Source for file TriXParser.php

Documentation is available at TriXParser.php

  1. <?php
  2. // ----------------------------------------------------------------------------------
  3. // Class: TriXParser
  4. // ----------------------------------------------------------------------------------
  5.  
  6. /**
  7. * Temporary implementation of a TriX-Parser (Usable only with PHP > V5)
  8. * Currently, it doesn't support any namespaces and has problems with typed literals.
  9. * So this parser only works with TRIX documents where the default namespace is the TRIX namespace.
  10. *
  11. * @version  $Id: fsource_dataset__syntaxTriXParser.php.html 442 2007-06-01 16:19:26Z cax $
  12. * @author Daniel Westphal (http://www.d-westphal.de)
  13. *
  14. * @package     dataset
  15. * @access    public
  16. ***/
  17. class TriXParser  
  18. {
  19.     /**
  20.     * Reference to the graphSet
  21.     *
  22.     * @var        GraphSet 
  23.     * @access    private
  24.     */
  25.     var $graphSet;
  26.     
  27.     /**
  28.     * Constructor
  29.     * Needs a reference to a graphSet
  30.     *
  31.     * @param    GraphSet 
  32.     * @access    public
  33.     */        
  34.     function TriXParser(&$graphSet)
  35.     {
  36.         $this->graphSet=&$graphSet;    
  37.     }
  38.  
  39.     /**
  40.     * Parse an XML string
  41.     *
  42.     * @param   string 
  43.     * @access    public
  44.     */
  45.     function parseString($string)
  46.     {
  47.         $this->_populateGraphSet(simplexml_load_string($string));
  48.     }
  49.     
  50.     /**
  51.     * Parse from a file
  52.     *
  53.     * @param   string 
  54.     * @access    public
  55.     */
  56.     function parseFile($pathToFile)
  57.     {
  58.         $this->_populateGraphSet(simplexml_load_file($pathToFile));
  59.     }
  60.     
  61.     /**
  62.     * Populates the graphSet with namedGraphs and triples.
  63.     *
  64.     * @param   object simpleXMLModel  $xmlModel 
  65.     * @access    private
  66.     */
  67.     function _populateGraphSet(&$xmlModel)
  68.     {
  69.         $defaultGraphOccurred=false;
  70.         
  71.         foreach ($xmlModel->graph as $graph) 
  72.         {
  73.             if (isset($graph->uri)) 
  74.             {
  75.                 $graphName=(string)$graph->uri;
  76.                 $namedGraph=& $this->graphSet->getNamedGraph($graphName);
  77.                 if ($namedGraph ==null)
  78.                     $namedGraph=& $this->graphSet->createGraph($graphName);
  79.             } else 
  80.             {
  81.                 if ($defaultGraphOccurred)
  82.                     trigger_error('Only one unnamed Graph per file allowed', E_USER_ERROR);
  83.                 
  84.                 $namedGraph=& $this->graphSet->getDefaultGraph();
  85.                 $defaultGraphOccurred=true;
  86.             }    
  87.                         
  88.             foreach ($graph->triple as $triple)
  89.             {
  90.                 $tripleCount=0;
  91.                 $tripleArray=array();
  92.                 foreach ($triple->children() as $tag => $value)
  93.                 {
  94.                     $tripleArray[$tripleCount++]=$this->_element2Resource((string)$tag,$value);
  95.                 };
  96.                 $namedGraph->add(new Statement($tripleArray[0],$tripleArray[1],$tripleArray[2]));    
  97.             };
  98.         };
  99.     }
  100.     
  101.     /**
  102.     * return a mathing resource tyoe
  103.     *
  104.     * @param   string 
  105.     * @param   object simpleXMLNode $value 
  106.     * @access    private
  107.     */
  108.     function _element2Resource($tag,$value)
  109.     {
  110.         switch ($tag) 
  111.         {
  112.                 case 'uri':
  113.                     return new Resource((string)$value);
  114.                 break;
  115.         
  116.                 case 'id':
  117.                     return new BlankNode((string)$value);
  118.                 break;
  119.                 
  120.                 case 'typedLiteral':
  121.                     $literal=new Literal((string)$value);
  122.                     $literal->setDatatype((string)$value['datatype']);
  123.                     return $literal;
  124.                 break;
  125.                     
  126.                 case 'plainLiteral':
  127.                     $literal=new Literal((string)$value);
  128.                     if(isset($value['xml:lang']))
  129.                         $literal->setLanguage((string)$value['xml:lang']);
  130.                     return $literal;
  131.                 break;
  132.         }
  133.     }
  134. }
  135. ?>

Documentation generated on Fri, 1 Jun 2007 16:52:32 +0200 by phpDocumentor 1.3.2