Sulu\Component\Content\Metadata\Loader\XmlLegacyLoader::loadCacheLifetime PHP Method

    private function loadCacheLifetime($path, \DOMXPath $xpath)
    {
        $nodeList = $xpath->query($path);
        if (!$nodeList->length) {
            return ['type' => CacheLifetimeResolverInterface::TYPE_SECONDS, 'value' => 0];
        }
        // get first node
        $node = $nodeList->item(0);
        $type = $node->getAttribute('type');
        if ('' === $type) {
            $type = CacheLifetimeResolverInterface::TYPE_SECONDS;
        }
        $value = $node->nodeValue;
        if (!$this->cacheLifetimeResolver->supports($type, $value)) {
            throw new \InvalidArgumentException(sprintf('CacheLifetime "%s" with type "%s" not supported.', $value, $type));
        }
        return ['type' => $type, 'value' => $value];
    }