24 include_once 
'./Services/Search/classes/Lucene/class.ilLuceneAdvancedSearchFields.php';
 
   25 include_once 
'./Services/Administration/classes/class.ilSetting.php';
 
   50                 $this->storage = 
new ilSetting(
'lucene_adv_search');
 
   56                 if(isset(self::$instance) and self::$instance != null)
 
   68                 return $this->fields[$a_field] ? $this->fields[$a_field] : 
false;
 
   77                 $this->fields[$a_field] = (bool) $a_status;
 
   82                 foreach($this->fields as $name => $status)
 
   84                         $this->storage->set($name,$status ? 
"1" : 
"0");
 
   93                         $this->fields[$name] = (bool) $this->storage->get($name,
true);