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 void selectionChanged() {
   TableItem[] items = fIdMapsTable.getSelection();
   if (items.length > 0) {
     // Refresh Mappings Table
     fMappingsTable.removeAll();
     Vector Mappings = ((IdMap) items[0].getData()).getMappings();
     for (Enumeration enumeration = Mappings.elements(); enumeration.hasMoreElements(); ) {
       newMappingsTableItem((Mapping) enumeration.nextElement(), false);
     }
     // Refresh Ordered Table
     fOrderedTable.removeAll();
     ArrayList Ordered = ((IdMap) items[0].getData()).getOrdered();
     if (Ordered != null) {
       for (Iterator iter_ordered = Ordered.iterator(); iter_ordered.hasNext(); ) {
         newOrderedTableItem((Mapping) iter_ordered.next(), false);
       }
     }
   }
   updateEnabledState();
 }