File GedcomxFile/DefaultXMLSerialization.php

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<?php

namespace Gedcomx\GedcomxFile;

use Gedcomx\Extensions\FamilySearch\FamilySearchPlatform;
use Gedcomx\Gedcomx;
use Gedcomx\Util\XmlMapper;

/**
 * Class DefaultXMLSerialization
 * @package Gedcomx\GedcomxFile
 *          A class for for reading and writing GEDCOM X files.
 */
class DefaultXMLSerialization implements GedcomxEntrySerializer, GedcomxEntryDeserializer
{

    /**
     * Deserialize the resource from the specified input stream.
     *
     * @param string $incoming The text to deserialize.
     *
     * @return mixed the resource.
     */
    public function deserialize($incoming)
    {
        $resources = null;

        $reader = new \XMLReader();
        $reader->xml($incoming);
        $reader->read();
        do {
            if ($reader->nodeType == \XMLReader::ELEMENT && XmlMapper::isKnownType($reader->name)) {
                $class = XmlMapper::getClassName($reader->name);
                $resources[] = new $class($reader);
            }
        } while ($reader->read());

        return $resources;
    }

    /**
     * Serialize the resource to the specified output stream.
     *
     * @param mixed $resource
     *
     * @return string
     */
    public function serialize($resource)
    {
        $xml = new \XMLWriter();
        $xml->openMemory();
        $xml->setIndent(true);
        $xml->setIndentString("    ");
        $xml->startDocument('1.0', 'UTF-8');
        $resource->toXml($xml);
        $xml->endDocument();

        return $xml->outputMemory(true);
    }

    /**
     * Whether the specified content type is a known content type and therefore
     * does not need to be written to the entry attributes.
     *
     * @param string $contentType The content type.
     *
     * @return boolean Whether the content type is "known".
     */
    public function isKnownContentType($contentType)
    {
        return in_array($contentType, array(
            Gedcomx::XML_MEDIA_TYPE,
            FamilySearchPlatform::XML_MEDIA_TYPE
        ));
    }
}

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