public void startElement()

in poi-ooxml/src/main/java/org/apache/poi/xssf/eventusermodel/XSSFSheetXMLHandler.java [197:301]
82 lines of code
31 McCabe index (conditional complexity)

    public void startElement(String uri, String localName, String qName,
                             Attributes attributes) throws SAXException {

        if (uri != null && !uri.equals(NS_SPREADSHEETML)) {
            return;
        }

        if (isTextTag(localName)) {
            vIsOpen = true;
            // Clear contents cache
            if (!isIsOpen) {
                value.setLength(0);
            }
        } else if ("is".equals(localName)) {
            // Inline string outer tag
            isIsOpen = true;
        } else if ("f".equals(localName)) {
            // Clear contents cache
            formula.setLength(0);

            // Mark us as being a formula if not already
            if (this.nextDataType == XSSFSheetXMLHandler.xssfDataType.NUMBER) {
                this.nextDataType = XSSFSheetXMLHandler.xssfDataType.FORMULA;
            }

            // Decide where to get the formula string from
            String type = attributes.getValue("t");
            if (type != null && type.equals("shared")) {
                // Is it the one that defines the shared, or uses it?
                String ref = attributes.getValue("ref");
                String si = attributes.getValue("si");

                if (ref != null) {
                    // This one defines it
                    // TODO Save it somewhere
                    fIsOpen = true;
                } else {
                    // This one uses a shared formula
                    // TODO Retrieve the shared formula and tweak it to
                    //  match the current cell
                    if (formulasNotResults) {
                        LOG.atWarn().log("shared formulas not yet supported!");
                    } /*else {
                   // It's a shared formula, so we can't get at the formula string yet
                   // However, they don't care about the formula string, so that's ok!
                }*/
                }
            } else {
                fIsOpen = true;
            }
        } else if ("oddHeader".equals(localName) || "evenHeader".equals(localName) ||
                "firstHeader".equals(localName) || "firstFooter".equals(localName) ||
                "oddFooter".equals(localName) || "evenFooter".equals(localName)) {
            hfIsOpen = true;
            // Clear contents cache
            headerFooter.setLength(0);
        } else if ("row".equals(localName)) {
            String rowNumStr = attributes.getValue("r");
            if (rowNumStr != null) {
                rowNum = Integer.parseInt(rowNumStr) - 1;
            } else {
                rowNum = nextRowNum;
            }
            output.startRow(rowNum);
        }
        // c => cell
        else if ("c".equals(localName)) {
            // Set up defaults.
            this.formula.setLength(0);
            this.nextDataType = xssfDataType.NUMBER;
            this.formatIndex = -1;
            this.formatString = null;
            cellRef = attributes.getValue("r");
            String cellType = attributes.getValue("t");
            String cellStyleStr = attributes.getValue("s");
            if ("b".equals(cellType))
                nextDataType = xssfDataType.BOOLEAN;
            else if ("e".equals(cellType))
                nextDataType = xssfDataType.ERROR;
            else if ("inlineStr".equals(cellType))
                nextDataType = xssfDataType.INLINE_STRING;
            else if ("s".equals(cellType))
                nextDataType = xssfDataType.SST_STRING;
            else if ("str".equals(cellType))
                nextDataType = xssfDataType.FORMULA;
            else {
                // Number, but almost certainly with a special style or format
                XSSFCellStyle style = null;
                if (stylesTable != null) {
                    if (cellStyleStr != null) {
                        int styleIndex = Integer.parseInt(cellStyleStr);
                        style = stylesTable.getStyleAt(styleIndex);
                    } else if (stylesTable.getNumCellStyles() > 0) {
                        style = stylesTable.getStyleAt(0);
                    }
                }
                if (style != null) {
                    this.formatIndex = style.getDataFormat();
                    this.formatString = style.getDataFormatString();
                    if (this.formatString == null)
                        this.formatString = BuiltinFormats.getBuiltinFormat(this.formatIndex);
                }
            }
        }
    }