vendor/phar-io/manifest/src/xml/ManifestElement.php

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<?php
/*
 * This file is part of PharIo\Manifest.
 *
 * (c) Arne Blankerts <arne@blankerts.de>, Sebastian Heuer <sebastian@phpeople.de>, Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace PharIo\Manifest;

use DOMElement;
use DOMNodeList;

class ManifestElement {
    const XMLNS = 'https://phar.io/xml/manifest/1.0';

    /**
     * @var DOMElement
     */
    private $element;

    /**
     * ContainsElement constructor.
     *
     * @param DOMElement $element
     */
    public function __construct(DOMElement $element) {
        $this->element = $element;
    }

    /**
     * @param string $name
     *
     * @return string
     *
     * @throws ManifestElementException
     */
    protected function getAttributeValue($name) {
        if (!$this->element->hasAttribute($name)) {
            throw new ManifestElementException(
                sprintf(
                    'Attribute %s not set on element %s',
                    $name,
                    $this->element->localName
                )
            );
        }

        return $this->element->getAttribute($name);
    }

    /**
     * @param $elementName
     *
     * @return DOMElement
     *
     * @throws ManifestElementException
     */