|  |  | 
 |  |  |       List<PrefixedDataAvailable> list = pool.get(className) ; | 
 |  |  |       if(list == null){ | 
 |  |  |          list = new ArrayList<>() ; | 
 |  |  |       }else{ | 
 |  |  |          pool.put(className, list) ; | 
 |  |  |       }else if(list.size() > 0){ | 
 |  |  |          obj = list.get(0) ; | 
 |  |  |          list.remove(0) ; | 
 |  |  |       } | 
 |  |  |        | 
 |  |  |       if(obj != null){ | 
 |  |  |          list.remove(0) ; | 
 |  |  |          return obj ; | 
 |  |  |       }else{ | 
 |  |  |       if(obj == null){ | 
 |  |  |          try { | 
 |  |  |             obj = (PrefixedDataAvailable)clazz.getDeclaredConstructor().newInstance() ; | 
 |  |  |             //obj = (PrefixedDataAvailable)clazz.newInstance(); | 
 |  |  |          } catch (Exception e) { | 
 |  |  |             throw new Exception( "由" + className + "生成实例失败!"); | 
 |  |  |          } | 
 |  |  |          return obj ; | 
 |  |  |       } | 
 |  |  |       return obj ; | 
 |  |  |    } | 
 |  |  |     | 
 |  |  |    /** |