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 $elementName
*
* @return DOMElement
*
* @throws ManifestElementException
*/
protected function getChildByName($elementName) {
$element = $this->element->getElementsByTagNameNS(self::XMLNS, $elementName)->item(0);
if (!$element instanceof DOMElement) {
throw new ManifestElementException(
sprintf('Element %s missing', $elementName)
);
}
return $element;
}
/**
* @param $elementName
*
* @return DOMNodeList
*
* @throws ManifestElementException
*/
protected function getChildrenByName($elementName) {
$elementList = $this->element->getElementsByTagNameNS(self::XMLNS, $elementName);
if ($elementList->length === 0) {
throw new ManifestElementException(
sprintf('Element(s) %s missing', $elementName)
);
}
return $elementList;
}
/**
* @param string $elementName
*
* @return bool
*/
protected function hasChild($elementName) {
return $this->element->getElementsByTagNameNS(self::XMLNS, $elementName)->length !== 0;
}
}