File Source for TeraWurflXMLParser_XMLReader

<?php
/**
* Tera_WURFL - PHP MySQL driven WURFL
*
* Tera-WURFL was written by Steve Kamerman, and is based on the
* Java WURFL Evolution package by Luca Passani and WURFL PHP Tools by Andrea Trassati.
* This version uses a MySQL database to store the entire WURFL file, multiple patch
* files, and a persistent caching mechanism to provide extreme performance increases.
*
* @package TeraWurflXMLParser
* @author Steve Kamerman <stevekamerman AT gmail.com>
* @version Stable 2.1.3 $Date: 2010/09/18 15:43:21
* @license http://www.mozilla.org/MPL/ MPL Vesion 1.1
*/
/**
* Loads the wurfl.xml file using the stream-based XMLReader class.
* This version is a HACK, made only for the purpose of extremely low
* memory usage, unlike the other XMLParsers, which are designed for
* speed of updating the database and sanity checking.
* @package TeraWurflXMLParser
*/
class TeraWurflXMLParser_XMLReader_LowMem extends TeraWurflXMLParser{
private $dbcon;
private $pendingInsert = array();
public function __construct(){
if(class_exists('XMLReader')){
$this->parser_type = self::$PARSER_XMLREADER;
}else{
throw new Exception("Cannot load XMLReader");
}
$this->dbcon = new mysqli(TeraWurflConfig::$DB_HOST,TeraWurflConfig::$DB_USER,TeraWurflConfig::$DB_PASS,TeraWurflConfig::$DB_SCHEMA);
$this->xml = new XMLReader();
}
public function open($filename,$file_type){
$this->file_type = $file_type;
$this->xml->open($filename);
//TODO: add error handling
}
public function process(Array &$destination){
while($this->xml->read()){
switch ($this->xml->nodeType){
case XMLReader::ELEMENT:
if($this->xml->name == "device"){
$this->parseDevice();
continue;
}
if($this->file_type == self::$TYPE_WURFL){
if($this->xml->name == "ver" || $this->xml->name == "last_updated"){
if($this->xml->name == "ver") $this->wurflVersion = $this->getValue();
if($this->xml->name == "last_updated") $this->wurflLastUpdated = $this->getValue();
}
}
break;
case XMLReader::END_ELEMENT:
default:
break;
}
}
}
protected function getValue(){
$this->xml->read();
return $this->xml->value;
}
protected function parseDevice(){
if(count($this->pendingInsert)>0){
foreach($this->pendingInsert as $device){
$matcher = UserAgentFactory::userAgentType($this->wurfl,$device['user_agent']);
$uatable = TeraWurflConfig::$TABLE_PREFIX.'_'.$matcher;
}
$this->pendingInsert = array();
}
$this->pendingInsert[$this->xml->getAttribute('id')] = array();
$device =& $this->pendingInsert[$this->xml->getAttribute('id')];
$device=array(
'id' => $this->xml->getAttribute('id'),
'user_agent' => UserAgentUtils::cleanUserAgent($this->xml->getAttribute('user_agent')),
'fall_back' => $this->xml->getAttribute('fall_back'),
);
if($this->xml->getAttribute('actual_device_root')) $device['actual_device_root'] = ($this->xml->getAttribute('actual_device_root')=="true")?1:0;
$groupdevice = '';
$groupname = '';
$filtering = (TeraWurflConfig::$CAPABILITY_FILTER)? true:false;
$includegroup = false;
while($this->xml->read()){
if($this->xml->nodeType != XMLReader::ELEMENT) continue;
// recurse back into this function for the rest of the devices
switch($this->xml->name){
case "device":
$this->parseDevice();
break;
case "group":
$groupname = $this->xml->getAttribute('id');
if($filtering && $this->enabled($this->xml->getAttribute('id'))){
$includegroup = true;
}else{
$includegroup = false;
continue;
}
$device[$groupname] = array();
break;
case "capability":
if(!$filtering || ($filtering && $includegroup)){
// the groupdevice array must already exist
$device[$groupname][$this->xml->getAttribute('name')] = self::cleanValue($this->xml->getAttribute('value'));
continue;
}
if($filtering && !$includegroup && $this->enabled($this->xml->getAttribute('name'))){
// the groupdevice array might already exists
if(!array_key_exists($groupname,$device)) $device[$groupname] = array();
$device[$groupname][$this->xml->getAttribute('name')] = self::cleanValue($this->xml->getAttribute('value'));
continue;
}
break;
}
}
}
}

Source for file TeraWurflXMLParser_XMLReader_LowMem.php