public HSSFSeries createSeries()

in poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFChart.java [1149:1268]
94 lines of code
27 McCabe index (conditional complexity)

    public HSSFSeries createSeries() throws Exception {
        ArrayList<RecordBase> seriesTemplate = new ArrayList<>();
        boolean seriesTemplateFilled = false;

        int idx = 0;
        int deep = 0;
        int chartRecordIdx = -1;
        int chartDeep = -1;
        int lastSeriesDeep = -1;
        int endSeriesRecordIdx = -1;
        int seriesIdx = 0;
        final List<RecordBase> records = sheet.getSheet().getRecords();

        /* store first series as template and find last series index */
        for(final RecordBase record : records) {

            idx++;

            if (record instanceof BeginRecord) {
                deep++;
            } else if (record instanceof EndRecord) {
                deep--;

                if (lastSeriesDeep == deep) {
                    lastSeriesDeep = -1;
                    endSeriesRecordIdx = idx;
                    if (!seriesTemplateFilled) {
                        seriesTemplate.add(record);
                        seriesTemplateFilled = true;
                    }
                }

                if (chartDeep == deep) {
                    break;
                }
            }

            if (record instanceof ChartRecord) {
                if (record == chartRecord) {
                    chartRecordIdx = idx;
                    chartDeep = deep;
                }
            } else if (record instanceof SeriesRecord) {
                if (chartRecordIdx != -1) {
                    seriesIdx++;
                    lastSeriesDeep = deep;
                }
            }

            if (lastSeriesDeep != -1 && !seriesTemplateFilled) {
                seriesTemplate.add(record) ;
            }
        }

        /* check if a series was found */
        if (endSeriesRecordIdx == -1) {
            return null;
        }

        /* next index in the records list where the new series can be inserted */
        idx = endSeriesRecordIdx + 1;

        HSSFSeries newSeries = null;

        /* duplicate record of the template series */
        ArrayList<RecordBase> clonedRecords = new ArrayList<>();
        for(final RecordBase record : seriesTemplate) {

            Record newRecord = null;

            if (record instanceof BeginRecord) {
                newRecord = new BeginRecord();
            } else if (record instanceof EndRecord) {
                newRecord = new EndRecord();
            } else if (record instanceof SeriesRecord) {
                SeriesRecord seriesRecord = ((SeriesRecord) record).copy();
                newSeries = new HSSFSeries(seriesRecord);
                newRecord = seriesRecord;
            } else if (record instanceof LinkedDataRecord) {
                LinkedDataRecord linkedDataRecord = ((LinkedDataRecord) record).copy();
                if (newSeries != null) {
                    newSeries.insertData(linkedDataRecord);
                }
                newRecord = linkedDataRecord;
            } else if (record instanceof DataFormatRecord) {
                DataFormatRecord dataFormatRecord = ((DataFormatRecord) record).copy();

                dataFormatRecord.setSeriesIndex((short) seriesIdx) ;
                dataFormatRecord.setSeriesNumber((short) seriesIdx) ;

                newRecord = dataFormatRecord;
            } else if (record instanceof SeriesTextRecord) {
                SeriesTextRecord seriesTextRecord = ((SeriesTextRecord) record).copy();
                if (newSeries != null) {
                    newSeries.setSeriesTitleText(seriesTextRecord);
                }
                newRecord = seriesTextRecord;
            } else if (record instanceof Record) {
                newRecord = ((Record) record).copy();
            }

            if (newRecord != null)
            {
                clonedRecords.add(newRecord);
            }
        }

        /* check if a user model series object was created */
        if (newSeries == null)
        {
            return null;
        }

        /* transfer series to record list */
        for(final RecordBase record : clonedRecords) {
            records.add(idx++, record);
        }

        return newSeries;
    }