Zend Framework 2.0 Uri validator

Uri.php

<?php

namespace Zend\Validator;

class Uri extends AbstractValidator
{
    const INVALID = 'uriInvalid';

    protected $_messageTemplates = array(
        self::INVALID => "Provided input is not a valid URL"
    );

    /**
     * URL object to use for validation
     *
     * @var \Zend\Uri\Uri
     */
    protected $urlObject = null;

    protected $absolute = true;

    public function __construct($urlObject = null, $absolute = true)
    {
        parent::__construct();

        if (! $urlObject) {
            $urlObject = new \Zend\Uri\Uri;
        } else {
            if (is_string($urlObject)) {
                $urlObject = new $urlObject;
            }

            if (! $urlObject instanceof \Zend\Uri\Uri) {
                throw new \InvalidArgumentException("Unexpected URI class type, expecting an instance of Zend\\Uri\\Uri");
            }
        }

        $this->absolute = (boolean) $absolute;
        $this->urlObject = $urlObject;
    }

    public function isValid($value)
    {
        try {
            if ($this->urlObject->parse($value)) {
                if ($this->urlObject->isValid()) {
                    if ((! $this->absolute) || $this->urlObject->isAbsolute()) {
                        return true;
                    }
                }
            }

        } catch (\Zend\Uri\Exception $ex) {
            // Error parsing URL, it must be invalid
        }

        $this->error(self::INVALID);
        return false;
    }
}