/s3db3.5.10/pearlib/arc/parsers/ARC2_RDFParser.php

<?php

/*

homepage: http://arc.semsol.org/

license:  http://arc.semsol.org/license



class:    ARC2 RDF Parser (generic)

author:   Benjamin Nowack

version:  2008-07-15 (Addition: SG API JSON support)

*/



ARC2::inc('Class');



class ARC2_RDFParser extends ARC2_Class {



  function __construct($a = '', &$caller) {

    parent::__construct($a, $caller);

  }

  

  function ARC2_RDFParser($a = '', &$caller) {

    $this->__construct($a, $caller);

  }



  function __init() {/* proxy_host, proxy_port, proxy_skip, http_accept_header, http_user_agent_header, max_redirects, reader, skip_dupes */

    parent::__init();

    $this->a['format'] = $this->v('format', false, $this->a);

    $this->triples = array();

    $this->t_count = 0;

    $this->added_triples = array();

    $this->skip_dupes = $this->v('skip_dupes', false, $this->a);

    $this->bnode_prefix = $this->v('bnode_prefix', 'arc'.substr(md5(uniqid(rand())), 0, 4).'b', $this->a);

    $this->bnode_id = 0;

  }



  /*  */

  

  function setReader(&$reader) {

    $this->reader =& $reader;

  }

  

  function parse($path, $data = '') {

    /* reader */

    if (!isset($this->reader)) {

      ARC2::inc('Reader');

      $this->reader = & new ARC2_Reader($this->a, $this);

    }

    $this->reader->activate($path, $data) ;

    /* format detection */

    $mappings = array(

      'rdfxml' => 'RDFXML', 

      'turtle' => 'Turtle', 

      'sparqlxml' => 'SPOG', 

      'ntriples' => 'Turtle', 

      'html' => 'SemHTML',

      'rss' => 'RSS',

      'sgajson' => 'SGAJSON'

    );

    $format = $this->reader->getFormat();

    if (!$format || !isset($mappings[$format])) {

      return $this->addError('No parser available for "' . $format . '".');

    }

    /* format parser */

    $suffix = $mappings[$format] . 'Parser';

    ARC2::inc($suffix);

    $cls = 'ARC2_' . $suffix;

    $this->parser =& new $cls($this->a, $this);

    $this->parser->setReader($this->reader);

    return $this->parser->parse($path, $data);

  }

  

  function parseData($data) {

    return $this->parse(ARC2::getScriptURI(), $data);

  }

  

  /*  */



  function done() {

  }



  /*  */

  

  function getTriples() {

    return $this->v('parser') ? $this->m('getTriples', false, array(), $this->v('parser')) : array();

  }

  

  function countTriples() {

    return $this->v('parser') ? $this->m('countTriples', false, 0, $this->v('parser')) : 0;

  }

  

  function getSimpleIndex($flatten_objects = 1, $vals = '') {

    return ARC2::getSimpleIndex($this->getTriples(), $flatten_objects, $vals);

  }

  

  /*  */

  

  function extractRDF($formats = '') {

    if (method_exists($this->parser, 'extractRDF')) {

      return $this->parser->extractRDF($formats);

    }

  }

  

  /*  */

  

  function getEncoding($src = 'config') {

    if (method_exists($this->parser, 'getEncoding')) {

      return $this->parser->getEncoding($src);

    }

  }



  /*  */



}