<?php

namespace Lavoisier\Hydrators;

use \Lavoisier\Entries\Entries;

class SimpleXMLHydrator implements IHydrator
{
    private $prefix;
    private $ns;

    function __construct()
    {
        $this->prefix = '';
        $this->ns = '';
    }

    public function hydrate($str)
    {
        $sxObject = simplexml_load_string(
            $str,
            '\SimpleXMLElement',
            0,
            $this->prefix,
            ((empty($this->prefix)) ? false : true)
        );
        if ($sxObject === false) {
            throw new \Exception('Unable to parse XML');
        }

        return $sxObject;
    }

    public function registerNamespace($prefix, $ns)
    {
        $this->prefix = $prefix;
        $this->ns = $ns;
    }

    public function registerEntriesNamespace($useLavoisierXMLNS = true)
    {
        $this->registerNamespace('e', Entries::getXMLNS($useLavoisierXMLNS));
    }
}