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<?php
namespace EasyRdf\Serialiser;
/**
* EasyRdf
*
* LICENSE
*
* Copyright (c) 2009-2016 Nicholas J Humfrey. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author 'Nicholas J Humfrey" may be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package EasyRdf
* @copyright Copyright (c) 2009-2016 Nicholas J Humfrey
* @license https://www.opensource.org/licenses/bsd-license.php
*/
use EasyRdf\Exception;
use EasyRdf\Format;
use EasyRdf\Graph;
/**
* Class to serialise RDF using the ARC2 library.
*
* @package EasyRdf
* @copyright Copyright (c) 2009-2016 Nicholas J Humfrey
* @license https://www.opensource.org/licenses/bsd-license.php
*/
class Arc extends RdfPhp
{
private static $supportedTypes = array(
'rdfxml' => 'RDFXML',
'turtle' => 'Turtle',
'ntriples' => 'NTriples',
'posh' => 'POSHRDF'
);
/**
* Constructor
*/
public function __construct()
{
if (!class_exists('ARC2')) {
throw new Exception('ARC2 dependency is not installed');
}
}
/**
* Serialise an EasyRdf\Graph into RDF format of choice.
*
* @param Graph $graph An EasyRdf\Graph object.
* @param string $format The name of the format to convert to.
* @param array $options
*
* @return string The RDF in the new desired format.
* @throws Exception
*/
public function serialise(Graph $graph, $format, array $options = array())
{
parent::checkSerialiseParams($format);
if (array_key_exists($format, self::$supportedTypes)) {
$className = self::$supportedTypes[$format];
} else {
throw new Exception(
"EasyRdf\\Serialiser\\Arc does not support: {$format}"
);
}
/** @var \ARC2_RDFSerializer $serialiser */
$serialiser = \ARC2::getSer($className);
if ($serialiser) {
return $serialiser->getSerializedIndex(
parent::serialise($graph, 'php')
);
} else {
throw new Exception(
"ARC2 failed to get a $className serialiser."
);
}
}
}
Format::register('posh', 'poshRDF');
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