public class MyTable extends AbstractTable {

    public class EmailColumn extends AbstractStringColumn {

      @Override
      protected boolean getConfiguredHtmlEnabled() {
        return true;
      }

      @Override
      protected void execDecorateCell(Cell cell, ITableRow row) {
        cell.setText(HTML.appLink(getValue(row), getValue(row)).toHtml());
      }
    }

    @Override
    protected void execAppLinkAction(String ref) {
      System.out.println("E-Mail: " + ref);
    }
}