<?php

	class SortQueryArgument extends QueryArgument{
            function toString(){
                $arg = sprintf("\n$%s_argument = new SortArgument('%s', %s);\n"
                                        , $this->argument_name
                                        , $this->argument_name
                                        , '$args->'.$this->variable_name);


                $arg .= $this->argument_validator->toString();

                $arg .= sprintf("if(!$%s_argument->isValid()) return $%s_argument->getErrorMessage();\n"
                                    , $this->argument_name
                                    , $this->argument_name
                                    );
                return $arg;
            }
        }
?>