1module Psych
2  module JSON
3    module YAMLEvents # :nodoc:
4      def start_document version, tag_directives, implicit
5        super(version, tag_directives, !streaming?)
6      end
7
8      def end_document implicit_end = !streaming?
9        super(implicit_end)
10      end
11
12      def start_mapping anchor, tag, implicit, style
13        super(anchor, nil, true, Nodes::Mapping::FLOW)
14      end
15
16      def start_sequence anchor, tag, implicit, style
17        super(anchor, nil, true, Nodes::Sequence::FLOW)
18      end
19
20      def scalar value, anchor, tag, plain, quoted, style
21        if "tag:yaml.org,2002:null" == tag
22          super('null', nil, nil, true, false, Nodes::Scalar::PLAIN)
23        else
24          super
25        end
26      end
27    end
28  end
29end
30