1 files changed, 43 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/support/class_attribute_accessors.rb b/activerecord/lib/active_record/support/class_attribute_accessors.rb
new file mode 100644
index 0000000000..0e269165a6
--- /dev/null
+++ b/activerecord/lib/active_record/support/class_attribute_accessors.rb
@@ -0,0 +1,43 @@
+# attr_* style accessors for class-variables that can accessed both on an instance and class level.
+class Class #:nodoc:
+  def cattr_reader(*syms)
+    syms.each do |sym|
+      class_eval <<-EOS
+        if ! defined? @@#{sym.id2name}
+          @@#{sym.id2name} = nil
+        end
+        
+        def self.#{sym.id2name}
+          @@#{sym}
+        end
+
+        def #{sym.id2name}
+          self.class.#{sym.id2name}
+        end
+      EOS
+    end
+  end
+  
+  def cattr_writer(*syms)
+    syms.each do |sym|
+      class_eval <<-EOS
+        if ! defined? @@#{sym.id2name}
+          @@#{sym.id2name} = nil
+        end
+        
+        def self.#{sym.id2name}=(obj)
+          @@#{sym.id2name} = obj
+        end
+
+        def #{sym.id2name}=(obj)
+          self.class.#{sym.id2name}=(obj)
+        end
+      EOS
+    end
+  end
+  
+  def cattr_accessor(*syms)
+    cattr_reader(*syms)
+    cattr_writer(*syms)
+  end  
+end
+\ No newline at end of file