how can we use combos in jface tableviewer columns - eclipse

Question

I am reading excel data and taking headers(only first row) as my columns and added to list and this list is added as input to my tableviewer to display data in my table.I am creating tablecolumns and added the label provider. I am able to see the data in the table. Now i want to display the all textboxes as combos in each column . How can i can add combos for each column? my code is like
my tableviewer class
public class TableViewerExample {
public TableViewerExample(Shell shell) {
TableViewer viewer = new TableViewer(shell, SWT.BORDER | SWT.FULL_SELECTION);
TableViewerColumn upDownColumn = new TableViewerColumn(viewer, SWT.NONE);
upDownColumn.getColumn().setText("Display Order");
upDownColumn.getColumn().setWidth(200);
upDownColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public String getText(Object element) {
return ((DataSourceModel) element).getDisplayOrder();
}
});
TableViewerColumn checkboxColumn = new TableViewerColumn(viewer, SWT.NONE);
checkboxColumn.getColumn().setText("Checkbox Selection");
checkboxColumn.getColumn().setWidth(200);
checkboxColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public String getText(Object element) {
return ((DataSourceModel) element).getCheckboxSelection();
}
});
TableViewerColumn uniqueFieldsColumn = new TableViewerColumn(viewer, SWT.NONE);
uniqueFieldsColumn.getColumn().setText("Unique Fields");
uniqueFieldsColumn.getColumn().setWidth(200);
uniqueFieldsColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public String getText(Object element) {
return ((DataSourceModel) element).getUniqueFields();
}
});
TableViewerColumn inputFieldNameColumn = new TableViewerColumn(viewer, SWT.NONE);
inputFieldNameColumn.getColumn().setText("Input Field Name");
inputFieldNameColumn.getColumn().setWidth(200);
inputFieldNameColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public String getText(Object element) {
return ((DataSourceModel) element).getInputFieldName();
}
});
TableViewerColumn dataTypeColumn = new TableViewerColumn(viewer, SWT.NONE);
dataTypeColumn.getColumn().setText("Data Type");
dataTypeColumn.getColumn().setWidth(200);
dataTypeColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public String getText(Object element) {
return ((DataSourceModel) element).getDataType();
}
});
TableViewerColumn inputFieldFormatColumn = new TableViewerColumn(viewer, SWT.NONE);
inputFieldFormatColumn.getColumn().setText("Input Field Format");
inputFieldFormatColumn.getColumn().setWidth(200);
inputFieldFormatColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public String getText(Object element) {
return ((DataSourceModel) element).getInputFieldFormat();
}
});
TableViewerColumn displayNameColumn = new TableViewerColumn(viewer, SWT.NONE);
displayNameColumn.getColumn().setText("Display Name");
displayNameColumn.getColumn().setWidth(200);
displayNameColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public String getText(Object element) {
return ((DataSourceModel) element).getDisplayName();
}
});
TableViewerColumn displayFormatColumn = new TableViewerColumn(viewer, SWT.NONE);
displayFormatColumn.getColumn().setText("Display Format");
displayFormatColumn.getColumn().setWidth(200);
displayFormatColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public String getText(Object element) {
return ((DataSourceModel) element).getDisplayFormat();
}
});
viewer.setContentProvider(ArrayContentProvider.getInstance());
System.out.println(RetrieveExcelData.getDataSourceFieldsList());
viewer.setInput(RetrieveExcelData.getDataSourceFieldsList());
viewer.getTable().setLinesVisible(true);
viewer.getTable().setHeaderVisible(true);
}
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
new TableViewerExample(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
setinput class
public class RetrieveExcelData {
public static List getDataSourceFieldsList() {
String filename = "D:\\ServiceOrders_point_Org_morethan500.xlsx";
List<List<XSSFCell>> sheetData = new ArrayList<>();
try (FileInputStream fis = new FileInputStream(filename)) {
XSSFWorkbook workbook = new XSSFWorkbook(fis);
XSSFSheet myExcelSheet = workbook.getSheetAt(0);
XSSFRow row = (XSSFRow )myExcelSheet.getRow(0);
Iterator cells=row.cellIterator();
List<XSSFCell> data = new ArrayList<>();
while (cells.hasNext()) {
XSSFCell cell = (XSSFCell) cells.next();
data.add(cell);
}
sheetData.add(data);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return showExcelData(sheetData);
}
private static List showExcelData(List<List<XSSFCell>> sheetData) {
List<DataSourceModel> resultList = new ArrayList();
// Iterates the data and print it out to the console.
for (List<XSSFCell> data : sheetData) {
for (XSSFCell cell : data) {
DataSourceModel dataSourceModel=new DataSourceModel(cell.getStringCellValue(), cell.getStringCellValue(), cell.getStringCellValue(), cell.getStringCellValue(), cell.getStringCellValue(), cell.getStringCellValue(), cell.getStringCellValue(), cell.getStringCellValue());
resultList.add(dataSourceModel);
}
}
return resultList;
}
my model class
public class DataSourceModel {
private String displayOrder;
private String checkboxSelection;
private String uniqueFields;
private String inputFieldName;
private String dataType;
private String inputFieldFormat;
private String displayName;
private String displayFormat;
public DataSourceModel(String displayOrder,String checkboxSelection,String uniqueFields,String inputFieldName,String dataType, String inputFieldFormat, String displayName,String displayFormat) {
this.displayOrder=displayOrder;
this.checkboxSelection=checkboxSelection;
this.uniqueFields=uniqueFields;
this.inputFieldName=inputFieldName;
this.dataType=dataType;
this.inputFieldFormat=inputFieldFormat;
this.displayName=displayName;
this.displayFormat=displayFormat;
}
public String getDisplayOrder() {
return displayOrder;
}
public void setDisplayOrder(String displayOrder) {
this.displayOrder = displayOrder;
}
public String getCheckboxSelection() {
return checkboxSelection;
}
public void setCheckboxSelection(String checkboxSelection) {
this.checkboxSelection = checkboxSelection;
}
public String getUniqueFields() {
return uniqueFields;
}
public void setUniqueFields(String uniqueFields) {
this.uniqueFields = uniqueFields;
}
public String getInputFieldName() {
return inputFieldName;
}
public void setInputFieldName(String inputFieldName) {
this.inputFieldName = inputFieldName;
}
public String getDataType() {
return dataType;
}
public void setDataType(String dataType) {
this.dataType = dataType;
}
public String getInputFieldFormat() {
return inputFieldFormat;
}
public void setInputFieldFormat(String inputFieldFormat) {
this.inputFieldFormat = inputFieldFormat;
}
public String getDisplayName() {
return displayName;
}
public void setDisplayName(String displayName) {
this.displayName = displayName;
}
public String getDisplayFormat() {
return displayFormat;
}
public void setDisplayFormat(String displayFormat) {
this.displayFormat = displayFormat;
}
and the table looks like
Now i want to make combos instead of text in the columns . Colud you please help how can i change to combos instead of text boxes using my code for all