Source for file SparqlResultParser.php

Documentation is available at SparqlResultParser.php

  1. <?php
  2. // ----------------------------------------------------------------------------------
  3. // Class: SparqlResultParser
  4. // ----------------------------------------------------------------------------------
  5.  
  6. /**
  7. * Parses an xml document in SPARQL Result XML Format.
  8. *
  9. * @version  $Id: fsource_sparql__syntaxSparqlResultParser.php.html 443 2007-06-01 16:25:38Z cax $
  10. * @author   Tobias Gauß <tobias.gauss@web.de>
  11. *
  12. * @package sparql
  13. */
  14.  
  15. class SparqlResultParser extends Object {
  16.  
  17.  
  18.     var $arrOutput = array();
  19.     var $resParser;
  20.     var $strXmlData;
  21.     var $counter = -1;
  22.     var $mode = -1;
  23.     var $varname;
  24.     var $dtype;
  25.     var $lang;
  26.     var $varlist;
  27.     var $bncounter = 0;
  28.     var $current_literal;    
  29.     
  30.     
  31. /**
  32. * Main function of SparqlResultParser
  33. *
  34. * @param String  $strInputXML  input document.
  35. */
  36.     function parse($strInputXML) {
  37.  
  38.         $this->resParser = xml_parser_create ();
  39.  
  40.         xml_set_object($this->resParser,$this);
  41.         xml_set_element_handler($this->resParser, "tagOpen", "tagClosed");
  42.  
  43.         xml_set_character_data_handler($this->resParser, "tagData");
  44.  
  45.         $this->strXmlData = xml_parse($this->resParser,$strInputXML );
  46.         if(!$this->strXmlData) {
  47.             echo "unable to parse result<br>".
  48.             "server returned: <br>"
  49.             .$strInputXML;
  50.             
  51.             return "false";
  52.         
  53.         }
  54.  
  55.         xml_parser_free($this->resParser);
  56.  
  57.         return $this->arrOutput;
  58.     }
  59.     
  60. // private parser functions from here //    
  61.     function tagOpen($parser, $name, $attrs) {
  62.         //  $tag=array("name"=>$name,"attrs"=>$attrs);
  63.         //  array_push($this->arrOutput,$tag);
  64.         if(strtolower($name)=="variable"){
  65.             if(isset($attrs['name']))
  66.                 $this->varlist[]=$attrs['name'];
  67.             if(isset($attrs['NAME']))
  68.                 $this->varlist[]=$attrs['NAME'];
  69.         }
  70.         
  71.         if(strtolower($name)=="result"){
  72.             $this->counter++;
  73.             if($this->counter > -1){
  74.                 foreach($this->varlist as $value){
  75.                     if(!isset($this->arrOutput[$this->counter][$value]))
  76.                         $this->arrOutput[$this->counter]["?".$value]='';
  77.                 }    
  78.             }
  79.             
  80.         }
  81.         if(strtolower($name)=="boolean"){
  82.             $this->counter++;
  83.             $this->mode = 3;
  84.         }
  85.         if(strtolower($name)=="binding"){
  86.             $this->varname = null;
  87.             $this->dtype   = null;
  88.             $this->lang    = null;
  89.             
  90.             if(isset($attrs['name'])){
  91.                 $this->varname = "?".$attrs['name'];
  92.             }else{
  93.                 $this->varname = "?".$attrs['NAME'];
  94.             }
  95.         }
  96.         if(strtolower($name)=="uri"){
  97.             $this->mode = 0;
  98.         }
  99.         if(strtolower($name)=="literal"){
  100.             $this->mode = 1;
  101.             $this->current_literal = "";
  102.             if(isset($attrs['datatype'])){
  103.                 $this->dtype = $attrs['datatype'];
  104.             }else if(isset($attrs['DATATYPE'])){
  105.                 $this->dtype = $attrs['DATATYPE'];
  106.             }
  107.             if(isset($attrs['xml:lang'])){
  108.                 $this->lang = $attrs['datatype'];
  109.             }else if(isset($attrs['XML:lang'])){
  110.                 $this->lang = $attrs['XML:lang'];
  111.             }else if(isset($attrs['XML:LANG'])){
  112.                 $this->lang = $attrs['XML:LANG'];
  113.             }else if(isset($attrs['xml:LANG'])){
  114.                 $this->lang = $attrs['xml:LANG'];
  115.             }
  116.         }
  117.         if(strtolower($name)=="bnode"){
  118.             $this->mode = 2;
  119.         }
  120.     }
  121.  
  122.     function tagData($parser, $tagData) {
  123.         switch($this->mode){
  124.             case 0 :
  125.             $this->arrOutput[$this->counter][$this->varname] = new Resource($tagData);
  126.             $this->mode = -1;
  127.             break;
  128.             case 1:
  129.             $this->current_literal .= $tagData;
  130.             break;
  131.             case 2:
  132.             if($tagData=="/"){
  133.                 $bn = "bNode".$this->bncounter;
  134.                 $this->bncounter++;
  135.             }else{
  136.                 $bn = $tagData;
  137.             }
  138.             $this->arrOutput[$this->counter][$this->varname] = new BlankNode($bn);
  139.             $this->mode = -1;
  140.             break;
  141.             case 3:
  142.             $this->arrOutput = $tagData;
  143.             $this->mode = -1;
  144.             break;
  145.  
  146.         }
  147.         
  148.     }
  149.  
  150.     function tagClosed($parser, $name) {
  151.         if ($this->mode == 1) {
  152.             $lit = new Literal($this->current_literal);
  153.             if($this->lang)
  154.                 $lit->setLanguage($this->lang);
  155.             if($this->dtype)
  156.                 $lit->setDatatype($this->dtype);
  157.             $this->arrOutput[$this->counter][$this->varname] = $lit ;
  158.             $this->mode = -1;
  159.         }        
  160.     }
  161. }
  162.  
  163.  
  164. ?>

Documentation generated on Fri, 1 Jun 2007 16:52:19 +0200 by phpDocumentor 1.3.2