JsonLdImplementation.php in Zircon Profile 8

File

vendor/easyrdf/easyrdf/lib/EasyRdf/Parser/JsonLdImplementation.php

<?php

/**
 * EasyRdf
 *
 * LICENSE
 *
 * Copyright (c) 2009-2013 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) 2009-2013 Nicholas J Humfrey
 * @license    http://www.opensource.org/licenses/bsd-license.php
 */

/**
 * Class to parse JSON-LD to an EasyRdf_Graph
 *
 * @package    EasyRdf
 * @copyright  Copyright (c) 2014 Markus Lanthaler
 * @author     Markus Lanthaler <[e-mail]>
 * @license    http://www.opensource.org/licenses/bsd-license.php
 */
class EasyRdf_Parser_JsonLd extends EasyRdf_Parser {

  /**
   * Parse a JSON-LD document into an EasyRdf_Graph
   *
   * Attention: Since JSON-LD supports datasets, a document may contain
   * multiple graphs and not just one. This parser returns only the
   * default graph. An alternative would be to merge all graphs.
   *
   * @param object EasyRdf_Graph $graph   the graph to load the data into
   * @param string               $data    the RDF document data
   * @param string               $format  the format of the input data
   * @param string               $baseUri the base URI of the data being parsed
   * @return integer             The number of triples added to the graph
   */
  public function parse($graph, $data, $format, $baseUri) {
    parent::checkParseParams($graph, $data, $format, $baseUri);
    if ($format != 'jsonld') {
      throw new EasyRdf_Exception("EasyRdf_Parser_JsonLd does not support {$format}");
    }
    try {
      $quads = \ML\JsonLD\JsonLD::toRdf($data, array(
        'base' => $baseUri,
      ));
    } catch (\ML\JsonLD\Exception\JsonLdException $e) {
      throw new EasyRdf_Parser_Exception($e
        ->getMessage());
    }
    foreach ($quads as $quad) {

      // Ignore named graphs
      if (null !== $quad
        ->getGraph()) {
        continue;
      }
      $subject = (string) $quad
        ->getSubject();
      if ('_:' === substr($subject, 0, 2)) {
        $subject = $this
          ->remapBnode($subject);
      }
      $predicate = (string) $quad
        ->getProperty();
      if ($quad
        ->getObject() instanceof \ML\IRI\IRI) {
        $object = array(
          'type' => 'uri',
          'value' => (string) $quad
            ->getObject(),
        );
        if ('_:' === substr($object['value'], 0, 2)) {
          $object = array(
            'type' => 'bnode',
            'value' => $this
              ->remapBnode($object['value']),
          );
        }
      }
      else {
        $object = array(
          'type' => 'literal',
          'value' => $quad
            ->getObject()
            ->getValue(),
        );
        if ($quad
          ->getObject() instanceof \ML\JsonLD\LanguageTaggedString) {
          $object['lang'] = $quad
            ->getObject()
            ->getLanguage();
        }
        else {
          $object['datatype'] = $quad
            ->getObject()
            ->getType();
        }
      }
      $this
        ->addTriple($subject, $predicate, $object);
    }
    return $this->tripleCount;
  }

}

Classes

Name	Description
EasyRdf_Parser_JsonLd	Class to parse JSON-LD to an EasyRdf_Graph