private LoggingEvent convertToEvent()

in src/main/java/org/apache/log4j/receivers/varia/LogFilePatternReceiver.java [841:944]
80 lines of code
17 McCabe index (conditional complexity)

  private LoggingEvent convertToEvent(Map fieldMap, String[] exception) {
    if (fieldMap == null) {
      return null;
    }

    //a logger must exist at a minimum for the event to be processed
    if (!fieldMap.containsKey(LOGGER)) {
      fieldMap.put(LOGGER, "Unknown");
    }
    if (exception == null) {
      exception = emptyException;
    }

    Logger logger = null;
    long timeStamp = 0L;
    String level = null;
    String threadName = null;
    Object message = null;
    String ndc = null;
    String className = null;
    String methodName = null;
    String eventFileName = null;
    String lineNumber = null;
    Hashtable properties = new Hashtable();

    logger = Logger.getLogger((String) fieldMap.remove(LOGGER));

    if ((dateFormat != null) && fieldMap.containsKey(TIMESTAMP)) {
      try {
        timeStamp = dateFormat.parse((String) fieldMap.remove(TIMESTAMP))
            .getTime();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    //use current time if timestamp not parseable
    if (timeStamp == 0L) {
      timeStamp = System.currentTimeMillis();
    }

    message = fieldMap.remove(MESSAGE);
    if (message == null) {
      message = "";
    }

    level = (String) fieldMap.remove(LEVEL);
    Level levelImpl;
    if (level == null) {
        levelImpl = Level.DEBUG;
    } else {
        //first try to resolve against custom level definition map, then fall back to regular levels
        levelImpl = (Level) customLevelDefinitionMap.get(level);
        if (levelImpl == null) {
            levelImpl = Level.toLevel(level.trim());
            if (!level.equals(levelImpl.toString())) {
                //check custom level map
                if (levelImpl == null) {
                    levelImpl = Level.DEBUG;
                    getLogger().debug("found unexpected level: " + level + ", logger: " + logger.getName() + ", msg: " + message);
                    //make sure the text that couldn't match a level is added to the message
                    message = level + " " + message;
                }
            }
        }
    }

    threadName = (String) fieldMap.remove(THREAD);

    ndc = (String) fieldMap.remove(NDC);

    className = (String) fieldMap.remove(CLASS);

    methodName = (String) fieldMap.remove(METHOD);

    eventFileName = (String) fieldMap.remove(FILE);

    lineNumber = (String) fieldMap.remove(LINE);

    properties.put(Constants.HOSTNAME_KEY, host);
    properties.put(Constants.APPLICATION_KEY, path);
    properties.put(Constants.RECEIVER_NAME_KEY, getName());

    //all remaining entries in fieldmap are properties
    properties.putAll(fieldMap);

    LocationInfo info = null;

    if ((eventFileName != null) || (className != null) || (methodName != null)
        || (lineNumber != null)) {
      info = new LocationInfo(eventFileName, className, methodName, lineNumber);
    } else {
      info = LocationInfo.NA_LOCATION_INFO;
    }

    LoggingEvent event = new LoggingEvent(null,
            logger, timeStamp, levelImpl, message,
            threadName,
            new ThrowableInformation(exception),
            ndc,
            info,
            properties);

    return event;
  }