Json.php in Zircon Profile 8

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vendor/easyrdf/easyrdf/lib/EasyRdf/Parser/Json.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
 */

/**
 * A pure-php class to parse RDF/JSON with no dependancies.
 *
 * http://n2.talis.com/wiki/RDF_JSON_Specification
 * docs/appendix-a-rdf-formats-json.md
 *
 * @package    EasyRdf
 * @copyright  Copyright (c) 2009-2013 Nicholas J Humfrey
 * @license    http://www.opensource.org/licenses/bsd-license.php
 */
class EasyRdf_Parser_Json extends EasyRdf_Parser_RdfPhp {
  private $jsonLastErrorExists = false;

  /**
   * Constructor
   *
   * @return object EasyRdf_Parser_Json
   */
  public function __construct() {
    $this->jsonLastErrorExists = function_exists('json_last_error');
  }

  /** Return the last JSON parser error as a string
   *
   * If json_last_error() is not available a generic message will be returned.
   *
   * @ignore
   */
  protected function jsonLastErrorString() {
    if ($this->jsonLastErrorExists) {
      switch (json_last_error()) {
        case JSON_ERROR_NONE:
          return null;
        case JSON_ERROR_DEPTH:
          return "JSON Parse error: the maximum stack depth has been exceeded";
        case JSON_ERROR_STATE_MISMATCH:
          return "JSON Parse error: invalid or malformed JSON";
        case JSON_ERROR_CTRL_CHAR:
          return "JSON Parse error: control character error, possibly incorrectly encoded";
        case JSON_ERROR_SYNTAX:
          return "JSON Parse syntax error";
        case JSON_ERROR_UTF8:
          return "JSON Parse error: malformed UTF-8 characters, possibly incorrectly encoded";
        default:
          return "JSON Parse error: unknown";
      }
    }
    else {
      return "JSON Parse error";
    }
  }

  /** Parse the triple-centric JSON format, as output by libraptor
   *
   * http://librdf.org/raptor/api/serializer-json.html
   *
   * @ignore
   */
  protected function parseJsonTriples($data, $baseUri) {
    foreach ($data['triples'] as $triple) {
      if ($triple['subject']['type'] == 'bnode') {
        $subject = $this
          ->remapBnode($triple['subject']['value']);
      }
      else {
        $subject = $triple['subject']['value'];
      }
      $predicate = $triple['predicate']['value'];
      if ($triple['object']['type'] == 'bnode') {
        $object = array(
          'type' => 'bnode',
          'value' => $this
            ->remapBnode($triple['object']['value']),
        );
      }
      else {
        $object = $triple['object'];
      }
      $this
        ->addTriple($subject, $predicate, $object);
    }
    return $this->tripleCount;
  }

  /**
   * Parse RDF/JSON into an EasyRdf_Graph
   *
   * @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) {
    $this
      ->checkParseParams($graph, $data, $format, $baseUri);
    if ($format != 'json') {
      throw new EasyRdf_Exception("EasyRdf_Parser_Json does not support: {$format}");
    }
    $decoded = @json_decode(strval($data), true);
    if ($decoded === null) {
      throw new EasyRdf_Parser_Exception($this
        ->jsonLastErrorString());
    }
    if (array_key_exists('triples', $decoded)) {
      return $this
        ->parseJsonTriples($decoded, $baseUri);
    }
    else {
      return parent::parse($graph, $decoded, 'php', $baseUri);
    }
  }

}

Classes

Name	Description
EasyRdf_Parser_Json	A pure-php class to parse RDF/JSON with no dependancies.