@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));
}