src/java/iotcloud/KeyValue.java

   1 package iotcloud;
   2 import java.nio.ByteBuffer;
   3
   4 /**
   5  * KeyValue entry for Slot.
   6  * @author Brian Demsky <bdemsky@uci.edu>
   7  * @version 1.0
   8  */
   9
  10 class KeyValue extends Entry {
  11         private IoTString key;
  12         private IoTString value;
  13
  14         KeyValue(Slot slot, IoTString _key, IoTString _value) {
  15                 super(slot);
  16                 key=_key;
  17                 value=_value;
  18         }
  19
  20         IoTString getKey() {
  21                 return key;
  22         }
  23
  24         IoTString getValue() {
  25                 return value;
  26         }
  27
  28         static Entry decode(Slot slot, ByteBuffer bb) {
  29                 int keylength=bb.getInt();
  30                 int valuelength=bb.getInt();
  31                 byte[] key=new byte[keylength];
  32                 byte[] value=new byte[valuelength];
  33                 bb.get(key);
  34                 bb.get(value);
  35                 return new KeyValue(slot, IoTString.shallow(key), IoTString.shallow(value));
  36         }
  37
  38         void encode(ByteBuffer bb) {
  39                 bb.put(Entry.TypeKeyValue);
  40                 bb.putInt(key.length());
  41                 bb.putInt(value.length());
  42                 bb.put(key.internalBytes());
  43                 bb.put(value.internalBytes());
  44         }
  45
  46         int getSize() {
  47                 return 2*Integer.BYTES+key.length()+value.length()+Byte.BYTES;
  48         }
  49
  50         byte getType() {
  51                 return Entry.TypeKeyValue;
  52         }
  53 }