* ext/psych/lib/psych/streaming.rb: refactor streaming methods to a

  module.
* ext/psych/lib/psych/stream.rb: extracted streaming specific methods
  to a module.
* ext/psych/lib/psych/json/stream.rb: JSON stream inherits from
  JSONTree and includes streaming methods.
* ext/psych/lib/psych/visitors/json_tree.rb: JSON does not support
  object references, so remove object reference testing when building
  JSON trees.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30936 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

4 files changed, 33 insertions, 19 deletions

diff --git a/ext/psych/lib/psych/json/stream.rb b/ext/psych/lib/psych/json/stream.rb
index e568719dc8..be1a0a8a82 100644
--- a/ext/psych/lib/psych/json/stream.rb
+++ b/ext/psych/lib/psych/json/stream.rb
@@ -3,8 +3,9 @@ require 'psych/json/yaml_events'
 
 module Psych
   module JSON
-    class Stream < Psych::Stream
+    class Stream < Psych::Visitors::JSONTree
       include Psych::JSON::RubyEvents
+      include Psych::Streaming
 
       class Emitter < Psych::Stream::Emitter # :nodoc:
         include Psych::JSON::YAMLEvents
diff --git a/ext/psych/lib/psych/stream.rb b/ext/psych/lib/psych/stream.rb
index 508483e573..567c1bb790 100644
--- a/ext/psych/lib/psych/stream.rb
+++ b/ext/psych/lib/psych/stream.rb
@@ -31,23 +31,6 @@ module Psych
       end
     end
 
-    ###
-    # Create a new streaming emitter.  Emitter will print to +io+.  See
-    # Psych::Stream for an example.
-    def initialize io
-      super({}, self.class.const_get(:Emitter).new(io))
-    end
-
-    ###
-    # Start streaming using +encoding+
-    def start encoding = Nodes::Stream::UTF8
-      super.tap { yield self if block_given?  }
-    ensure
-      finish if block_given?
-    end
-
-    private
-    def register target, obj
-    end
+    include Psych::Streaming
   end
 end
diff --git a/ext/psych/lib/psych/streaming.rb b/ext/psych/lib/psych/streaming.rb
new file mode 100644
index 0000000000..c6fa109d5a
--- /dev/null
+++ b/ext/psych/lib/psych/streaming.rb
@@ -0,0 +1,22 @@
+module Psych
+  module Streaming
+    ###
+    # Create a new streaming emitter.  Emitter will print to +io+.  See
+    # Psych::Stream for an example.
+    def initialize io
+      super({}, self.class.const_get(:Emitter).new(io))
+    end
+
+    ###
+    # Start streaming using +encoding+
+    def start encoding = Nodes::Stream::UTF8
+      super.tap { yield self if block_given?  }
+    ensure
+      finish if block_given?
+    end
+
+    private
+    def register target, obj
+    end
+  end
+end
diff --git a/ext/psych/lib/psych/visitors/json_tree.rb b/ext/psych/lib/psych/visitors/json_tree.rb
index 292afae623..0350dd1faa 100644
--- a/ext/psych/lib/psych/visitors/json_tree.rb
+++ b/ext/psych/lib/psych/visitors/json_tree.rb
@@ -8,6 +8,14 @@ module Psych
       def initialize options = {}, emitter = Psych::JSON::TreeBuilder.new
         super
       end
+
+      def accept target
+        if target.respond_to?(:encode_with)
+          dump_coder target
+        else
+          send(@dispatch_cache[target.class], target)
+        end
+      end
     end
   end
 end