public function isValid()
    {
        return $this->getID() != null && $this->getURL() != null && $this->getLocalPath() != null;
    }
public function isValid()
    {
        return $this->getID() != null && $this->getURL() != null && $this->getLocalPath() != null;
    }
public function isValid ( ) { return $ this -> getID ( ) != null && $ this -> getURL ( ) != null && $ this -> getLocalPath ( ) != null ; }
Determines if this is a valid file object or not.

@return boolean
Determines if this is a valid file object or not .