Added Rabl::Renderer

lib/rabl.rb

@@ -10,6 +10,7 @@
 require 'rabl/engine'
 require 'rabl/builder'
 require 'rabl/configuration'
+require 'rabl/renderer'
 require 'rabl/railtie' if defined?(Rails) && Rails.version =~ /^3/
 
 # Rabl.register!

lib/rabl/engine.rb

@@ -9,6 +9,10 @@ def initialize(source, options={})
       @_options = options
     end
 
+    def source=(string)
+      @_source = string
+    end
+
     # Renders the representation based on source, object, scope and locals
     # Rabl::Engine.new("...source...", { :format => "xml" }).render(scope, { :foo => "bar", :object => @user })
     def render(scope, locals, &block)

lib/rabl/renderer.rb

@@ -0,0 +1,31 @@
+module Rabl
+  class Renderer < Engine
+
+    attr_reader :file, :object, :options
+    def initialize(file, object, options = {})
+      options = {:format => :json}.update(options)
+      @file, @object, @options = file, object, options
+
+      view_path = options.delete(:view_path)
+      source, location = engine.fetch_source(file, :view_path => view_path)
+      engine.source = source
+    end
+
+    def render
+      set_instance_variable(object)
+      engine.render(self, {})
+    end
+
+    protected
+
+    def engine
+      @engine ||= Engine.new(nil, options)
+    end
+
+    def set_instance_variable(object)
+      name = model_name(object).split('/').last
+      instance_variable_set(:"@#{name}", object)
+    end
+
+  end
+end