Basic fragment class and renderer code. Need to be tested

lib/rabl-fast-json/fragment.rb

@@ -0,0 +1,41 @@
+require 'active_support/cache'
+
+module RablFastJson
+  class Fragment
+
+    attr_reader :compiled_source, :options
+
+    def initialize(key, source, options = {})
+      @key = key
+      @compiled_source = source
+      @options = options
+    end
+
+    def expand_cache_key(data)
+      @key.call(data)
+    end
+
+    def fetch_and_render
+      Rails.cache.fetch(key)
+    end
+  end
+end
+
+
+# def cache(options = {}, &block)
+#   return unless block_given?
+#   key = options.delete(:key)
+#   source = sub_compiler { compile_block(&block) }
+#   @template[:"_cache#{cache_count}"] = Fragment.new(key, source, options)
+# end
+
+#
+# when Fragment
+#   render_fragment(value)
+#
+
+# def render_fragment(data, fragment)
+#   Rails.cache.fetch(fragment.expand_cache_key(data), fragment.options) do
+#     render_resource(data, fragment.compiled_source)
+#   end
+# end