private void editIdMap(Shell shell) {
    TableItem[] items = fIdMapsTable.getSelection();
    if (items.length > 0) {
      IdMap idmap = (IdMap) items[0].getData();
      XMLCompareEditCopyIdMapDialog dialog =
          new XMLCompareEditCopyIdMapDialog(shell, idmap, fIdMaps, fIdMapsInternal);
      if (dialog.open() == Window.OK) {
        String new_idmapName = dialog.getResult();
        if (!fIdMaps.containsKey(new_idmapName)) {
          // copy over id mappings
          Vector newMappings = new Vector();
          IdMap newIdMap = new IdMap(new_idmapName, false, newMappings);
          HashMap newIdmapHM = new HashMap();
          fIdMaps.put(newIdMap.getName(), newIdmapHM);
          Vector Mappings = idmap.getMappings();
          for (Enumeration enumeration = Mappings.elements(); enumeration.hasMoreElements(); ) {
            Mapping mapping = (Mapping) enumeration.nextElement();
            Mapping newMapping =
                new Mapping(mapping.getElement(), mapping.getSignature(), mapping.getIdAttribute());
            newMappings.add(newMapping);
            newIdmapHM.put(newMapping.getKey(), newMapping.getIdAttribute());
          }
          // copy over ordered entries
          ArrayList orderedAL = idmap.getOrdered();
          if (orderedAL != null && orderedAL.size() > 0) {
            ArrayList newOrderedAL = new ArrayList();
            newIdMap.setOrdered(newOrderedAL);
            ArrayList idmapOrdered = new ArrayList();
            fOrderedElements.put(newIdMap.getName(), idmapOrdered);
            for (Iterator iter = orderedAL.iterator(); iter.hasNext(); ) {
              Mapping ordered = (Mapping) iter.next();
              Mapping newOrdered = new Mapping(ordered.getElement(), ordered.getSignature());
              newOrderedAL.add(newOrdered);
              idmapOrdered.add(newOrdered.getKey());
            }
          }

          newIdMapsTableItem(newIdMap, true);
          selectionChanged();
        }
      }
    }
  }
  protected TableItem newOrderedTableItem(Mapping mapping, boolean selected) {
    TableItem[] items = fOrderedTable.getItems();
    int i = 0;
    while (i < items.length && mapping.getElement().compareToIgnoreCase(items[i].getText(0)) > 0)
      i++;

    TableItem item = new TableItem(fOrderedTable, SWT.NULL, i);

    String[] values = new String[] {mapping.getElement(), mapping.getSignature()};
    item.setText(values);
    item.setData(mapping);
    if (selected) fOrderedTable.setSelection(i);

    return item;
  }
  protected TableItem newMappingsTableItem(Mapping mapping, boolean selected) {
    TableItem[] items = fMappingsTable.getItems();
    int i = 0;
    while (i < items.length && mapping.getElement().compareToIgnoreCase(items[i].getText(0)) > 0)
      i++;
    TableItem item = new TableItem(fMappingsTable, SWT.NULL, i);
    String idtext = mapping.getIdAttribute();
    String idtype;
    if (idtext.charAt(0) == XMLStructureCreator.ID_TYPE_BODY) {
      idtext = idtext.substring(1, idtext.length());
      idtype = IDTYPE_CHILDBODY;
    } else idtype = IDTYPE_ATTRIBUTE;

    String[] values = new String[] {mapping.getElement(), mapping.getSignature(), idtext, idtype};
    item.setText(values);
    item.setData(mapping);
    if (selected) fMappingsTable.setSelection(i);

    return item;
  }