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A convenient framework for toString()

/ Published in: Java
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  1. public static <T> Map<String,Object> formatArg(String name,T value)
  2.   {
  3.     if(name == null || value == null)
  4.     {
  5.       throw new IllegalArgumentException("either name " + name + " or value " + value + " was null.");
  6.     }
  7.     Map<String,Object> m = newHashMap();
  8.     m.put(Util.KEY_FORMAT_OBJECT_NAME,name);
  9.     m.put(Util.KEY_FORMAT_OBJECT_VALUE,value);
  10.     return m;
  11.   }
  12.  
  13.  public static <T> String formatObjectToString(
  14.           Class<T> clss,List<Map<String,Object>> maps)
  15.   {
  16.  
  17.     StringBuilder buf = new StringBuilder();
  18.     if(clss != null)
  19.     {
  20.       buf.append(clss.getName() + "\n");
  21.       for(Map<String,Object> map:maps)
  22.       {
  23.         String name = (String)map.get(KEY_FORMAT_OBJECT_NAME);
  24.         Object value = map.get(KEY_FORMAT_OBJECT_VALUE);
  25.         String id = name + "(" + value.getClass().getName() + ")";
  26.         buf.append(String.format("%1$-60s %2$s\n",id,value));
  27.       }
  28.     }
  29.     return buf.toString();
  30.   }

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