1 files changed, 29 insertions, 0 deletions
diff --git a/ext/psych/lib/psych/json/yaml_events.rb b/ext/psych/lib/psych/json/yaml_events.rb
new file mode 100644
index 0000000000..01d4660f85
--- /dev/null
+++ b/ext/psych/lib/psych/json/yaml_events.rb
@@ -0,0 +1,29 @@
+module Psych
+  module JSON
+    module YAMLEvents # :nodoc:
+      def start_document version, tag_directives, implicit
+        super(version, tag_directives, !streaming?)
+      end
+
+      def end_document implicit_end = !streaming?
+        super(implicit_end)
+      end
+
+      def start_mapping anchor, tag, implicit, style
+        super(anchor, nil, implicit, Nodes::Mapping::FLOW)
+      end
+
+      def start_sequence anchor, tag, implicit, style
+        super(anchor, nil, implicit, Nodes::Sequence::FLOW)
+      end
+
+      def scalar value, anchor, tag, plain, quoted, style
+        if "tag:yaml.org,2002:null" == tag
+          super('null', nil, nil, true, false, Nodes::Scalar::PLAIN)
+        else
+          super
+        end
+      end
+    end
+  end
+end