<?php



namespace DoctrineExtensions\Query\Oracle;



use Doctrine\ORM\Query\Lexer,

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



/**

 * @author Andréia Bohner <andreiabohner@gmail.com>

 */

class Nvl extends FunctionNode

{

    private $expr1;

    private $expr2;



    public function getSql(\Doctrine\ORM\Query\SqlWalker $sqlWalker)

    {

        return sprintf(

                'NVL(%s, %s)',

                $sqlWalker->walkArithmeticPrimary($this->expr1),

                $sqlWalker->walkArithmeticPrimary($this->expr2));

    }



    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_COMMA);

        $this->expr2 = $parser->ArithmeticExpression();

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

    }

}

