public void addSelectedFilesToTargetList() {
    ISelection selection = sourceFileViewer.getSelection();

    if (isValidSourceFileViewerSelection(selection)) {
      java.util.List list = null;
      if (selection instanceof IStructuredSelection) {
        list = ((IStructuredSelection) selection).toList();

        if (list != null) {
          list = ((IStructuredSelection) selection).toList();
          for (Iterator i = list.iterator(); i.hasNext(); ) {
            IResource resource = (IResource) i.next();
            if (resource instanceof IFile) {
              // Check if its in the list. Don't add it if it is.
              String resourceName = resource.getFullPath().toString();
              if (selectedListBox.indexOf(resourceName) == -1) selectedListBox.add(resourceName);
            }
          }
          setFiles(selectedListBox.getItems());
        }

        setAddButtonEnabled(false);

        if (selectedListBox.getItemCount() > 0) {
          removeAllButton.setEnabled(true);
          if (isFileMandatory) setPageComplete(true);
          if (selectedListBox.getSelectionCount() > 0) setRemoveButtonEnabled(true);
          else setRemoveButtonEnabled(false);
        }
      }
    }
  }
 protected Object[] getSelectedElements() {
   return ((IStructuredSelection) treeViewer.getSelection()).toArray();
 }