| 1 | <?php
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| 2 | // ----------------------------------------------------------------------------------
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| 3 | // Class: SparqlResultParser
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| 4 | // ----------------------------------------------------------------------------------
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| 5 |
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| 6 | /**
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| 7 | * Parses an xml document in SPARQL Result XML Format.
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| 8 | *
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| 9 | * @version $Id: SparqlResultParser.php 442 2007-06-01 16:19:26Z cax $
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| 10 | * @author Tobias Gauß <tobias.gauss@web.de>
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| 11 | *
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| 12 | * @package sparql
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| 13 | */
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| 14 |
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| 15 | class SparqlResultParser extends Object {
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| 16 |
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| 17 |
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| 18 | var $arrOutput = array();
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| 19 | var $resParser;
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| 20 | var $strXmlData;
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| 21 | var $counter = -1;
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| 22 | var $mode = -1;
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| 23 | var $varname;
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| 24 | var $dtype;
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| 25 | var $lang;
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| 26 | var $varlist;
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| 27 | var $bncounter = 0;
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| 28 | var $current_literal;
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| 29 |
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| 30 |
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| 31 | /**
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| 32 | * Main function of SparqlResultParser
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| 33 | *
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| 34 | * @param String $strInputXML input document.
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| 35 | */
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| 36 | function parse($strInputXML) {
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| 37 |
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| 38 | $this->resParser = xml_parser_create ();
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| 39 |
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| 40 | xml_set_object($this->resParser,$this);
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| 41 | xml_set_element_handler($this->resParser, "tagOpen", "tagClosed");
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| 42 |
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| 43 | xml_set_character_data_handler($this->resParser, "tagData");
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| 44 |
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| 45 | $this->strXmlData = xml_parse($this->resParser,$strInputXML );
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| 46 | if(!$this->strXmlData) {
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| 47 | echo "unable to parse result<br>".
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| 48 | "server returned: <br>"
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| 49 | .$strInputXML;
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| 50 |
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| 51 | return "false";
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| 52 |
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| 53 | }
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| 54 |
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| 55 | xml_parser_free($this->resParser);
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| 56 |
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| 57 | return $this->arrOutput;
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| 58 | }
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| 59 |
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| 60 | // private parser functions from here //
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| 61 | function tagOpen($parser, $name, $attrs) {
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| 62 | // $tag=array("name"=>$name,"attrs"=>$attrs);
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| 63 | // array_push($this->arrOutput,$tag);
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| 64 | if(strtolower($name)=="variable"){
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| 65 | if(isset($attrs['name']))
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| 66 | $this->varlist[]=$attrs['name'];
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| 67 | if(isset($attrs['NAME']))
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| 68 | $this->varlist[]=$attrs['NAME'];
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| 69 | }
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| 70 |
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| 71 | if(strtolower($name)=="result"){
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| 72 | $this->counter++;
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| 73 | if($this->counter > -1){
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| 74 | foreach($this->varlist as $value){
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| 75 | if(!isset($this->arrOutput[$this->counter][$value]))
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| 76 | $this->arrOutput[$this->counter]["?".$value]='';
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| 77 | }
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| 78 | }
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| 79 |
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| 80 | }
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| 81 | if(strtolower($name)=="boolean"){
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| 82 | $this->counter++;
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| 83 | $this->mode = 3;
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| 84 | }
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| 85 | if(strtolower($name)=="binding"){
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| 86 | $this->varname = null;
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| 87 | $this->dtype = null;
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| 88 | $this->lang = null;
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| 89 |
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| 90 | if(isset($attrs['name'])){
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| 91 | $this->varname = "?".$attrs['name'];
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| 92 | }else{
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| 93 | $this->varname = "?".$attrs['NAME'];
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| 94 | }
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| 95 | }
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| 96 | if(strtolower($name)=="uri"){
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| 97 | $this->mode = 0;
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| 98 | }
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| 99 | if(strtolower($name)=="literal"){
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| 100 | $this->mode = 1;
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| 101 | $this->current_literal = "";
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| 102 | if(isset($attrs['datatype'])){
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| 103 | $this->dtype = $attrs['datatype'];
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| 104 | }else if(isset($attrs['DATATYPE'])){
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| 105 | $this->dtype = $attrs['DATATYPE'];
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| 106 | }
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| 107 | if(isset($attrs['xml:lang'])){
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| 108 | $this->lang = $attrs['datatype'];
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| 109 | }else if(isset($attrs['XML:lang'])){
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| 110 | $this->lang = $attrs['XML:lang'];
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| 111 | }else if(isset($attrs['XML:LANG'])){
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| 112 | $this->lang = $attrs['XML:LANG'];
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| 113 | }else if(isset($attrs['xml:LANG'])){
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| 114 | $this->lang = $attrs['xml:LANG'];
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| 115 | }
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| 116 | }
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| 117 | if(strtolower($name)=="bnode"){
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| 118 | $this->mode = 2;
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| 119 | }
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| 120 | }
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| 121 |
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| 122 | function tagData($parser, $tagData) {
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| 123 | switch($this->mode){
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| 124 | case 0 :
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| 125 | $this->arrOutput[$this->counter][$this->varname] = new Resource($tagData);
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| 126 | $this->mode = -1;
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| 127 | break;
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| 128 | case 1:
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| 129 | $this->current_literal .= $tagData;
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| 130 | break;
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| 131 | case 2:
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| 132 | if($tagData=="/"){
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| 133 | $bn = "bNode".$this->bncounter;
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| 134 | $this->bncounter++;
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| 135 | }else{
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| 136 | $bn = $tagData;
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| 137 | }
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| 138 | $this->arrOutput[$this->counter][$this->varname] = new BlankNode($bn);
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| 139 | $this->mode = -1;
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| 140 | break;
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| 141 | case 3:
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| 142 | $this->arrOutput = $tagData;
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| 143 | $this->mode = -1;
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| 144 | break;
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| 145 |
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| 146 | }
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| 147 |
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| 148 | }
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| 149 |
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| 150 | function tagClosed($parser, $name) {
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| 151 | if ($this->mode == 1) {
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| 152 | $lit = new Literal($this->current_literal);
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| 153 | if($this->lang)
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| 154 | $lit->setLanguage($this->lang);
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| 155 | if($this->dtype)
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| 156 | $lit->setDatatype($this->dtype);
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| 157 | $this->arrOutput[$this->counter][$this->varname] = $lit ;
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| 158 | $this->mode = -1;
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| 159 | }
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| 160 | }
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| 161 | }
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| 162 |
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| 163 |
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| 164 | ?> |
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