Sorting multiple columns at a time

Hi All,
I have requirement which is web dynpro table loading with the data i need to sort the three columns
at a time. initially this sorted data is coming from Function module, but now the data is coming from BW to Web dynpro java
I have one method in sort class which will sort the table on one column at time. i need help in enhancing this method to work for three columns.
public void sort(String columnId, IWDNode dataSource) {
       IWDTableColumn column =
            (IWDTableColumn) table.getView().getElement(columnId);
       ReversableComparator reversable =
            (ReversableComparator) comparatorForColumn.get(column);
       if (reversable == null)
            return; // not a sortable column
       // remove icon of previously sorted column
       if (currentlySortedColumn != null
            && currentlySortedColumn.getHeader() != null)
            currentlySortedColumn.getHeader().setImageSource(null);
       // bookkeeping
       if (column == currentlySortedColumn) {
            //               reversable.toggleReversed();
       currentlySortedColumn = column;
       // set icon in currently sorted column
       /*if (currentlySortedColumn.getHeader() != null)
            currentlySortedColumn.getHeader().setImageSource(
                 reversable.isReversed()
                      ? "~sapicons/s_b_srtd.GIF"
                      : "~sapicons/s_b_srtu.GIF");
       // sorting
       dataSource.sortElements(reversable);
Regards,
Lakshmi Kodavati

Hi all,
The solution for EP6.40 Multiple column sorter
Class file:
http://wiki.sdn.sap.com/wiki/display/Snippets/Tablesorterbymultiplecolumns%28WebDynproJava%29
f you does not have WDTableColumnSortDirection try to modify the MultiAttributesNodeComparator and replace WDTableColumnSortDirection with the boolean flag-indicator of the sorting direction. Like this:
boolean sortAsc = true; // WDTableColumnSortDirection.UP
Call this class from web dynpro view
final MultiAttributesNodeComparator nodeComparator = new MultiAttributesNodeComparator();
nodeComparator.sortElements(new String[] {"InvoiceDate","Invoice","Contract"}, true, wdContext.nodeInvoiceListTable());
Thanks for Siarhei_Pisarenka
Edited by: narayana on Mar 25, 2010 10:02 AM
Edited by: narayana on Mar 25, 2010 10:05 AM

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Below the url for more info,
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