public function beforeSave($event)
 {
     $campos = explode(',', $this->campos);
     foreach ($campos as $campo) {
         if (!(isset($this->getOwner()->{trim($campo) . '_alt'}) && $this->getOwner()->{trim($campo) . '_alt'} != '' && $this->getOwner()->{trim($campo) . '_bdd'} != $this->getOwner()->{trim($campo) . '_alt'})) {
             $this->getOwner()->{trim($campo)} = $this->getOwner()->{trim($campo) . '_bdd'};
         }
         if (isset($this->getOwner()->{trim($campo) . '_time'})) {
             $aux = DateTools::parseAmPmTo24h($this->getOwner()->{trim($campo) . '_time_bdd'});
             $this->getOwner()->{trim($campo)} .= ' ' . $aux;
         }
     }
     return true;
 }