class EasyRdf_Parser_Rapper in Zircon Profile 8

Class to parse RDF using the 'rapper' command line tool.

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

Hierarchy

• class \EasyRdf_Parser
  • class \EasyRdf_Parser_RdfPhp
    • class \EasyRdf_Parser_Json
      • class \EasyRdf_Parser_Rapper

File

vendor/easyrdf/easyrdf/lib/EasyRdf/Parser/Rapper.php, line 45

class EasyRdf_Parser_Rapper extends EasyRdf_Parser_Json {
  private $rapperCmd = null;
  const MINIMUM_RAPPER_VERSION = '1.4.17';

  /**
   * Constructor
   *
   * @param string $rapperCmd Optional path to the rapper command to use.
   * @return object EasyRdf_Parser_Rapper
   */
  public function __construct($rapperCmd = 'rapper') {
    $result = exec("{$rapperCmd} --version 2>/dev/null", $output, $status);
    if ($status != 0) {
      throw new EasyRdf_Exception("Failed to execute the command '{$rapperCmd}': {$result}");
    }
    elseif (version_compare($result, self::MINIMUM_RAPPER_VERSION) < 0) {
      throw new EasyRdf_Exception("Version " . self::MINIMUM_RAPPER_VERSION . " or higher of rapper is required.");
    }
    else {
      $this->rapperCmd = $rapperCmd;
    }
  }

  /**
   * Parse an RDF document 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, $baseUri) {
    parent::checkParseParams($graph, $data, $format, $baseUri);
    $json = EasyRdf_Utils::execCommandPipe($this->rapperCmd, array(
      '--quiet',
      '--input',
      $format,
      '--output',
      'json',
      '--ignore-errors',
      '--input-uri',
      $baseUri,
      '--output-uri',
      '-',
      '-',
    ), $data);

    // Parse in the JSON
    return parent::parse($graph, $json, 'json', $baseUri);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
EasyRdf_Parser::$baseUri	protected	property	The base URI for the document currently being parsed
EasyRdf_Parser::$bnodeMap	private	property	Mapping from source to graph bnode identifiers
EasyRdf_Parser::$format	protected	property	The format of the document currently being parsed
EasyRdf_Parser::$graph	protected	property	The current graph to insert triples into
EasyRdf_Parser::$tripleCount	protected	property
EasyRdf_Parser::addTriple	protected	function	Add a triple to the current graph, and keep count of the number of triples @ignore	1
EasyRdf_Parser::checkParseParams	protected	function	Check, cleanup parameters and prepare for parsing @ignore
EasyRdf_Parser::remapBnode	protected	function	Create a new, unique bnode identifier from a source identifier. If the source identifier has previously been seen, the same new bnode identifier is returned. @ignore
EasyRdf_Parser::resetBnodeMap	protected	function	Delete the bnode mapping - to be called at the start of a new parse @ignore
EasyRdf_Parser_Json::$jsonLastErrorExists	private	property
EasyRdf_Parser_Json::jsonLastErrorString	protected	function	Return the last JSON parser error as a string
EasyRdf_Parser_Json::parseJsonTriples	protected	function	Parse the triple-centric JSON format, as output by libraptor
EasyRdf_Parser_Rapper::$rapperCmd	private	property
EasyRdf_Parser_Rapper::MINIMUM_RAPPER_VERSION		constant
EasyRdf_Parser_Rapper::parse	public	function	Parse an RDF document into an EasyRdf_Graph Overrides EasyRdf_Parser_Json::parse
EasyRdf_Parser_Rapper::__construct	public	function	Constructor Overrides EasyRdf_Parser_Json::__construct