simple markdown switcher for jruby vs mri

markdown_renderer.rb

if RUBY_PLATFORM == 'java'
  require 'kramdown'
  TYPE = Kramdown
else
  require 'redcarpet'
  TYPE = Redcarpet
end

class MarkdownRenderer
  def initialize(type=TYPE)
    @parser = Object.const_get("MarkdownRenderer::#{type}").new
  end

  def render_file(path)
    @parser.render File.read(path)
  end

  def render(markdown)
    @parser.render(markdown)
  end

  class Kramdown
    def render(markdown)
      ::Kramdown::Document.new(markdown).to_html
    end
  end

  class Redcarpet
    def initialize
      @renderer = ::Redcarpet::Markdown.new(::Redcarpet::Render::HTML, autolink: true, space_after_headers: true)
    end

    def render(markdown)
      @renderer.render(markdown)
    end
  end
end