobile.constants.each do |const|
+      Jpmobile::Mobile.careers.each do |const|
         c = Jpmobile::Mobile.const_get(const)
         return @__mobile = c.new(self) if c::USER_AGENT_REGEXP && user_agent =~ c::USER_AGENT_REGEXP
       end

# on irb

require 'jpmobile'
  #=> true

Jpmobile::Mobile.careers
  #=> ["Au", "Jphone", "Docomo", "Ddipocket", "Vodafone", "Willcom", "Softbank", "AbstractMobile", "Emobile"]



Jpmobile::Mobile.careers = ["Au", "Jphone"]
  #=> ["Au", "Jphone"]

Jpmobile::Mobile.careers
  #=> ["Au", "Jphone"]