Merge commit 'mainstream/master'

53 files changed, 277 insertions, 125 deletions

diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb
index 4b2eebb007..feb6b1f2cf 100644
--- a/activesupport/lib/active_support/cache.rb
+++ b/activesupport/lib/active_support/cache.rb
@@ -2,6 +2,7 @@ require 'benchmark'
 require 'active_support/core_ext/benchmark'
 require 'active_support/core_ext/exception'
 require 'active_support/core_ext/class/attribute_accessors'
+require 'active_support/core_ext' # FIXME: pulling in all to_param extensions
 
 module ActiveSupport
   # See ActiveSupport::Cache::Store for documentation.
diff --git a/activesupport/lib/active_support/cache/strategy/local_cache.rb b/activesupport/lib/active_support/cache/strategy/local_cache.rb
index 84d9a0e6d8..4bbcd8e4c4 100644
--- a/activesupport/lib/active_support/cache/strategy/local_cache.rb
+++ b/activesupport/lib/active_support/cache/strategy/local_cache.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/duplicable'
+
 module ActiveSupport
   module Cache
     module Strategy
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb
index 4bac8292e2..f049189b9a 100644
--- a/activesupport/lib/active_support/callbacks.rb
+++ b/activesupport/lib/active_support/callbacks.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/array/extract_options'
+
 module ActiveSupport
   # Callbacks are hooks into the lifecycle of an object that allow you to trigger logic
   # before or after an alteration of the object state.
diff --git a/activesupport/lib/active_support/core_ext/array/conversions.rb b/activesupport/lib/active_support/core_ext/array/conversions.rb
index 81e466779e..5f1ce4142f 100644
--- a/activesupport/lib/active_support/core_ext/array/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/array/conversions.rb
@@ -1,3 +1,7 @@
+require 'active_support/core_ext/hash/keys'
+require 'active_support/core_ext/hash/reverse_merge'
+require 'active_support/inflector'
+
 class Array
   # Converts the array to a comma-separated sentence where the last element is joined by the connector word. Options:
   # * <tt>:words_connector</tt> - The sign or word used to join the elements in arrays with two or more elements (default: ", ")
@@ -155,7 +159,7 @@ class Array
     raise "Not all elements respond to to_xml" unless all? { |e| e.respond_to? :to_xml }
     require 'builder' unless defined?(Builder)
 
-    options[:root]     ||= all? { |e| e.is_a?(first.class) && first.class.to_s != "Hash" } ? first.class.to_s.underscore.pluralize : "records"
+    options[:root]     ||= all? { |e| e.is_a?(first.class) && first.class.to_s != "Hash" } ? ActiveSupport::Inflector.pluralize(ActiveSupport::Inflector.underscore(first.class.name)) : "records"
     options[:children] ||= options[:root].singularize
     options[:indent]   ||= 2
     options[:builder]  ||= Builder::XmlMarkup.new(:indent => options[:indent])
diff --git a/activesupport/lib/active_support/core_ext/class/attribute_accessors.rb b/activesupport/lib/active_support/core_ext/class/attribute_accessors.rb
index 75e481fc54..74ce85a1c2 100644
--- a/activesupport/lib/active_support/core_ext/class/attribute_accessors.rb
+++ b/activesupport/lib/active_support/core_ext/class/attribute_accessors.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/array/extract_options'
+
 # Extends the class object with class and instance accessors for class attributes,
 # just like the native attr* accessors for instance attributes.
 #
diff --git a/activesupport/lib/active_support/core_ext/class/delegating_attributes.rb b/activesupport/lib/active_support/core_ext/class/delegating_attributes.rb
index b0784d8416..fd029544c3 100644
--- a/activesupport/lib/active_support/core_ext/class/delegating_attributes.rb
+++ b/activesupport/lib/active_support/core_ext/class/delegating_attributes.rb
@@ -1,4 +1,4 @@
-require 'active_support/core_ext/blank'
+require 'active_support/core_ext/object/blank'
 
 class Class
   def superclass_delegating_reader(*names)
diff --git a/activesupport/lib/active_support/core_ext/class/inheritable_attributes.rb b/activesupport/lib/active_support/core_ext/class/inheritable_attributes.rb
index 2f18666ab9..cca93a0b9f 100644
--- a/activesupport/lib/active_support/core_ext/class/inheritable_attributes.rb
+++ b/activesupport/lib/active_support/core_ext/class/inheritable_attributes.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/duplicable'
+
 # Retain for backward compatibility.  Methods are now included in Class.
 module ClassInheritableAttributes # :nodoc:
 end
@@ -216,4 +218,4 @@ class Class
     extlib_inheritable_reader(*syms)
     extlib_inheritable_writer(*syms)
   end
-end
\ No newline at end of file
+end
diff --git a/activesupport/lib/active_support/core_ext/class/removal.rb b/activesupport/lib/active_support/core_ext/class/removal.rb
index 10660edb2c..2dea3c24d5 100644
--- a/activesupport/lib/active_support/core_ext/class/removal.rb
+++ b/activesupport/lib/active_support/core_ext/class/removal.rb
@@ -1,3 +1,6 @@
+require 'active_support/core_ext/object/extending'
+require 'active_support/core_ext/module/introspection'
+
 class Class #:nodoc:
   
   # Unassociates the class with its subclasses and removes the subclasses
diff --git a/activesupport/lib/active_support/core_ext/date/calculations.rb b/activesupport/lib/active_support/core_ext/date/calculations.rb
index 59efdbd1b6..04a32edefd 100644
--- a/activesupport/lib/active_support/core_ext/date/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/date/calculations.rb
@@ -1,3 +1,5 @@
+require 'active_support/duration'
+
 class Date
   class << self
     # Returns a new Date representing the date 1 day ago (i.e. yesterday's date).
diff --git a/activesupport/lib/active_support/core_ext/date/conversions.rb b/activesupport/lib/active_support/core_ext/date/conversions.rb
index f6c870035b..54facf4430 100644
--- a/activesupport/lib/active_support/core_ext/date/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/date/conversions.rb
@@ -1,4 +1,6 @@
 require 'active_support/inflector'
+require 'active_support/core_ext/time/conversions'
+require 'active_support/core_ext/date_time/conversions'
 
 class Date
   DATE_FORMATS = {
diff --git a/activesupport/lib/active_support/core_ext/date_time.rb b/activesupport/lib/active_support/core_ext/date_time.rb
index 83a11da1c7..004fd0ad29 100644
--- a/activesupport/lib/active_support/core_ext/date_time.rb
+++ b/activesupport/lib/active_support/core_ext/date_time.rb
@@ -1,5 +1,4 @@
-require 'date'
-
+require 'active_support/core_ext/time'
 require 'active_support/core_ext/date_time/acts_like'
 require 'active_support/core_ext/date_time/calculations'
 require 'active_support/core_ext/date_time/conversions'
diff --git a/activesupport/lib/active_support/core_ext/hash/conversions.rb b/activesupport/lib/active_support/core_ext/hash/conversions.rb
index fa171720f9..f9dddec687 100644
--- a/activesupport/lib/active_support/core_ext/hash/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/hash/conversions.rb
@@ -1,6 +1,8 @@
 require 'date'
 require 'active_support/core_ext/object/conversions'
 require 'active_support/core_ext/array/conversions'
+require 'active_support/core_ext/hash/reverse_merge'
+require 'active_support/core/time'
 
 class Hash
   # This module exists to decorate files deserialized using Hash.from_xml with
diff --git a/activesupport/lib/active_support/core_ext/logger.rb b/activesupport/lib/active_support/core_ext/logger.rb
index 858da7aa07..22749229a3 100644
--- a/activesupport/lib/active_support/core_ext/logger.rb
+++ b/activesupport/lib/active_support/core_ext/logger.rb
@@ -1,6 +1,7 @@
-# Adds the 'around_level' method to Logger.
+require 'active_support/core_ext/class/attribute_accessors'
 
-class Logger
+# Adds the 'around_level' method to Logger.
+class Logger #:nodoc:
   def self.define_around_helper(level)
     module_eval <<-end_eval
       def around_#{level}(before_message, after_message, &block)  # def around_debug(before_message, after_message, &block)
diff --git a/activesupport/lib/active_support/core_ext/module/attr_internal.rb b/activesupport/lib/active_support/core_ext/module/attr_internal.rb
index b66c0d7500..d052bfed2d 100644
--- a/activesupport/lib/active_support/core_ext/module/attr_internal.rb
+++ b/activesupport/lib/active_support/core_ext/module/attr_internal.rb
@@ -22,11 +22,11 @@ class Module
 
   alias_method :attr_internal, :attr_internal_accessor
 
-  private
-    mattr_accessor :attr_internal_naming_format
-    self.attr_internal_naming_format = '@_%s'
+  class << self; attr_accessor :attr_internal_naming_format end
+  self.attr_internal_naming_format = '@_%s'
 
+  private
     def attr_internal_ivar_name(attr)
-      attr_internal_naming_format % attr
+      Module.attr_internal_naming_format % attr
     end
 end
diff --git a/activesupport/lib/active_support/core_ext/module/introspection.rb b/activesupport/lib/active_support/core_ext/module/introspection.rb
index 7708d573fa..23a1063901 100644
--- a/activesupport/lib/active_support/core_ext/module/introspection.rb
+++ b/activesupport/lib/active_support/core_ext/module/introspection.rb
@@ -1,3 +1,5 @@
+require 'active_support/inflector'
+
 class Module
   # Returns the name of the module containing this one.
   #
@@ -26,7 +28,7 @@ class Module
   #   p Module.new.parent # => Object
   #
   def parent
-    parent_name ? parent_name.constantize : Object
+    parent_name ? ActiveSupport::Inflector.constantize(parent_name) : Object
   end
 
   # Returns all the parents of this module according to its name, ordered from
@@ -47,7 +49,7 @@ class Module
     if parent_name
       parts = parent_name.split('::')
       until parts.empty?
-        parents << (parts * '::').constantize
+        parents << ActiveSupport::Inflector.constantize(parts * '::')
         parts.pop
       end
     end
diff --git a/activesupport/lib/active_support/core_ext/module/model_naming.rb b/activesupport/lib/active_support/core_ext/module/model_naming.rb
index 004b96a3c1..36fde87b23 100644
--- a/activesupport/lib/active_support/core_ext/module/model_naming.rb
+++ b/activesupport/lib/active_support/core_ext/module/model_naming.rb
@@ -1,13 +1,15 @@
+require 'active_support/inflector'
+
 module ActiveSupport
   class ModelName < String
     attr_reader :singular, :plural, :cache_key, :partial_path
 
     def initialize(name)
       super
-      @singular = underscore.tr('/', '_').freeze
-      @plural = @singular.pluralize.freeze
+      @singular = ActiveSupport::Inflector.underscore(self).tr('/', '_').freeze
+      @plural = ActiveSupport::Inflector.pluralize(@singular).freeze
       @cache_key = tableize.freeze
-      @partial_path = "#{@cache_key}/#{demodulize.underscore}".freeze
+      @partial_path = "#{@cache_key}/#{ActiveSupport::Inflector.underscore(ActiveSupport::Inflector.demodulize(self))}".freeze
     end
   end
 end
diff --git a/activesupport/lib/active_support/core_ext/module/synchronization.rb b/activesupport/lib/active_support/core_ext/module/synchronization.rb
index 069db3fed0..f72d512340 100644
--- a/activesupport/lib/active_support/core_ext/module/synchronization.rb
+++ b/activesupport/lib/active_support/core_ext/module/synchronization.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/module/aliasing'
+
 class Module
   # Synchronize access around a method, delegating synchronization to a
   # particular mutex. A mutex (either a Mutex, or any object that responds to 
diff --git a/activesupport/lib/active_support/core_ext/numeric/time.rb b/activesupport/lib/active_support/core_ext/numeric/time.rb
index 2955e8ff1d..d1062805c5 100644
--- a/activesupport/lib/active_support/core_ext/numeric/time.rb
+++ b/activesupport/lib/active_support/core_ext/numeric/time.rb
@@ -1,3 +1,5 @@
+require 'active_support/duration'
+
 class Numeric
   # Enables the use of time calculations and declarations, like 45.minutes + 2.hours + 4.years.
   #
diff --git a/activesupport/lib/active_support/core_ext/object.rb b/activesupport/lib/active_support/core_ext/object.rb
index 96385d2b87..04e8f06b3d 100644
--- a/activesupport/lib/active_support/core_ext/object.rb
+++ b/activesupport/lib/active_support/core_ext/object.rb
@@ -1,3 +1,4 @@
+require 'active_support/core_ext/object/acts_like'
 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/object/duplicable'
 require 'active_support/core_ext/object/try'
diff --git a/activesupport/lib/active_support/core_ext/range/blockless_step.rb b/activesupport/lib/active_support/core_ext/range/blockless_step.rb
index f4792d03b7..db42ef5c47 100644
--- a/activesupport/lib/active_support/core_ext/range/blockless_step.rb
+++ b/activesupport/lib/active_support/core_ext/range/blockless_step.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/module/aliasing'
+
 class Range
   begin
     (1..2).step
diff --git a/activesupport/lib/active_support/core_ext/string/conversions.rb b/activesupport/lib/active_support/core_ext/string/conversions.rb
index 39c2b1b8ed..3f05db62c3 100644
--- a/activesupport/lib/active_support/core_ext/string/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/string/conversions.rb
@@ -1,4 +1,5 @@
 require 'date'
+require 'active_support/core_ext/time/calculations'
 
 class String
   # 'a'.ord == 'a'[0] for Ruby 1.9 forward compatibility.
diff --git a/activesupport/lib/active_support/core_ext/string/multibyte.rb b/activesupport/lib/active_support/core_ext/string/multibyte.rb
index 0f0dfb2443..13208c6ee2 100644
--- a/activesupport/lib/active_support/core_ext/string/multibyte.rb
+++ b/activesupport/lib/active_support/core_ext/string/multibyte.rb
@@ -1,4 +1,5 @@
 # encoding: utf-8
+require 'active_support/multibyte'
 
 class String
   unless '1.9'.respond_to?(:force_encoding)
diff --git a/activesupport/lib/active_support/dependencies.rb b/activesupport/lib/active_support/dependencies.rb
index 1804c14618..855b720ef1 100644
--- a/activesupport/lib/active_support/dependencies.rb
+++ b/activesupport/lib/active_support/dependencies.rb
@@ -1,11 +1,13 @@
 require 'set'
 require 'thread'
-require 'active_support/inflector'
-require 'active_support/core_ext/name_error'
-require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/module/aliasing'
 require 'active_support/core_ext/module/attribute_accessors'
 require 'active_support/core_ext/module/introspection'
+require 'active_support/core_ext/object/blank'
+require 'active_support/core_ext/load_error'
+require 'active_support/core_ext/name_error'
+require 'active_support/core_ext/string/starts_ends_with'
+require 'active_support/inflector'
 
 module ActiveSupport #:nodoc:
   module Dependencies #:nodoc:
diff --git a/activesupport/lib/active_support/deprecation/method_wrappers.rb b/activesupport/lib/active_support/deprecation/method_wrappers.rb
index b35d4daf9a..b9eb539aa7 100644
--- a/activesupport/lib/active_support/deprecation/method_wrappers.rb
+++ b/activesupport/lib/active_support/deprecation/method_wrappers.rb
@@ -1,4 +1,5 @@
 require 'active_support/core_ext/module/deprecation'
+require 'active_support/core_ext/module/aliasing'
 
 module ActiveSupport
   class << Deprecation
diff --git a/activesupport/lib/active_support/deprecation/proxy_wrappers.rb b/activesupport/lib/active_support/deprecation/proxy_wrappers.rb
index 1c268d0d9c..ec54efe08e 100644
--- a/activesupport/lib/active_support/deprecation/proxy_wrappers.rb
+++ b/activesupport/lib/active_support/deprecation/proxy_wrappers.rb
@@ -1,3 +1,5 @@
+require 'active_support/inflector'
+
 module ActiveSupport
   module Deprecation
     class DeprecationProxy #:nodoc:
@@ -61,7 +63,7 @@ module ActiveSupport
 
       private
         def target
-          @new_const.to_s.constantize
+          ActiveSupport::Inflector.constantize(@new_const.to_s)
         end
 
         def warn(callstack, called, args)
diff --git a/activesupport/lib/active_support/duration.rb b/activesupport/lib/active_support/duration.rb
index f64661c5b1..a33586f77f 100644
--- a/activesupport/lib/active_support/duration.rb
+++ b/activesupport/lib/active_support/duration.rb
@@ -1,4 +1,5 @@
 require 'active_support/basic_object'
+require 'active_support/core_ext/array/conversions'
 
 module ActiveSupport
   # Provides accurate date and time measurements using Date#advance and 
diff --git a/activesupport/lib/active_support/inflector.rb b/activesupport/lib/active_support/inflector.rb
index 614afa1bd6..ff70d6d76e 100644
--- a/activesupport/lib/active_support/inflector.rb
+++ b/activesupport/lib/active_support/inflector.rb
@@ -1,6 +1,7 @@
 # encoding: utf-8
 require 'iconv'
-
+require 'active_support/core_ext/object/blank'
+require 'active_support/core_ext/string/access'
 require 'active_support/core_ext/string/multibyte'
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/json.rb b/activesupport/lib/active_support/json.rb
index 91f19f8a70..fc433de582 100644
--- a/activesupport/lib/active_support/json.rb
+++ b/activesupport/lib/active_support/json.rb
@@ -1,8 +1,37 @@
+require 'active_support/core_ext/module/delegation'
 require 'active_support/core_ext/module/attribute_accessors'
 
 module ActiveSupport
   # If true, use ISO 8601 format for dates and times. Otherwise, fall back to the Active Support legacy format.
   mattr_accessor :use_standard_json_time_format
+  # Look for and parse json strings that look like ISO 8601 times.
+  mattr_accessor :parse_json_times
+
+  module JSON
+    # matches YAML-formatted dates
+    DATE_REGEX = /^(?:\d{4}-\d{2}-\d{2}|\d{4}-\d{1,2}-\d{1,2}[ \t]+\d{1,2}:\d{2}:\d{2}(\.[0-9]*)?(([ \t]*)Z|[-+]\d{2}?(:\d{2})?))$/
+
+    class << self
+      attr_reader :backend
+      delegate :decode, :to => :backend
+    
+      def backend=(name)
+        if name.is_a?(Module)
+          @backend = name
+        else
+          require "active_support/json/backends/#{name.to_s.downcase}.rb"
+          @backend = ActiveSupport::JSON::Backends::const_get(name)
+        end
+      end
+    
+      def with_backend(name)
+        old_backend, self.backend = backend, name
+        yield
+      ensure
+        self.backend = old_backend
+      end
+    end
+  end
 
   class << self
     def escape_html_entities_in_json
@@ -19,7 +48,8 @@ module ActiveSupport
       @escape_html_entities_in_json = value
     end
   end
+
+  JSON.backend = 'Yaml'
 end
 
-require 'active_support/json/encoding'
-require 'active_support/json/decoding'
+require 'active_support/json/encoding'
\ No newline at end of file
diff --git a/activesupport/lib/active_support/json/backends/jsongem.rb b/activesupport/lib/active_support/json/backends/jsongem.rb
new file mode 100644
index 0000000000..de847e30a3
--- /dev/null
+++ b/activesupport/lib/active_support/json/backends/jsongem.rb
@@ -0,0 +1,36 @@
+module ActiveSupport
+  module JSON
+    ParseError = ::JSON::ParserError
+
+    module Backends
+      module JSONGem
+        extend self
+
+        # Converts a JSON string into a Ruby object.
+        def decode(json)
+          data = ::JSON.parse(json)
+          if ActiveSupport.parse_json_times
+            convert_dates_from(data)
+          else
+            data
+          end
+        end
+
+      private
+        def convert_dates_from(data)
+          case data
+            when DATE_REGEX
+              DateTime.parse(data)
+            when Array
+              data.map! { |d| convert_dates_from(d) }
+            when Hash
+              data.each do |key, value|
+                data[key] = convert_dates_from(value)
+              end
+            else data
+          end
+        end
+      end
+    end
+  end
+end
\ No newline at end of file
diff --git a/activesupport/lib/active_support/json/backends/yaml.rb b/activesupport/lib/active_support/json/backends/yaml.rb
new file mode 100644
index 0000000000..c7db508c23
--- /dev/null
+++ b/activesupport/lib/active_support/json/backends/yaml.rb
@@ -0,0 +1,83 @@
+require 'active_support/core_ext/string/starts_ends_with'
+
+module ActiveSupport
+  module JSON
+    class ParseError < StandardError
+    end
+
+    module Backends
+      module Yaml
+        extend self
+
+        # Converts a JSON string into a Ruby object.
+        def decode(json)
+          YAML.load(convert_json_to_yaml(json))
+        rescue ArgumentError => e
+          raise ParseError, "Invalid JSON string"
+        end
+    
+        protected
+          # Ensure that ":" and "," are always followed by a space
+          def convert_json_to_yaml(json) #:nodoc:
+            require 'strscan' unless defined? ::StringScanner
+            scanner, quoting, marks, pos, times = ::StringScanner.new(json), false, [], nil, []
+            while scanner.scan_until(/(\\['"]|['":,\\]|\\.)/)
+              case char = scanner[1]
+              when '"', "'"
+                if !quoting
+                  quoting = char
+                  pos = scanner.pos
+                elsif quoting == char
+                  if json[pos..scanner.pos-2] =~ DATE_REGEX
+                    # found a date, track the exact positions of the quotes so we can remove them later.
+                    # oh, and increment them for each current mark, each one is an extra padded space that bumps
+                    # the position in the final YAML output
+                    total_marks = marks.size
+                    times << pos+total_marks << scanner.pos+total_marks
+                  end
+                  quoting = false
+                end
+              when ":",","
+                marks << scanner.pos - 1 unless quoting
+              end
+            end
+
+            if marks.empty?
+              json.gsub(/\\([\\\/]|u[[:xdigit:]]{4})/) do
+                ustr = $1
+                if ustr.start_with?('u')
+                  [ustr[1..-1].to_i(16)].pack("U")
+                elsif ustr == '\\'
+                  '\\\\'
+                else
+                  ustr
+                end
+              end
+            else
+              left_pos  = [-1].push(*marks)
+              right_pos = marks << scanner.pos + scanner.rest_size
+              output    = []
+              left_pos.each_with_index do |left, i|
+                scanner.pos = left.succ
+                output << scanner.peek(right_pos[i] - scanner.pos + 1).gsub(/\\([\\\/]|u[[:xdigit:]]{4})/) do
+                  ustr = $1
+                  if ustr.start_with?('u')
+                    [ustr[1..-1].to_i(16)].pack("U")
+                  elsif ustr == '\\'
+                    '\\\\'
+                  else
+                    ustr
+                  end
+                end
+              end
+              output = output * " "
+
+              times.each { |i| output[i-1] = ' ' }
+              output.gsub!(/\\\//, '/')
+              output
+            end
+          end
+      end
+    end
+  end
+end
diff --git a/activesupport/lib/active_support/json/decoding.rb b/activesupport/lib/active_support/json/decoding.rb
deleted file mode 100644
index 70e9f40fc7..0000000000
--- a/activesupport/lib/active_support/json/decoding.rb
+++ /dev/null
@@ -1,82 +0,0 @@
-require 'active_support/core_ext/string/starts_ends_with'
-
-module ActiveSupport
-  module JSON
-    class ParseError < StandardError
-    end
-    
-    class << self
-      # Converts a JSON string into a Ruby object.
-      def decode(json)
-        YAML.load(convert_json_to_yaml(json))
-      rescue ArgumentError => e
-        raise ParseError, "Invalid JSON string"
-      end
-      
-      protected
-        # matches YAML-formatted dates
-        DATE_REGEX = /^(?:\d{4}-\d{2}-\d{2}|\d{4}-\d{1,2}-\d{1,2}[ \t]+\d{1,2}:\d{2}:\d{2}(\.[0-9]*)?(([ \t]*)Z|[-+]\d{2}?(:\d{2})?)?)$/
-
-        # Ensure that ":" and "," are always followed by a space
-        def convert_json_to_yaml(json) #:nodoc:
-          require 'strscan' unless defined? ::StringScanner
-          scanner, quoting, marks, pos, times = ::StringScanner.new(json), false, [], nil, []
-          while scanner.scan_until(/(\\['"]|['":,\\]|\\.)/)
-            case char = scanner[1]
-            when '"', "'"
-              if !quoting
-                quoting = char
-                pos = scanner.pos
-              elsif quoting == char
-                if json[pos..scanner.pos-2] =~ DATE_REGEX
-                  # found a date, track the exact positions of the quotes so we can remove them later.
-                  # oh, and increment them for each current mark, each one is an extra padded space that bumps
-                  # the position in the final YAML output
-                  total_marks = marks.size
-                  times << pos+total_marks << scanner.pos+total_marks
-                end
-                quoting = false
-              end
-            when ":",","
-              marks << scanner.pos - 1 unless quoting
-            end
-          end
-
-          if marks.empty?
-            json.gsub(/\\([\\\/]|u[[:xdigit:]]{4})/) do
-              ustr = $1
-              if ustr.start_with?('u')
-                [ustr[1..-1].to_i(16)].pack("U")
-              elsif ustr == '\\'
-                '\\\\'
-              else
-                ustr
-              end
-            end
-          else
-            left_pos  = [-1].push(*marks)
-            right_pos = marks << scanner.pos + scanner.rest_size
-            output    = []
-            left_pos.each_with_index do |left, i|
-              scanner.pos = left.succ
-              output << scanner.peek(right_pos[i] - scanner.pos + 1).gsub(/\\([\\\/]|u[[:xdigit:]]{4})/) do
-                ustr = $1
-                if ustr.start_with?('u')
-                  [ustr[1..-1].to_i(16)].pack("U")
-                elsif ustr == '\\'
-                  '\\\\'
-                else
-                  ustr
-                end
-              end
-            end
-            output = output * " "
-            
-            times.each { |i| output[i-1] = ' ' }
-            output.gsub!(/\\\//, '/')
-            output
-          end
-        end
-    end
-  end
-end
diff --git a/activesupport/lib/active_support/json/encoders/date.rb b/activesupport/lib/active_support/json/encoders/date.rb
index cc84de1388..79c3957362 100644
--- a/activesupport/lib/active_support/json/encoders/date.rb
+++ b/activesupport/lib/active_support/json/encoders/date.rb
@@ -11,11 +11,13 @@ class Date
   #   # With ActiveSupport.use_standard_json_time_format = false
   #   Date.new(2005,2,1).to_json
   #   # => "2005/02/01"
-  def to_json(options = nil)
+  def rails_to_json(options = nil)
     if ActiveSupport.use_standard_json_time_format
       %("#{strftime("%Y-%m-%d")}")
     else
       %("#{strftime("%Y/%m/%d")}")
     end
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/date_time.rb b/activesupport/lib/active_support/json/encoders/date_time.rb
index 6c85824105..cdfc39b9f3 100644
--- a/activesupport/lib/active_support/json/encoders/date_time.rb
+++ b/activesupport/lib/active_support/json/encoders/date_time.rb
@@ -11,11 +11,13 @@ class DateTime
   #   # With ActiveSupport.use_standard_json_time_format = false
   #   DateTime.civil(2005,2,1,15,15,10).to_json
   #   # => "2005/02/01 15:15:10 +0000"
-  def to_json(options = nil)
+  def rails_to_json(options = nil)
     if ActiveSupport.use_standard_json_time_format
       xmlschema.inspect
     else
       strftime('"%Y/%m/%d %H:%M:%S %z"')
     end
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/enumerable.rb b/activesupport/lib/active_support/json/encoders/enumerable.rb
index 881b1d62c1..e1c3ec249d 100644
--- a/activesupport/lib/active_support/json/encoders/enumerable.rb
+++ b/activesupport/lib/active_support/json/encoders/enumerable.rb
@@ -6,7 +6,9 @@ module Enumerable
   #   # => users.to_json(:only => :name)
   #
   # will pass the <tt>:only => :name</tt> option to each user.
-  def to_json(options = {}) #:nodoc:
-    "[#{map { |value| ActiveSupport::JSON.encode(value, options) } * ', '}]"
+  def rails_to_json(options = {}) #:nodoc:
+    "[#{map { |value| ActiveSupport::JSON.encode(value, options) } * ','}]"
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/false_class.rb b/activesupport/lib/active_support/json/encoders/false_class.rb
index bf0844334b..a7657cca37 100644
--- a/activesupport/lib/active_support/json/encoders/false_class.rb
+++ b/activesupport/lib/active_support/json/encoders/false_class.rb
@@ -1,5 +1,7 @@
 class FalseClass
-  def to_json(options = nil) #:nodoc:
+  def rails_to_json(options = nil) #:nodoc:
     'false'
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/hash.rb b/activesupport/lib/active_support/json/encoders/hash.rb
index d87b880743..19b97d7b8c 100644
--- a/activesupport/lib/active_support/json/encoders/hash.rb
+++ b/activesupport/lib/active_support/json/encoders/hash.rb
@@ -30,7 +30,7 @@ class Hash
   # would pass the <tt>:include => :posts</tt> option to <tt>users</tt>,
   # allowing the posts association in the User model to be converted to JSON
   # as well.
-  def to_json(options = {}) #:nodoc:
+  def rails_to_json(options = {}) #:nodoc:
     hash_keys = self.keys
 
     if except = options[:except]
@@ -41,8 +41,10 @@ class Hash
 
     result = '{'
     result << hash_keys.map do |key|
-      "#{ActiveSupport::JSON.encode(key.to_s)}: #{ActiveSupport::JSON.encode(self[key], options)}"
-    end * ', '
+      "#{ActiveSupport::JSON.encode(key.to_s)}:#{ActiveSupport::JSON.encode(self[key], options)}"
+    end * ','
     result << '}'
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/nil_class.rb b/activesupport/lib/active_support/json/encoders/nil_class.rb
index 4763471ac4..b31e1dd249 100644
--- a/activesupport/lib/active_support/json/encoders/nil_class.rb
+++ b/activesupport/lib/active_support/json/encoders/nil_class.rb
@@ -1,5 +1,7 @@
 class NilClass
-  def to_json(options = nil) #:nodoc:
+  def rails_to_json(options = nil) #:nodoc:
     'null'
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/numeric.rb b/activesupport/lib/active_support/json/encoders/numeric.rb
index 38713fb369..491b330c39 100644
--- a/activesupport/lib/active_support/json/encoders/numeric.rb
+++ b/activesupport/lib/active_support/json/encoders/numeric.rb
@@ -1,5 +1,7 @@
 class Numeric
-  def to_json(options = nil) #:nodoc:
+  def rails_to_json(options = nil) #:nodoc:
     to_s
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/object.rb b/activesupport/lib/active_support/json/encoders/object.rb
index 0475967aee..d68f50562e 100644
--- a/activesupport/lib/active_support/json/encoders/object.rb
+++ b/activesupport/lib/active_support/json/encoders/object.rb
@@ -2,7 +2,9 @@ require 'active_support/core_ext/object/instance_variables'
 
 class Object
   # Dumps object in JSON (JavaScript Object Notation). See www.json.org for more info.
-  def to_json(options = {})
+  def rails_to_json(options = {})
     ActiveSupport::JSON.encode(instance_values, options)
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/regexp.rb b/activesupport/lib/active_support/json/encoders/regexp.rb
index b6116b70b5..63ccd7c490 100644
--- a/activesupport/lib/active_support/json/encoders/regexp.rb
+++ b/activesupport/lib/active_support/json/encoders/regexp.rb
@@ -1,5 +1,7 @@
 class Regexp
-  def to_json(options = nil) #:nodoc:
+  def rails_to_json(options = nil) #:nodoc:
     inspect
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/string.rb b/activesupport/lib/active_support/json/encoders/string.rb
index 5ef797955a..27bef3b9cc 100644
--- a/activesupport/lib/active_support/json/encoders/string.rb
+++ b/activesupport/lib/active_support/json/encoders/string.rb
@@ -22,7 +22,7 @@ end
 ActiveSupport.escape_html_entities_in_json = true
 
 class String
-  def to_json(options = nil) #:nodoc:
+  def rails_to_json(options = nil) #:nodoc:
     json = '"' + gsub(ActiveSupport::JSON::Encoding.escape_regex) { |s|
       ActiveSupport::JSON::Encoding::ESCAPED_CHARS[s]
     }
@@ -33,4 +33,6 @@ class String
       s.unpack("U*").pack("n*").unpack("H*")[0].gsub(/.{4}/, '\\\\u\&')
     } + '"'
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/symbol.rb b/activesupport/lib/active_support/json/encoders/symbol.rb
index 485112f97c..6487bf8cb7 100644
--- a/activesupport/lib/active_support/json/encoders/symbol.rb
+++ b/activesupport/lib/active_support/json/encoders/symbol.rb
@@ -1,5 +1,7 @@
 class Symbol
-  def to_json(options = {}) #:nodoc:
+  def rails_to_json(options = {}) #:nodoc:
     ActiveSupport::JSON.encode(to_s, options)
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/time.rb b/activesupport/lib/active_support/json/encoders/time.rb
index f45a0059e8..2699672949 100644
--- a/activesupport/lib/active_support/json/encoders/time.rb
+++ b/activesupport/lib/active_support/json/encoders/time.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/time/conversions'
+
 class Time
   # Returns a JSON string representing the time. If ActiveSupport.use_standard_json_time_format is set to true, the
   # ISO 8601 format is used.
@@ -11,11 +13,13 @@ class Time
   #   # With ActiveSupport.use_standard_json_time_format = false
   #   Time.utc(2005,2,1,15,15,10).to_json
   #   # => "2005/02/01 15:15:10 +0000"
-  def to_json(options = nil)
+  def rails_to_json(options = nil)
     if ActiveSupport.use_standard_json_time_format
       xmlschema.inspect
     else
       %("#{strftime("%Y/%m/%d %H:%M:%S")} #{formatted_offset(false)}")
     end
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoders/true_class.rb b/activesupport/lib/active_support/json/encoders/true_class.rb
index 037d812b3f..ac7c7d1e87 100644
--- a/activesupport/lib/active_support/json/encoders/true_class.rb
+++ b/activesupport/lib/active_support/json/encoders/true_class.rb
@@ -1,5 +1,7 @@
 class TrueClass
-  def to_json(options = nil) #:nodoc:
+  def rails_to_json(options = nil) #:nodoc:
     'true'
   end
+
+  alias to_json rails_to_json
 end
diff --git a/activesupport/lib/active_support/json/encoding.rb b/activesupport/lib/active_support/json/encoding.rb
index aaaa3cdfd2..42a217cedc 100644
--- a/activesupport/lib/active_support/json/encoding.rb
+++ b/activesupport/lib/active_support/json/encoding.rb
@@ -8,7 +8,7 @@ module ActiveSupport
       seen = (options[:seen] ||= [])
       raise CircularReferenceError, 'object references itself' if seen.include?(value)
       seen << value
-      value.send(:to_json, options)
+      value.send(:rails_to_json, options)
     ensure
       seen.pop
     end
diff --git a/activesupport/lib/active_support/json/variable.rb b/activesupport/lib/active_support/json/variable.rb
index 7fd23b0a9e..3ee152ee3c 100644
--- a/activesupport/lib/active_support/json/variable.rb
+++ b/activesupport/lib/active_support/json/variable.rb
@@ -2,7 +2,7 @@ module ActiveSupport
   module JSON
     # A string that returns itself as its JSON-encoded form.
     class Variable < String
-      def to_json(options=nil)
+      def rails_to_json(options=nil)
         self
       end
     end
diff --git a/activesupport/lib/active_support/memoizable.rb b/activesupport/lib/active_support/memoizable.rb
index 2b85fd7be4..edf626802a 100644
--- a/activesupport/lib/active_support/memoizable.rb
+++ b/activesupport/lib/active_support/memoizable.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/metaclass'
+
 module ActiveSupport
   module SafelyMemoizable
     def safely_memoize(*symbols)
diff --git a/activesupport/lib/active_support/multibyte.rb b/activesupport/lib/active_support/multibyte.rb
index 65a96af49a..d8d58f3bce 100644
--- a/activesupport/lib/active_support/multibyte.rb
+++ b/activesupport/lib/active_support/multibyte.rb
@@ -4,6 +4,8 @@ require 'active_support/multibyte/chars'
 require 'active_support/multibyte/exceptions'
 require 'active_support/multibyte/unicode_database'
 
+require 'active_support/core_ext/module/attribute_accessors'
+
 module ActiveSupport #:nodoc:
   module Multibyte
     # A list of all available normalization forms. See http://www.unicode.org/reports/tr15/tr15-29.html for more
diff --git a/activesupport/lib/active_support/new_callbacks.rb b/activesupport/lib/active_support/new_callbacks.rb
index 356d70b650..7a48dbac04 100644
--- a/activesupport/lib/active_support/new_callbacks.rb
+++ b/activesupport/lib/active_support/new_callbacks.rb
@@ -1,3 +1,6 @@
+require 'active_support/core_ext/array/wrap'
+require 'active_support/core_ext/class/inheritable_attributes'
+
 module ActiveSupport
   # Callbacks are hooks into the lifecycle of an object that allow you to trigger logic
   # before or after an alteration of the object state.
diff --git a/activesupport/lib/active_support/testing/assertions.rb b/activesupport/lib/active_support/testing/assertions.rb
index ca51adba1e..c529b92240 100644
--- a/activesupport/lib/active_support/testing/assertions.rb
+++ b/activesupport/lib/active_support/testing/assertions.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/array/wrap'
+
 module ActiveSupport
   module Testing
     module Assertions
diff --git a/activesupport/lib/active_support/time_with_zone.rb b/activesupport/lib/active_support/time_with_zone.rb
index aa448debda..1949ce0ad3 100644
--- a/activesupport/lib/active_support/time_with_zone.rb
+++ b/activesupport/lib/active_support/time_with_zone.rb
@@ -130,14 +130,16 @@ module ActiveSupport
     #   # With ActiveSupport.use_standard_json_time_format = false
     #   Time.utc(2005,2,1,15,15,10).in_time_zone.to_json
     #   # => "2005/02/01 15:15:10 +0000"
-    def to_json(options = nil)
-      if ActiveSupport.use_standard_json_time_format
+    def rails_to_json(options = nil)
+      if !ActiveSupport.respond_to?(:use_standard_json_time_format) || ActiveSupport.use_standard_json_time_format
         xmlschema.inspect
       else
         %("#{time.strftime("%Y/%m/%d %H:%M:%S")} #{formatted_offset(false)}")
       end
     end
 
+    alias to_json rails_to_json
+
     def to_yaml(options = {})
       if options.kind_of?(YAML::Emitter)
         utc.to_yaml(options)
diff --git a/activesupport/lib/active_support/xml_mini.rb b/activesupport/lib/active_support/xml_mini.rb
index ccd1349491..f22fbcc0e1 100644
--- a/activesupport/lib/active_support/xml_mini.rb
+++ b/activesupport/lib/active_support/xml_mini.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/module/delegation'
+
 module ActiveSupport
   # = XmlMini
   #
diff --git a/activesupport/lib/active_support/xml_mini/rexml.rb b/activesupport/lib/active_support/xml_mini/rexml.rb
index 771109514c..5033210aae 100644
--- a/activesupport/lib/active_support/xml_mini/rexml.rb
+++ b/activesupport/lib/active_support/xml_mini/rexml.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 # = XmlMini ReXML implementation
 module ActiveSupport
   module XmlMini_REXML #:nodoc: