public int compare()

in src/main/java/org/apache/log4j/chainsaw/ColumnComparator.java [42:173]
89 lines of code
35 McCabe index (conditional complexity)

    public int compare(Object o1, Object o2) {
        int sort = 1;

        if (o1 instanceof LoggingEventWrapper && o2 instanceof LoggingEventWrapper) {

//		TODO not everything catered for here yet...

            ChainsawLoggingEvent e1 = ((LoggingEventWrapper) o1).getLoggingEvent();
            ChainsawLoggingEvent e2 = ((LoggingEventWrapper) o2).getLoggingEvent();

            switch (index + 1) {
                case ChainsawColumns.INDEX_LEVEL_COL_NAME:
                    sort = e1.m_level.ordinal() >= (e2.m_level.ordinal()) ? 1 : (-1);

                    break;

                case ChainsawColumns.INDEX_LOGGER_COL_NAME:
                    sort = e1.m_logger.compareToIgnoreCase(e2.m_logger);

                    break;

                case ChainsawColumns.INDEX_MESSAGE_COL_NAME:
                    sort =
                        e1.m_message.compareToIgnoreCase(
                            e2.m_message);

                    break;

                case ChainsawColumns.INDEX_NDC_COL_NAME:
                    if (e1.m_ndc != null && e2.m_ndc != null) {
                        sort =
                            e1.m_ndc.compareToIgnoreCase(
                                e2.m_ndc);
                    } else if (e1.m_ndc == null && e2.m_ndc == null) {
                        sort = 0;
                    } else if (e1.m_ndc == null) {
                        sort = -1;
                    } else if (e2.m_ndc == null) {
                        sort = 1;
                    }

                    break;

                case ChainsawColumns.INDEX_METHOD_COL_NAME:

                    if (
                        (e1.m_locationInfo != null)
                            && (e2.m_locationInfo != null)) {
                        sort =
                            e1.m_locationInfo.methodName.compareToIgnoreCase(
                                e2.m_locationInfo.methodName);
                    }

                    break;

                case ChainsawColumns.INDEX_CLASS_COL_NAME:

                    if (
                        (e1.m_locationInfo != null)
                            && (e2.m_locationInfo != null)) {
                        sort =
                            e1.m_locationInfo.className.compareToIgnoreCase(
                                e2.m_locationInfo.className);
                    }

                    break;

                case ChainsawColumns.INDEX_FILE_COL_NAME:

                    if (
                        (e1.m_locationInfo != null)
                            && (e2.m_locationInfo != null)) {
                        sort =
                            e1.m_locationInfo.methodName.compareToIgnoreCase(
                                e2.m_locationInfo.methodName);
                    }

                    break;

                case ChainsawColumns.INDEX_TIMESTAMP_COL_NAME:
                    sort = e1.m_timestamp.compareTo(e2.m_timestamp);
                    break;

                case ChainsawColumns.INDEX_THREAD_COL_NAME:
                    sort = e1.m_threadName.compareToIgnoreCase(e2.m_threadName);
                    break;

                case ChainsawColumns.INDEX_ID_COL_NAME:
                    int id1 = Integer.parseInt(e1.getProperty(Constants.LOG4J_ID_KEY));
                    int id2 = Integer.parseInt(e2.getProperty(Constants.LOG4J_ID_KEY));
                    sort = Integer.compare(id2, id1);
                    break;

                case ChainsawColumns.INDEX_THROWABLE_COL_NAME:
//                    if (e1.getThrowableStrRep() != null && e2.getThrowableStrRep() != null) {
//                        String[] s1 = e1.getThrowableStrRep();
//                        String[] s2 = e2.getThrowableStrRep();
//                        boolean foundDiff = false;
//                        for (int i = 0; i < s1.length; i++) {
//                            if (foundDiff || i > s2.length) {
//                                break;
//                            }
//                            sort = s1[i].compareToIgnoreCase(s2[i]);
//                            foundDiff = sort != 0;
//                        }
//                    }
                    break;

                case ChainsawColumns.INDEX_LINE_COL_NAME:
                    if (
                        (e1.m_locationInfo != null)
                            && (e2.m_locationInfo != null)) {
                        sort = e1.m_locationInfo.lineNumber - e2.m_locationInfo.lineNumber;
                    }
                    break;

                //other columns may be Property values - see if there is an Property value matching column name
                default:
                    if (e1.getProperty(columnName) != null && e2.getProperty(columnName) != null) {
                        sort = e1.getProperty(columnName).compareToIgnoreCase(e2.getProperty(columnName));
                    }
            }
        }

        sort = Integer.compare(sort, 0);

        if (!ascending && (sort != 0)) {
            sort = (sort < 0) ? 1 : (-1);
        }

        return sort;
    }