src/be/nikiroo/utils/serial/CustomSerializer.java

   1 package be.nikiroo.utils.serial;
   2
   3 public abstract class CustomSerializer {
   4
   5         protected abstract String toString(Object value);
   6
   7         protected abstract Object fromString(String content);
   8
   9         protected abstract String getType();
  10
  11         /**
  12          * Encode the object into the given builder if possible (if supported).
  13          *
  14          * @param builder
  15          *            the builder to append to
  16          * @param value
  17          *            the object to encode
  18          * @return TRUE if success, FALSE if not (the content of the builder won't
  19          *         be changed in case of failure)
  20          */
  21         public boolean encode(StringBuilder builder, Object value) {
  22                 int prev = builder.length();
  23                 String customString = toString(value);
  24                 builder.append("custom:").append(getType()).append(":");
  25                 if (!SerialUtils.encode(builder, customString)) {
  26                         builder.delete(prev, builder.length());
  27                         return false;
  28                 }
  29
  30                 return true;
  31         }
  32
  33         public Object decode(String encodedValue) {
  34                 return fromString((String) SerialUtils.decode(contentOf(encodedValue)));
  35         }
  36
  37         public static boolean isCustom(String encodedValue) {
  38                 int pos1 = encodedValue.indexOf(':');
  39                 int pos2 = encodedValue.indexOf(':', pos1 + 1);
  40
  41                 return pos1 >= 0 && pos2 >= 0 && encodedValue.startsWith("custom:");
  42         }
  43
  44         public static String typeOf(String encodedValue) {
  45                 int pos1 = encodedValue.indexOf(':');
  46                 int pos2 = encodedValue.indexOf(':', pos1 + 1);
  47                 String type = encodedValue.substring(pos1 + 1, pos2);
  48
  49                 return type;
  50         }
  51
  52         public static String contentOf(String encodedValue) {
  53                 int pos1 = encodedValue.indexOf(':');
  54                 int pos2 = encodedValue.indexOf(':', pos1 + 1);
  55                 String encodedContent = encodedValue.substring(pos2 + 1);
  56
  57                 return encodedContent;
  58         }
  59 }