Using Jade with Rewrite

JadeTransformer.java

public class JadeTransformer extends StringTransformer
{

   @Override
   public String transform(String src)
   {
      try {
         return new Jade().process(src, new HashMap<String, Object>());
      }
      catch (IOException e) {
         throw new IllegalStateException(e);
      }
   }

}

MyConfigProvider.java

public class MyConfigProvider extends HttpConfigurationProvider
{
   @Override
   public int priority()
   {
      return 0;
   }

   @Override
   public Configuration getConfiguration(final ServletContext context)
   {
      return ConfigurationBuilder.begin()
               .addRule()
               .when(Path.matches("/{something}.html"))
               .perform(Forward.to("/{something}.jade").and(Transform.with(JadeTransformer.class)));

   }
}