示例#1
0
 @Override
 public void readFields(DataInput input) throws IOException {
   int encodedByteLengthAndBool = WritableUtils.readVInt(input);
   int byteLength = Math.abs(encodedByteLengthAndBool) - 1;
   this.byteValue = new byte[byteLength];
   input.readFully(byteValue, 0, byteLength);
   int sortOrderAndDeterminism = WritableUtils.readVInt(input);
   if (sortOrderAndDeterminism <= 2) {
     // client is on an older version
     this.determinism = encodedByteLengthAndBool > 0 ? Determinism.ALWAYS : Determinism.PER_ROW;
     this.sortOrder = SortOrder.fromSystemValue(sortOrderAndDeterminism);
     ;
   } else {
     int determinismOrdinal = (sortOrderAndDeterminism >> 2) - 1;
     this.determinism = Determinism.values()[determinismOrdinal];
     int sortOrderValue =
         sortOrderAndDeterminism & ((1 << 2) - 1); // get the least 2 significant bits
     this.sortOrder = SortOrder.fromSystemValue(sortOrderValue);
   }
   int typeOrdinal = WritableUtils.readVInt(input);
   if (typeOrdinal < 0) {
     this.type = null;
   } else {
     this.type = PDataType.values()[typeOrdinal];
   }
   if (this.byteValue.length == 0) {
     this.value = null;
   } else {
     this.value = this.type.toObject(byteValue, 0, byteValue.length, this.type, sortOrder);
   }
 }
 @Override
 public void readFields(DataInput input) throws IOException {
   // read/write type ordinal, maxLength presence, scale presence and isNullable bit together to
   // save space
   int typeAndFlag = WritableUtils.readVInt(input);
   isNullable = (typeAndFlag & 0x01) != 0;
   if ((typeAndFlag & 0x02) != 0) {
     scale = WritableUtils.readVInt(input);
   }
   if ((typeAndFlag & 0x04) != 0) {
     maxLength = WritableUtils.readVInt(input);
   }
   type = PDataType.values()[typeAndFlag >>> 3];
   sortOrder = SortOrder.fromSystemValue(WritableUtils.readVInt(input));
 }