ff.java

void ff(MessageUnpacker unpacker) {
  try{
    while (unpacker.hasNext()) {
      // [Advanced] You can check the detailed data format with getNextFormat()
      // Here is a list of message pack data format: https://github.com/msgpack/msgpack/blob/master/spec.md#overview
      MessageFormat format = unpacker.getNextFormat();
    
      // You can also use unpackValue to extract a value of any type
      Value v = unpacker.unpackValue();
      switch (v.getValueType()) {
        case NIL:
          v.isNilValue(); // true
          println("read nil");
          break;
        case BOOLEAN:
          boolean b = v.asBooleanValue().getBoolean();
          println("read boolean: " + b);
          break;
        case INTEGER:
          IntegerValue iv = v.asIntegerValue();
          if (iv.isInIntRange()) {
            int i = iv.toInt();
            println("read int: " + i);
          }
          else if (iv.isInLongRange()) {
            long l = iv.toLong();
            println("read long: " + l);
          }
          else {
            BigInteger i = iv.toBigInteger();
            println("read long: " + i);
          }
          break;
        case FLOAT:
          FloatValue fv = v.asFloatValue();
          float f = fv.toFloat();   // use as float
          double d = fv.toDouble(); // use as double
          println("read float: " + d);
          break;
        case STRING:
          String s = v.asStringValue().asString();
          println("read string: " + s);
          break;
        case BINARY:
          byte[] mb = v.asBinaryValue().asByteArray();
          println("read binary: size=" + mb.length);
          break;
        case ARRAY:
          ArrayValue a = v.asArrayValue();
          for (Value e : a) {
            println("read array element: " + e);
          }
          break;
        case MAP:
          int length = unpacker.unpackMapHeader();
          for (int i = 0; i < length; i++) {
            unpacker.unpackString(); //key
            unpacker.unpackString(); //value
          }
          break;
        case EXTENSION:
          ExtensionValue ev = v.asExtensionValue();
          byte extType = ev.getType();
          byte[] extValue = ev.getData();
          break;
      }
    }
  } catch(IOException e) {
    println("ERROR");
  }
}