xstream的Converter的使用

static class ListConverter extends AbstractCollectionConverter {

         public ListConverter(Mapper mapper) {
                    super(mapper);
          }

          @Override
          public boolean canConvert(Class type) {
                   return type.equals(ArrayList.class);
           }

           @Override
          public void marshal(Object source, HierarchicalStreamWriter writer,
                       MarshallingContext context) {
                 List<String> list = (List<String>)source;  
                 ListIterator<String> iter = list.listIterator() ;
                 String value = null ;
                 while(iter.hasNext()){
                       value = iter.next() ;
                       ExtendedHierarchicalStreamWriterHelper.startNode(writer,"include",List.class); 
                       writer.setValue(value); 
                       writer.endNode(); 
            }
  }

  @Override
  public Object unmarshal(HierarchicalStreamReader reader,
        UnmarshallingContext context) {
                String nodename = reader.getNodeName() ;
                //System.out.println(nodename);
                List<String> list = new ArrayList<String>();
                while(reader.hasMoreChildren()){
                         reader.moveDown();
                      nodename = reader.getNodeName() ;
                      //System.out.println(nodename+"-->"+reader.getValue());
                      list.add(reader.getValue()) ;
                      reader.moveUp();
                 }
                 return list;
        }
 }