Convert Hash conversions extension module to class reopen

1 files changed, 209 insertions, 217 deletions

diff --git a/activesupport/lib/active_support/core_ext/hash/conversions.rb b/activesupport/lib/active_support/core_ext/hash/conversions.rb
index 10435975c5..45e56381a9 100644
--- a/activesupport/lib/active_support/core_ext/hash/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/hash/conversions.rb
@@ -1,237 +1,229 @@
 require 'date'
+require 'active_support/core_ext/object/conversions'
+require 'active_support/core_ext/array/conversions'
 
-module ActiveSupport #:nodoc:
-  module CoreExtensions #:nodoc:
-    module Hash #:nodoc:
-      module Conversions
-        # This module exists to decorate files deserialized using Hash.from_xml with
-        # the <tt>original_filename</tt> and <tt>content_type</tt> methods.
-        module FileLike #:nodoc:
-          attr_writer :original_filename, :content_type
-
-          def original_filename
-            @original_filename || 'untitled'
-          end
-
-          def content_type
-            @content_type || 'application/octet-stream'
-          end
-        end
+class Hash
+  # This module exists to decorate files deserialized using Hash.from_xml with
+  # the <tt>original_filename</tt> and <tt>content_type</tt> methods.
+  module FileLike #:nodoc:
+    attr_writer :original_filename, :content_type
 
-        XML_TYPE_NAMES = {
-          "Symbol"     => "symbol",
-          "Fixnum"     => "integer",
-          "Bignum"     => "integer",
-          "BigDecimal" => "decimal",
-          "Float"      => "float",
-          "TrueClass"  => "boolean",
-          "FalseClass" => "boolean",
-          "Date"       => "date",
-          "DateTime"   => "datetime",
-          "Time"       => "datetime",
-          "ActiveSupport::TimeWithZone" => "datetime"
-        } unless defined?(XML_TYPE_NAMES)
-
-        XML_FORMATTING = {
-          "symbol"   => Proc.new { |symbol| symbol.to_s },
-          "date"     => Proc.new { |date| date.to_s(:db) },
-          "datetime" => Proc.new { |time| time.xmlschema },
-          "binary"   => Proc.new { |binary| ActiveSupport::Base64.encode64(binary) },
-          "yaml"     => Proc.new { |yaml| yaml.to_yaml }
-        } unless defined?(XML_FORMATTING)
-
-        # TODO: use Time.xmlschema instead of Time.parse;
-        #       use regexp instead of Date.parse
-        unless defined?(XML_PARSING)
-          XML_PARSING = {
-            "symbol"       => Proc.new  { |symbol|  symbol.to_sym },
-            "date"         => Proc.new  { |date|    ::Date.parse(date) },
-            "datetime"     => Proc.new  { |time|    ::Time.parse(time).utc rescue ::DateTime.parse(time).utc },
-            "integer"      => Proc.new  { |integer| integer.to_i },
-            "float"        => Proc.new  { |float|   float.to_f },
-            "decimal"      => Proc.new  { |number|  BigDecimal(number) },
-            "boolean"      => Proc.new  { |boolean| %w(1 true).include?(boolean.strip) },
-            "string"       => Proc.new  { |string|  string.to_s },
-            "yaml"         => Proc.new  { |yaml|    YAML::load(yaml) rescue yaml },
-            "base64Binary" => Proc.new  { |bin|     ActiveSupport::Base64.decode64(bin) },
-            "file"         => Proc.new do |file, entity|
-              f = StringIO.new(ActiveSupport::Base64.decode64(file))
-              f.extend(FileLike)
-              f.original_filename = entity['name']
-              f.content_type = entity['content_type']
-              f
-            end
-          }
+    def original_filename
+      @original_filename || 'untitled'
+    end
 
-          XML_PARSING.update(
-            "double"   => XML_PARSING["float"],
-            "dateTime" => XML_PARSING["datetime"]
-          )
-        end
+    def content_type
+      @content_type || 'application/octet-stream'
+    end
+  end
 
-        def self.included(klass)
-          klass.extend(ClassMethods)
-        end
+  XML_TYPE_NAMES = {
+    "Symbol"     => "symbol",
+    "Fixnum"     => "integer",
+    "Bignum"     => "integer",
+    "BigDecimal" => "decimal",
+    "Float"      => "float",
+    "TrueClass"  => "boolean",
+    "FalseClass" => "boolean",
+    "Date"       => "date",
+    "DateTime"   => "datetime",
+    "Time"       => "datetime",
+    "ActiveSupport::TimeWithZone" => "datetime"
+  } unless defined?(XML_TYPE_NAMES)
+
+  XML_FORMATTING = {
+    "symbol"   => Proc.new { |symbol| symbol.to_s },
+    "date"     => Proc.new { |date| date.to_s(:db) },
+    "datetime" => Proc.new { |time| time.xmlschema },
+    "binary"   => Proc.new { |binary| ActiveSupport::Base64.encode64(binary) },
+    "yaml"     => Proc.new { |yaml| yaml.to_yaml }
+  } unless defined?(XML_FORMATTING)
+
+  # TODO: use Time.xmlschema instead of Time.parse;
+  #       use regexp instead of Date.parse
+  unless defined?(XML_PARSING)
+    XML_PARSING = {
+      "symbol"       => Proc.new  { |symbol|  symbol.to_sym },
+      "date"         => Proc.new  { |date|    ::Date.parse(date) },
+      "datetime"     => Proc.new  { |time|    ::Time.parse(time).utc rescue ::DateTime.parse(time).utc },
+      "integer"      => Proc.new  { |integer| integer.to_i },
+      "float"        => Proc.new  { |float|   float.to_f },
+      "decimal"      => Proc.new  { |number|  BigDecimal(number) },
+      "boolean"      => Proc.new  { |boolean| %w(1 true).include?(boolean.strip) },
+      "string"       => Proc.new  { |string|  string.to_s },
+      "yaml"         => Proc.new  { |yaml|    YAML::load(yaml) rescue yaml },
+      "base64Binary" => Proc.new  { |bin|     ActiveSupport::Base64.decode64(bin) },
+      "file"         => Proc.new do |file, entity|
+        f = StringIO.new(ActiveSupport::Base64.decode64(file))
+        f.extend(FileLike)
+        f.original_filename = entity['name']
+        f.content_type = entity['content_type']
+        f
+      end
+    }
 
-        # Converts a hash into a string suitable for use as a URL query string. An optional <tt>namespace</tt> can be
-        # passed to enclose the param names (see example below).
-        #
-        # ==== Examples
-        #   { :name => 'David', :nationality => 'Danish' }.to_query # => "name=David&nationality=Danish"
-        #
-        #   { :name => 'David', :nationality => 'Danish' }.to_query('user') # => "user%5Bname%5D=David&user%5Bnationality%5D=Danish"
-        def to_query(namespace = nil)
-          collect do |key, value|
-            value.to_query(namespace ? "#{namespace}[#{key}]" : key)
-          end.sort * '&'
-        end
-        
-        alias_method :to_param, :to_query
-
-        def to_xml(options = {})
-          require 'builder' unless defined?(Builder)
-
-          options[:indent] ||= 2
-          options.reverse_merge!({ :builder => Builder::XmlMarkup.new(:indent => options[:indent]),
-                                   :root => "hash" })
-          options[:builder].instruct! unless options.delete(:skip_instruct)
-          root = rename_key(options[:root].to_s, options)
-
-          options[:builder].__send__(:method_missing, root) do
-            each do |key, value|
-              case value
-                when ::Hash
-                  value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
-                when ::Array
-                  value.to_xml(options.merge({ :root => key, :children => key.to_s.singularize, :skip_instruct => true}))
-                when ::Method, ::Proc
-                  # If the Method or Proc takes two arguments, then
-                  # pass the suggested child element name.  This is
-                  # used if the Method or Proc will be operating over
-                  # multiple records and needs to create an containing
-                  # element that will contain the objects being
-                  # serialized.
-                  if 1 == value.arity
-                    value.call(options.merge({ :root => key, :skip_instruct => true }))
-                  else
-                    value.call(options.merge({ :root => key, :skip_instruct => true }), key.to_s.singularize)
-                  end
-                else
-                  if value.respond_to?(:to_xml)
-                    value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
-                  else
-                    type_name = XML_TYPE_NAMES[value.class.name]
-
-                    key = rename_key(key.to_s, options)
-
-                    attributes = options[:skip_types] || value.nil? || type_name.nil? ? { } : { :type => type_name }
-                    if value.nil?
-                      attributes[:nil] = true
-                    end
-
-                    options[:builder].tag!(key,
-                      XML_FORMATTING[type_name] ? XML_FORMATTING[type_name].call(value) : value,
-                      attributes
-                    )
-                  end
-              end
-            end
-            
-            yield options[:builder] if block_given?
-          end
+    XML_PARSING.update(
+      "double"   => XML_PARSING["float"],
+      "dateTime" => XML_PARSING["datetime"]
+    )
+  end
 
-        end
+  # Converts a hash into a string suitable for use as a URL query string. An optional <tt>namespace</tt> can be
+  # passed to enclose the param names (see example below).
+  #
+  # ==== Examples
+  #   { :name => 'David', :nationality => 'Danish' }.to_query # => "name=David&nationality=Danish"
+  #
+  #   { :name => 'David', :nationality => 'Danish' }.to_query('user') # => "user%5Bname%5D=David&user%5Bnationality%5D=Danish"
+  def to_query(namespace = nil)
+    collect do |key, value|
+      value.to_query(namespace ? "#{namespace}[#{key}]" : key)
+    end.sort * '&'
+  end
+  
+  alias_method :to_param, :to_query
+
+  def to_xml(options = {})
+    require 'builder' unless defined?(Builder)
+
+    options[:indent] ||= 2
+    options.reverse_merge!({ :builder => Builder::XmlMarkup.new(:indent => options[:indent]),
+                             :root => "hash" })
+    options[:builder].instruct! unless options.delete(:skip_instruct)
+    root = rename_key(options[:root].to_s, options)
+
+    options[:builder].__send__(:method_missing, root) do
+      each do |key, value|
+        case value
+          when ::Hash
+            value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
+          when ::Array
+            value.to_xml(options.merge({ :root => key, :children => key.to_s.singularize, :skip_instruct => true}))
+          when ::Method, ::Proc
+            # If the Method or Proc takes two arguments, then
+            # pass the suggested child element name.  This is
+            # used if the Method or Proc will be operating over
+            # multiple records and needs to create an containing
+            # element that will contain the objects being
+            # serialized.
+            if 1 == value.arity
+              value.call(options.merge({ :root => key, :skip_instruct => true }))
+            else
+              value.call(options.merge({ :root => key, :skip_instruct => true }), key.to_s.singularize)
+            end
+          else
+            if value.respond_to?(:to_xml)
+              value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
+            else
+              type_name = XML_TYPE_NAMES[value.class.name]
 
-        def rename_key(key, options = {})
-          camelize = options.has_key?(:camelize) && options[:camelize]
-          dasherize = !options.has_key?(:dasherize) || options[:dasherize]
-          key = key.camelize if camelize
-          dasherize ? key.dasherize : key
-        end
+              key = rename_key(key.to_s, options)
 
-        module ClassMethods
-          def from_xml(xml)
-            typecast_xml_value(unrename_keys(XmlMini.parse(xml)))
-          end
-
-          private
-            def typecast_xml_value(value)
-              case value.class.to_s
-                when 'Hash'
-                  if value['type'] == 'array'
-                    child_key, entries = value.detect { |k,v| k != 'type' }   # child_key is throwaway
-                    if entries.nil? || (c = value['__content__'] && c.blank?)
-                      []
-                    else
-                      case entries.class.to_s   # something weird with classes not matching here.  maybe singleton methods breaking is_a?
-                      when "Array"
-                        entries.collect { |v| typecast_xml_value(v) }
-                      when "Hash"
-                        [typecast_xml_value(entries)]
-                      else
-                        raise "can't typecast #{entries.inspect}"
-                      end
-                    end
-                  elsif value.has_key?("__content__")
-                    content = value["__content__"]
-                    if parser = XML_PARSING[value["type"]]
-                      if parser.arity == 2
-                        XML_PARSING[value["type"]].call(content, value)
-                      else
-                        XML_PARSING[value["type"]].call(content)
-                      end
-                    else
-                      content
-                    end
-                  elsif value['type'] == 'string' && value['nil'] != 'true'
-                    ""
-                  # blank or nil parsed values are represented by nil
-                  elsif value.blank? || value['nil'] == 'true'
-                    nil
-                  # If the type is the only element which makes it then 
-                  # this still makes the value nil, except if type is
-                  # a XML node(where type['value'] is a Hash)
-                  elsif value['type'] && value.size == 1 && !value['type'].is_a?(::Hash)
-                    nil
-                  else
-                    xml_value = value.inject({}) do |h,(k,v)|
-                      h[k] = typecast_xml_value(v)
-                      h
-                    end
-                    
-                    # Turn { :files => { :file => #<StringIO> } into { :files => #<StringIO> } so it is compatible with
-                    # how multipart uploaded files from HTML appear
-                    xml_value["file"].is_a?(StringIO) ? xml_value["file"] : xml_value
-                  end
-                when 'Array'
-                  value.map! { |i| typecast_xml_value(i) }
-                  case value.length
-                    when 0 then nil
-                    when 1 then value.first
-                    else value
-                  end
-                when 'String'
-                  value
-                else
-                  raise "can't typecast #{value.class.name} - #{value.inspect}"
+              attributes = options[:skip_types] || value.nil? || type_name.nil? ? { } : { :type => type_name }
+              if value.nil?
+                attributes[:nil] = true
               end
+
+              options[:builder].tag!(key,
+                XML_FORMATTING[type_name] ? XML_FORMATTING[type_name].call(value) : value,
+                attributes
+              )
             end
+        end
+      end
+      
+      yield options[:builder] if block_given?
+    end
 
-            def unrename_keys(params)
-              case params.class.to_s
-                when "Hash"
-                  params.inject({}) do |h,(k,v)|
-                    h[k.to_s.underscore.tr("-", "_")] = unrename_keys(v)
-                    h
-                  end
+  end
+
+  def rename_key(key, options = {})
+    camelize = options.has_key?(:camelize) && options[:camelize]
+    dasherize = !options.has_key?(:dasherize) || options[:dasherize]
+    key = key.camelize if camelize
+    dasherize ? key.dasherize : key
+  end
+
+  class << self
+    def from_xml(xml)
+      typecast_xml_value(unrename_keys(ActiveSupport::XmlMini.parse(xml)))
+    end
+
+    private
+      def typecast_xml_value(value)
+        case value.class.to_s
+          when 'Hash'
+            if value['type'] == 'array'
+              child_key, entries = value.detect { |k,v| k != 'type' }   # child_key is throwaway
+              if entries.nil? || (c = value['__content__'] && c.blank?)
+                []
+              else
+                case entries.class.to_s   # something weird with classes not matching here.  maybe singleton methods breaking is_a?
                 when "Array"
-                  params.map { |v| unrename_keys(v) }
+                  entries.collect { |v| typecast_xml_value(v) }
+                when "Hash"
+                  [typecast_xml_value(entries)]
                 else
-                  params
+                  raise "can't typecast #{entries.inspect}"
+                end
               end
+            elsif value.has_key?("__content__")
+              content = value["__content__"]
+              if parser = XML_PARSING[value["type"]]
+                if parser.arity == 2
+                  XML_PARSING[value["type"]].call(content, value)
+                else
+                  XML_PARSING[value["type"]].call(content)
+                end
+              else
+                content
+              end
+            elsif value['type'] == 'string' && value['nil'] != 'true'
+              ""
+            # blank or nil parsed values are represented by nil
+            elsif value.blank? || value['nil'] == 'true'
+              nil
+            # If the type is the only element which makes it then 
+            # this still makes the value nil, except if type is
+            # a XML node(where type['value'] is a Hash)
+            elsif value['type'] && value.size == 1 && !value['type'].is_a?(::Hash)
+              nil
+            else
+              xml_value = value.inject({}) do |h,(k,v)|
+                h[k] = typecast_xml_value(v)
+                h
+              end
+              
+              # Turn { :files => { :file => #<StringIO> } into { :files => #<StringIO> } so it is compatible with
+              # how multipart uploaded files from HTML appear
+              xml_value["file"].is_a?(StringIO) ? xml_value["file"] : xml_value
             end
+          when 'Array'
+            value.map! { |i| typecast_xml_value(i) }
+            case value.length
+              when 0 then nil
+              when 1 then value.first
+              else value
+            end
+          when 'String'
+            value
+          else
+            raise "can't typecast #{value.class.name} - #{value.inspect}"
+        end
+      end
+
+      def unrename_keys(params)
+        case params.class.to_s
+          when "Hash"
+            params.inject({}) do |h,(k,v)|
+              h[k.to_s.underscore.tr("-", "_")] = unrename_keys(v)
+              h
+            end
+          when "Array"
+            params.map { |v| unrename_keys(v) }
+          else
+            params
         end
       end
-    end
   end
 end