How to Add negative value for DataBar in apache poi? - apache-poi

Question

i used this code to create a databar :
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFDataBarFormatting;
import org.apache.poi.ss.util.CellRangeAddress;
import java.io.FileOutputStream;
import java.lang.reflect.Field;
public class ConditionalFormattingDataBars {
public static void applyDataBars(SheetConditionalFormatting sheetCF, String region, ExtendedColor color) throws Exception {
CellRangeAddress[] regions = { CellRangeAddress.valueOf(region) };
ConditionalFormattingRule rule = sheetCF.createConditionalFormattingRule(color);
DataBarFormatting dbf = rule.getDataBarFormatting();
dbf.getMinThreshold().setRangeType(ConditionalFormattingThreshold.RangeType.MIN);
dbf.getMaxThreshold().setRangeType(ConditionalFormattingThreshold.RangeType.MAX);
dbf.setWidthMin(0); //cannot work for XSSFDataBarFormatting, see https://svn.apache.org/viewvc/poi/tags/REL_4_0_1/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFDataBarFormatting.java?view=markup#l57
dbf.setWidthMax(100); //cannot work for XSSFDataBarFormatting, see https://svn.apache.org/viewvc/poi/tags/REL_4_0_1/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFDataBarFormatting.java?view=markup#l64
if (dbf instanceof XSSFDataBarFormatting) {
Field _databar = XSSFDataBarFormatting.class.getDeclaredField("_databar");
_databar.setAccessible(true);
org.openxmlformats.schemas.spreadsheetml.x2006.main.CTDataBar ctDataBar =
(org.openxmlformats.schemas.spreadsheetml.x2006.main.CTDataBar)_databar.get(dbf);
ctDataBar.setMinLength(0);
ctDataBar.setMaxLength(100);
}
sheetCF.addConditionalFormatting(regions, rule);
}
public static void main(String[] args) throws Exception {
Workbook workbook = new XSSFWorkbook();
Sheet sheet = workbook.createSheet("new sheet");
java.util.List<Double> list = java.util.Arrays.asList(0.279, 0.252, 0.187, 0.128, 0.078, 0.043, 0.022, 0.012, 0.011, 0.0, 0.0);
for (int i = 0; i < list.size(); i++) {
sheet.createRow(i+1).createCell(1).setCellValue(list.get(i));
}
SheetConditionalFormatting sheetCF = sheet.getSheetConditionalFormatting();
ExtendedColor color = workbook.getCreationHelper().createExtendedColor();
color.setARGBHex("FF80C279");
applyDataBars(sheetCF, "B2:B12", color);
sheet.setColumnWidth(1, 50*256);
FileOutputStream out = new FileOutputStream("ConditionalFormattingDataBars.xlsx");
workbook.write(out);
out.close();
workbook.close();
}
}
And i fond it on the question provided Hear
And it is working !
However i tried to modify it to add negative value Like This :
but i did not fond any Class Or Object To do this !
is this even possible ?

Answer 1

This is a similar problem as this one: How to make solid color for databar in apache.poi.
The settings for negative values in data bars were not available when Office Open XML was published. It is a later added feature. Since apache poi uses the published features of Office Open XML only, this feature is not available directly. Also it is not available using the underlying org.openxmlformats.schemas.spreadsheetml.x2006.main.* classes as those also only are created from published Office Open XML.
How to see this? All Office Open XML files are ZIP archives. One can unzip them and have a look at the XML. So we set data bar settings as needed in Excel and save the *.xlsx file. Then we unzip the *.xlsx file and have a look at /xl/worksheets/sheet1.xml. There we find the settings for conditional formatting.
So we only can solve this problem the same way as in the linked answer above.
Complete example:
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFDataBarFormatting;
import org.apache.poi.xssf.usermodel.XSSFConditionalFormattingRule;
import org.apache.poi.ss.util.CellRangeAddress;
import java.io.FileOutputStream;
import java.lang.reflect.Field;
public class ConditionalFormattingDataBars {
public static void applyDataBars(SheetConditionalFormatting sheetCF, String region, ExtendedColor colorPos, ExtendedColor colorNeg) throws Exception {
CellRangeAddress[] regions = { CellRangeAddress.valueOf(region) };
ConditionalFormattingRule rule = sheetCF.createConditionalFormattingRule(colorPos);
DataBarFormatting dbf = rule.getDataBarFormatting();
dbf.getMinThreshold().setRangeType(ConditionalFormattingThreshold.RangeType.MIN);
dbf.getMaxThreshold().setRangeType(ConditionalFormattingThreshold.RangeType.MAX);
dbf.setWidthMin(0); //cannot work for XSSFDataBarFormatting, see https://svn.apache.org/viewvc/poi/tags/REL_4_0_1/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFDataBarFormatting.java?view=markup#l57
dbf.setWidthMax(100); //cannot work for XSSFDataBarFormatting, see https://svn.apache.org/viewvc/poi/tags/REL_4_0_1/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFDataBarFormatting.java?view=markup#l64
if (dbf instanceof XSSFDataBarFormatting) {
Field _databar = XSSFDataBarFormatting.class.getDeclaredField("_databar");
_databar.setAccessible(true);
org.openxmlformats.schemas.spreadsheetml.x2006.main.CTDataBar ctDataBar =
(org.openxmlformats.schemas.spreadsheetml.x2006.main.CTDataBar)_databar.get(dbf);
ctDataBar.setMinLength(0);
ctDataBar.setMaxLength(100);
}
// use extension from x14 namespace to set data bars having setting for negative value
if (rule instanceof XSSFConditionalFormattingRule) {
Field _cfRule = XSSFConditionalFormattingRule.class.getDeclaredField("_cfRule");
_cfRule.setAccessible(true);
org.openxmlformats.schemas.spreadsheetml.x2006.main.CTCfRule ctRule =
(org.openxmlformats.schemas.spreadsheetml.x2006.main.CTCfRule)_cfRule.get(rule);
org.openxmlformats.schemas.spreadsheetml.x2006.main.CTExtensionList extList =
ctRule.addNewExtLst();
org.openxmlformats.schemas.spreadsheetml.x2006.main.CTExtension ext = extList.addNewExt();
String extXML =
"<x14:id"
+ " xmlns:x14=\"http://schemas.microsoft.com/office/spreadsheetml/2009/9/main\">"
+ "{00000000-000E-0000-0000-000001000000}"
+ "</x14:id>";
org.apache.xmlbeans.XmlObject xlmObject = org.apache.xmlbeans.XmlObject.Factory.parse(extXML);
ext.set(xlmObject);
ext.setUri("{B025F937-C7B1-47D3-B67F-A62EFF666E3E}");
Field _sh = XSSFConditionalFormattingRule.class.getDeclaredField("_sh");
_sh.setAccessible(true);
XSSFSheet sheet = (XSSFSheet)_sh.get(rule);
extList = sheet.getCTWorksheet().addNewExtLst();
ext = extList.addNewExt();
extXML =
"<x14:conditionalFormattings xmlns:x14=\"http://schemas.microsoft.com/office/spreadsheetml/2009/9/main\">"
+ "<x14:conditionalFormatting xmlns:xm=\"http://schemas.microsoft.com/office/excel/2006/main\">"
+ "<x14:cfRule type=\"dataBar\" id=\"{00000000-000E-0000-0000-000001000000}\">"
+ "<x14:dataBar minLength=\"" + 0 + "\" maxLength=\"" + 100 + "\" border=\"1\" negativeBarBorderColorSameAsPositive=\"0\">"
+ "<x14:cfvo type=\"min\"/>"
+ "<x14:cfvo type=\"max\"/>"
+ "<x14:borderColor rgb=\"" + colorPos.getARGBHex() + "\"/>"
+ "<x14:negativeFillColor rgb=\"" + colorNeg.getARGBHex() + "\"/>"
+ "<x14:negativeBorderColor rgb=\"" + colorNeg.getARGBHex() + "\"/>"
+ "<x14:axisColor theme=\"1\"/>"
+ "</x14:dataBar>"
+ "</x14:cfRule>"
+ "<xm:sqref>" + region + "</xm:sqref>"
+ "</x14:conditionalFormatting>"
+ "</x14:conditionalFormattings>";
xlmObject = org.apache.xmlbeans.XmlObject.Factory.parse(extXML);
ext.set(xlmObject);
ext.setUri("{78C0D931-6437-407d-A8EE-F0AAD7539E65}");
}
sheetCF.addConditionalFormatting(regions, rule);
}
public static void main(String[] args) throws Exception {
Workbook workbook = new XSSFWorkbook();
Sheet sheet = workbook.createSheet("new sheet");
java.util.List<Double> list = java.util.Arrays.asList(0.279, -0.252, 0.187, -0.128, 0.078, 0.043, -0.022, 0.012, 0.011, 0.0, 0.0);
for (int i = 0; i < list.size(); i++) {
sheet.createRow(i+1).createCell(1).setCellValue(list.get(i));
}
SheetConditionalFormatting sheetCF = sheet.getSheetConditionalFormatting();
ExtendedColor colorPos = workbook.getCreationHelper().createExtendedColor();
colorPos.setARGBHex("FF80C279");
ExtendedColor colorNeg = workbook.getCreationHelper().createExtendedColor();
colorNeg.setARGBHex("FFFF0000");
applyDataBars(sheetCF, "B2:B12", colorPos, colorNeg);
sheet.setColumnWidth(1, 50*256);
FileOutputStream out = new FileOutputStream("ConditionalFormattingDataBars.xlsx");
workbook.write(out);
out.close();
workbook.close();
}
}
This code will only work properly always for new created XSSFWorkbook. If the XSSFWorkbook was created from an existing workbook, the this could contain org.openxmlformats.schemas.spreadsheetml.x2006.main.CTExtensionList for x14 extensions already. If so, then these must be taken into account. But that would be a much more complex and challenging project.