Registry{
  void registerEntitiesAsTypes()
    bypassing ParentEntity to Entity
  {
    (@
       Registry registry;
    @)
    before Registry (@
      registry = host;
    @)
    before Entity (@
      registry.registerAsType(host);
    @)
  }
  void registerAsType(Entity entity)
    to {GeneratedCodeCategory,NonGeneratedCodeCategory}
  {
    (@
       Registry registry;
    @)
    before Registry (@
      registry = host;
    @)
    before CodeCategory (@
      String className = host.className(entity);
      File headerFile = host.headerFile(entity);
    
      DefinedType type
        = new SimpleClassType(
                 new TypeName(className),
                 new HeaderFile(headerFile.getName()));
      // I would really like to let this exception pass on through
      // but I have no way to declare that the generated visitor method
      // throws a ParseException.
      try {
        registry.add(type);
      }
      catch(ParseException e){
        System.err.println(e.getMessage());
        System.exit(1);
      }
    @)
  }
}