}
if (!sb.toString().equals("")) return sb.toString();
if (extension.equals("parx")) return sb.toString();
if (extension.equals("refx")) return sb.toString();
IElement element = elementFactory.createElement(file, WorkFileExtension.getClassName(extension));
LinkedList<XMLElement> xmlElement2List = element.getXMLElementList();
clearCharacters(xmlElement1List);
clearCharacters(xmlElement2List);
if (!xmlElement1List.equals(xmlElement2List)){
while (!xmlElement1List.isEmpty()){
XMLElement xmlElement1 = xmlElement1List.poll();