<?php

namespace DoctrineExtensions\Query\Mysql;

use Doctrine\ORM\Query\AST\Functions\FunctionNode;
use Doctrine\ORM\Query\Lexer;

/**
 * @author Metod <metod@simpel.si>
 */
class CharLength extends FunctionNode
{
    private $expr;

    public function getSql(\Doctrine\ORM\Query\SqlWalker $sqlWalker)
    {
        return 'CHAR_LENGTH('.$sqlWalker->walkArithmeticPrimary($this->expr1).')';
    }

    public function parse(\Doctrine\ORM\Query\Parser $parser)
    {
        $parser->match(Lexer::T_IDENTIFIER);
        $parser->match(Lexer::T_OPEN_PARENTHESIS);

        $this->expr1 = $parser->ArithmeticExpression();

        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
    }
}