Froze rails gems

[depot.git] / vendor / rails / activesupport / lib / active_support / json / encoding.rb

diff --git a/vendor/rails/activesupport/lib/active_support/json/encoding.rb b/vendor/rails/activesupport/lib/active_support/json/encoding.rb
new file mode 100644 (file)
index 0000000..8650e34
--- /dev/null
+++ b/vendor/rails/activesupport/lib/active_support/json/encoding.rb
@@ -0,0 +1,37 @@
+require 'active_support/json/variable'
+require 'active_support/json/encoders/object' # Require explicitly for rdoc.
+Dir["#{File.dirname(__FILE__)}/encoders/**/*.rb"].each do |file|
+  basename = File.basename(file, '.rb')
+  unless basename == 'object'
+    require "active_support/json/encoders/#{basename}"
+  end
+end
+
+module ActiveSupport
+  module JSON
+    class CircularReferenceError < StandardError
+    end
+
+    class << self
+      REFERENCE_STACK_VARIABLE = :json_reference_stack #:nodoc:
+
+      # Converts a Ruby object into a JSON string.
+      def encode(value, options = {})
+        raise_on_circular_reference(value) do
+          value.send(:to_json, options)
+        end
+      end
+
+      protected
+        def raise_on_circular_reference(value) #:nodoc:
+          stack = Thread.current[REFERENCE_STACK_VARIABLE] ||= []
+          raise CircularReferenceError, 'object references itself' if
+            stack.include? value
+          stack << value
+          yield
+        ensure
+          stack.pop
+        end
+    end
+  end
+end