<?php

/*

 * This file is part of the Symfony package.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Symfony\Component\CssSelector;

/**

 * XPathExprOr represents XPath |'d expressions.

 *

 * Note that unfortunately it isn't the union, it's the sum, so duplicate elements will appear.

 *

 * This component is a port of the Python lxml library,

 * which is copyright Infrae and distributed under the BSD license.

 *

 * @author Fabien Potencier <fabien@symfony.com>

 */

class XPathExprOr extends XPathExpr

{

    /**

     * Constructor.

     *

     * @param array  $items  The items in the expression.

     * @param string $prefix Optional prefix for the expression.

     */

    public function __construct($items, $prefix = null)

    {

        $this->items = $items;

        $this->prefix = $prefix;

    }

    /**

     * Gets a string representation of this |'d expression.

     *

     * @return string

     */

    public function __toString()

    {

        $prefix = $this->prefix;

        $tmp = array();

        foreach ($this->items as $i) {

            $tmp[] = sprintf('%s%s', $prefix, $i);

        }

        return implode($tmp, ' | ');

    }

}