1 files changed, 22 insertions, 0 deletions
diff --git a/ext/json/lib/json/generic_object.rb b/ext/json/lib/json/generic_object.rb
index 7f3dbbd78d..8b1074c941 100644
--- a/ext/json/lib/json/generic_object.rb
+++ b/ext/json/lib/json/generic_object.rb
@@ -5,12 +5,34 @@ module JSON
     class << self
       alias [] new
 
+      def json_creatable?
+        @json_creatable
+      end
+
+      attr_writer :json_creatable
+
       def json_create(data)
         data = data.dup
         data.delete JSON.create_id
         self[data]
       end
+
+      def from_hash(object)
+        case
+        when object.respond_to?(:to_hash)
+          result = new
+          object.to_hash.each do |key, value|
+            result[key] = from_hash(value)
+          end
+          result
+        when object.respond_to?(:to_ary)
+          object.to_ary.map { |a| from_hash(a) }
+        else
+          object
+        end
+      end
     end
+    self.json_creatable = false
 
     def to_hash
       table