public function getLocationInformation() {
		if($this->locationInfo === null) {

			$locationInfo = array();
			$trace = debug_backtrace();
			$prevHop = null;
			// make a downsearch to identify the caller
			$hop = array_pop($trace);
			while($hop !== null) {
				if(isset($hop['class'])) {
					// we are sometimes in functions = no class available: avoid php warning here
					$className = strtolower($hop['class']);
					if(!empty($className) and ($className == 'logger' or 
						strtolower(get_parent_class($className)) == 'logger')) {
						$locationInfo['line'] = $hop['line'];
						$locationInfo['file'] = $hop['file'];
						break;
					}
				}
				$prevHop = $hop;
				$hop = array_pop($trace);
			}
			$locationInfo['class'] = isset($prevHop['class']) ? $prevHop['class'] : 'main';
			if(isset($prevHop['function']) and
				$prevHop['function'] !== 'include' and
				$prevHop['function'] !== 'include_once' and
				$prevHop['function'] !== 'require' and
				$prevHop['function'] !== 'require_once') {

				$locationInfo['function'] = $prevHop['function'];
			} else {
				$locationInfo['function'] = 'main';
			}
					 
			$this->locationInfo = new LoggerLocationInfo($locationInfo, $this->fqcn);
		}
		return $this->locationInfo;
	}