version2/src/C/KeyValue.cc

   1
   2 /**
   3  * KeyValue entry for Slot.
   4  * @author Brian Demsky <bdemsky@uci.edu>
   5  * @version 1.0
   6  */
   7
   8 class KeyValue { /*extends Entry */
   9         IoTString key;
  10         IoTString value;
  11
  12         KeyValue(IoTString _key, IoTString _value) {
  13                 key = _key;
  14                 value = _value;
  15         }
  16
  17         IoTString getKey() {
  18                 return key;
  19         }
  20
  21         IoTString getValue() {
  22                 return value;
  23         }
  24
  25         static KeyValue decode(ByteBuffer bb) {
  26                 int keylength = bb.getInt();
  27                 int valuelength = bb.getInt();
  28                 char[] key = new char[keylength];
  29                 bb.get(key);
  30
  31                 if (valuelength != 0) {
  32                         char[] value = new char[valuelength];
  33                         bb.get(value);
  34                         return new KeyValue(IoTString.shallow(key), IoTString.shallow(value));
  35                 }
  36
  37                 return new KeyValue(IoTString.shallow(key), NULL);
  38         }
  39
  40         void encode(ByteBuffer bb) {
  41                 bb.putInt(key.length());
  42
  43                 if (value != NULL) {
  44                         bb.putInt(value.length());
  45                 } else {
  46                         bb.putInt(0);
  47                 }
  48
  49                 bb.put(key.internalBytes());
  50
  51                 if (value != NULL) {
  52                         bb.put(value.internalBytes());
  53                 }
  54         }
  55
  56         int getSize() {
  57                 if (value != NULL) {
  58                         return 2 * sizeof(int32_t) + key.length() + value.length();
  59                 }
  60
  61                 return 2 * sizeof(int32_t) + key.length();
  62         }
  63
  64         String toString() {
  65                 if (value == NULL) {
  66                         return "NULL";
  67                 }
  68                 return value.toString();
  69         }
  70
  71         KeyValue getCopy() {
  72                 return new KeyValue(key, value);
  73         }
  74 }