public void readFields(DataInput in) throws IOException {
in.readFully(internalBytes, 0, 4);
if (TimestampWritable.hasDecimalOrSecondVInt(internalBytes[0])) {
in.readFully(internalBytes, 4, 1);
int len = (byte) WritableUtils.decodeVIntSize(internalBytes[4]);
if (len > 1) {
in.readFully(internalBytes, 5, len - 1);
}
long vlong = LazyBinaryUtils.readVLongFromByteArray(internalBytes, 4);
if (vlong < -1000000000 || vlong > 999999999) {
throw new IOException(
"Invalid first vint value (encoded nanoseconds) of a TimestampWritable: "
+ vlong
+ ", expected to be between -1000000000 and 999999999.");
// Note that -1000000000 is a valid value corresponding to a nanosecond timestamp
// of 999999999, because if the second VInt is present, we use the value
// (-reversedNanoseconds - 1) as the second VInt.
}
if (vlong < 0) {
// This indicates there is a second VInt containing the additional bits of the seconds
// field.
in.readFully(internalBytes, 4 + len, 1);
int secondVIntLen = (byte) WritableUtils.decodeVIntSize(internalBytes[4 + len]);
if (secondVIntLen > 1) {
in.readFully(internalBytes, 5 + len, secondVIntLen - 1);
}
}
}
currentBytes = internalBytes;
this.offset = 0;
}
@Override
public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
try {
int firstL1 = WritableUtils.decodeVIntSize(b1[s1]) + readVInt(b1, s1);
int firstL2 = WritableUtils.decodeVIntSize(b2[s2]) + readVInt(b2, s2);
return TEXT_COMPARATOR.compare(b1, s1, firstL1, b2, s2, firstL2);
} catch (IOException e) {
throw new IllegalArgumentException(e);
}
}
public static int getTotalLength(byte[] bytes, int offset) {
int len = 4;
if (hasDecimalOrSecondVInt(bytes[offset])) {
int firstVIntLen = WritableUtils.decodeVIntSize(bytes[offset + 4]);
len += firstVIntLen;
if (hasSecondVInt(bytes[offset + 4])) {
len += WritableUtils.decodeVIntSize(bytes[offset + 4 + firstVIntLen]);
}
}
return len;
}
/** Optimization hook. */
public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
long thisLeftValue = readLong(b1, s1);
long thatLeftValue = readLong(b2, s2);
if (thisLeftValue == thatLeftValue) {
int n1 = WritableUtils.decodeVIntSize(b1[s1 + 8]);
int n2 = WritableUtils.decodeVIntSize(b2[s2 + 8]);
return compareBytes(b1, s1 + 8 + n1, l1 - n1 - 8, b2, s2 + n2 + 8, l2 - n2 - 8);
}
return thisLeftValue < thatLeftValue ? -1 : 1;
}
public static final int compare(byte[] x, int xs, int xl, byte[] y, int ys, int yl, int[] size) {
try {
size[0] = 1 + WritableUtils.decodeVIntSize(x[xs]);
long v = WritableComparator.readVLong(x, xs) - WritableComparator.readVLong(y, ys);
return (v == 0) ? 0 : ((v > 0) ? 1 : -1);
} catch (IOException e) {
throw new Error(e);
}
}
@Override
public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
try {
int result = 0;
int pos1 = WritableUtils.decodeVIntSize(b1[s1]);
int pos2 = WritableUtils.decodeVIntSize(b2[s2]);
int split1 = WritableComparator.readVInt(b1, s1);
int split2 = WritableComparator.readVInt(b2, s2);
result = split2 == split1 ? 0 : (split2 < split1 ? 1 : -1);
if (result != 0) {
return result;
}
long offset1 = WritableComparator.readVLong(b1, s1 + pos1);
long offset2 = WritableComparator.readVLong(b2, s2 + pos2);
result = offset2 == offset1 ? 0 : (offset2 < offset1 ? 1 : -1);
return result;
} catch (Exception ex) {
throw new IllegalArgumentException(ex);
}
}
public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
try {
int h1 = WritableUtils.decodeVIntSize(b1[s1 + 1]) + 1;
int h2 = WritableUtils.decodeVIntSize(b2[s2 + 1]) + 1;
int cmp = SOURCE_COMP.compare(b1, s1 + h1, l1 - h1, b2, s2 + h2, l2 - h2);
if (cmp != 0) return cmp;
cmp = TARGET_COMP.compare(b1, s1 + h1, l1 - h1, b2, s2 + h2, l2 - h2);
if (cmp != 0) return cmp;
cmp = PrimitiveUtils.compare(b1[s1], b2[s2]);
if (cmp != 0) return cmp;
int lhs1 = Math.abs(WritableComparator.readVInt(b1, s1 + 1));
int lhs2 = Math.abs(WritableComparator.readVInt(b2, s2 + 1));
return PrimitiveUtils.compare(lhs1, lhs2);
} catch (IOException e) {
throw new IllegalArgumentException(e);
}
}
/** Similar to {@link WritableUtils#readVLong(DataInput)} but reads from a {@link ByteBuff}. */
public static long readVLong(ByteBuff in) {
byte firstByte = in.get();
int len = WritableUtils.decodeVIntSize(firstByte);
if (len == 1) {
return firstByte;
}
long i = 0;
for (int idx = 0; idx < len - 1; idx++) {
byte b = in.get();
i = i << 8;
i = i | (b & 0xFF);
}
return (WritableUtils.isNegativeVInt(firstByte) ? (i ^ -1L) : i);
}
/**
* Read a zero-compressed encoded long from a byte array.
*
* @param bytes the byte array
* @param offset the offset in the byte array where the VLong is stored
* @return the long
*/
public static long readVLongFromByteArray(final byte[] bytes, int offset) {
byte firstByte = bytes[offset++];
int len = WritableUtils.decodeVIntSize(firstByte);
if (len == 1) {
return firstByte;
}
long i = 0;
for (int idx = 0; idx < len - 1; idx++) {
byte b = bytes[offset++];
i = i << 8;
i = i | (b & 0xFF);
}
return (WritableUtils.isNegativeVInt(firstByte) ? ~i : i);
}
/**
* Reads a zero-compressed encoded int from a byte array and returns it.
*
* @param bytes the byte array
* @param offset offset of the array to read from
* @param vInt storing the deserialized int and its size in byte
*/
public static void readVInt(byte[] bytes, int offset, VInt vInt) {
byte firstByte = bytes[offset];
vInt.length = (byte) WritableUtils.decodeVIntSize(firstByte);
if (vInt.length == 1) {
vInt.value = firstByte;
return;
}
int i = 0;
for (int idx = 0; idx < vInt.length - 1; idx++) {
byte b = bytes[offset + 1 + idx];
i = i << 8;
i = i | (b & 0xFF);
}
vInt.value = (WritableUtils.isNegativeVInt(firstByte) ? (i ^ -1) : i);
}
/**
* Gets seconds stored as integer at bytes[offset]
*
* @param bytes
* @param offset
* @return the number of seconds
*/
public static long getSeconds(byte[] bytes, int offset) {
int lowest31BitsOfSecondsAndFlag = bytesToInt(bytes, offset);
if (lowest31BitsOfSecondsAndFlag >= 0
|| // the "has decimal or second VInt" flag is not set
!hasSecondVInt(bytes[offset + 4])) {
// The entire seconds field is stored in the first 4 bytes.
return lowest31BitsOfSecondsAndFlag & LOWEST_31_BITS_OF_SEC_MASK;
}
// We compose the seconds field from two parts. The lowest 31 bits come from the first four
// bytes. The higher-order bits come from the second VInt that follows the nanos field.
return ((long) (lowest31BitsOfSecondsAndFlag & LOWEST_31_BITS_OF_SEC_MASK))
| (LazyBinaryUtils.readVLongFromByteArray(
bytes, offset + 4 + WritableUtils.decodeVIntSize(bytes[offset + 4]))
<< 31);
}
public static void setTimestamp(Timestamp t, byte[] bytes, int offset) {
boolean hasDecimalOrSecondVInt = hasDecimalOrSecondVInt(bytes[offset]);
long seconds = (long) TimestampWritable.getSeconds(bytes, offset);
int nanos = 0;
if (hasDecimalOrSecondVInt) {
nanos = TimestampWritable.getNanos(bytes, offset + 4);
if (hasSecondVInt(bytes[offset + 4])) {
seconds +=
LazyBinaryUtils.readVLongFromByteArray(
bytes, offset + 4 + WritableUtils.decodeVIntSize(bytes[offset + 4]));
}
}
t.setTime(seconds * 1000);
if (nanos != 0) {
t.setNanos(nanos);
}
}
/**
* Writes a Timestamp's serialized value to byte array b at the given offset
*
* @param timestamp to convert to bytes
* @param b destination byte array
* @param offset destination offset in the byte array
*/
public static void convertTimestampToBytes(Timestamp t, byte[] b, int offset) {
long millis = t.getTime();
int nanos = t.getNanos();
long seconds = millisToSeconds(millis);
boolean hasSecondVInt = seconds < 0 || seconds > Integer.MAX_VALUE;
boolean hasDecimal = setNanosBytes(nanos, b, offset + 4, hasSecondVInt);
int firstInt = (int) seconds;
if (hasDecimal || hasSecondVInt) {
firstInt |= DECIMAL_OR_SECOND_VINT_FLAG;
} else {
firstInt &= LOWEST_31_BITS_OF_SEC_MASK;
}
intToBytes(firstInt, b, offset);
if (hasSecondVInt) {
LazyBinaryUtils.writeVLongToByteArray(
b, offset + 4 + WritableUtils.decodeVIntSize(b[offset + 4]), seconds >> 31);
}
}
/**
* Given a byte[] that has binary sortable data, initialize the internal structures to hold that
* data
*
* @param bytes the byte array that holds the binary sortable representation
* @param binSortOffset offset of the binary-sortable representation within the buffer.
*/
public void setBinarySortable(byte[] bytes, int binSortOffset) {
// Flip the sign bit (and unused bits of the high-order byte) of the seven-byte long back.
long seconds = readSevenByteLong(bytes, binSortOffset) ^ SEVEN_BYTE_LONG_SIGN_FLIP;
int nanos = bytesToInt(bytes, binSortOffset + 7);
int firstInt = (int) seconds;
boolean hasSecondVInt = seconds < 0 || seconds > Integer.MAX_VALUE;
if (nanos != 0 || hasSecondVInt) {
firstInt |= DECIMAL_OR_SECOND_VINT_FLAG;
} else {
firstInt &= LOWEST_31_BITS_OF_SEC_MASK;
}
intToBytes(firstInt, internalBytes, 0);
setNanosBytes(nanos, internalBytes, 4, hasSecondVInt);
if (hasSecondVInt) {
LazyBinaryUtils.writeVLongToByteArray(
internalBytes, 4 + WritableUtils.decodeVIntSize(internalBytes[4]), seconds >> 31);
}
currentBytes = internalBytes;
this.offset = 0;
}
public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
int n1 = WritableUtils.decodeVIntSize(b1[s1]);
int n2 = WritableUtils.decodeVIntSize(b2[s2]);
return -1 * WritableComparator.compareBytes(b1, s1 + n1, l1 - n1, b2, s2 + n2, l2 - n2);
}
/**
* Check a particular field and set its size and offset in bytes based on the field type and the
* bytes arrays.
*
* <p>For void, boolean, byte, short, int, long, float and double, there is no offset and the size
* is fixed. For string, map, list, struct, the first four bytes are used to store the size. So
* the offset is 4 and the size is computed by concating the first four bytes together. The first
* four bytes are defined with respect to the offset in the bytes arrays. For timestamp, if the
* first bit is 0, the record length is 4, otherwise a VInt begins at the 5th byte and its length
* is added to 4.
*
* @param objectInspector object inspector of the field
* @param bytes bytes arrays store the table row
* @param offset offset of this field
* @param recordInfo modify this byteinfo object and return it
*/
public static void checkObjectByteInfo(
ObjectInspector objectInspector, byte[] bytes, int offset, RecordInfo recordInfo, VInt vInt) {
Category category = objectInspector.getCategory();
switch (category) {
case PRIMITIVE:
PrimitiveCategory primitiveCategory =
((PrimitiveObjectInspector) objectInspector).getPrimitiveCategory();
switch (primitiveCategory) {
case VOID:
recordInfo.elementOffset = 0;
recordInfo.elementSize = 0;
break;
case BOOLEAN:
case BYTE:
recordInfo.elementOffset = 0;
recordInfo.elementSize = 1;
break;
case SHORT:
recordInfo.elementOffset = 0;
recordInfo.elementSize = 2;
break;
case FLOAT:
recordInfo.elementOffset = 0;
recordInfo.elementSize = 4;
break;
case DOUBLE:
recordInfo.elementOffset = 0;
recordInfo.elementSize = 8;
break;
case INT:
recordInfo.elementOffset = 0;
recordInfo.elementSize = WritableUtils.decodeVIntSize(bytes[offset]);
break;
case LONG:
recordInfo.elementOffset = 0;
recordInfo.elementSize = WritableUtils.decodeVIntSize(bytes[offset]);
break;
case STRING:
// using vint instead of 4 bytes
LazyBinaryUtils.readVInt(bytes, offset, vInt);
recordInfo.elementOffset = vInt.length;
recordInfo.elementSize = vInt.value;
break;
case CHAR:
case VARCHAR:
LazyBinaryUtils.readVInt(bytes, offset, vInt);
recordInfo.elementOffset = vInt.length;
recordInfo.elementSize = vInt.value;
break;
case BINARY:
// using vint instead of 4 bytes
LazyBinaryUtils.readVInt(bytes, offset, vInt);
recordInfo.elementOffset = vInt.length;
recordInfo.elementSize = vInt.value;
break;
case DATE:
recordInfo.elementOffset = 0;
recordInfo.elementSize = WritableUtils.decodeVIntSize(bytes[offset]);
break;
case TIMESTAMP:
recordInfo.elementOffset = 0;
recordInfo.elementSize = TimestampWritable.getTotalLength(bytes, offset);
break;
case DECIMAL:
// using vint instead of 4 bytes
LazyBinaryUtils.readVInt(bytes, offset, vInt);
recordInfo.elementOffset = 0;
recordInfo.elementSize = vInt.length;
LazyBinaryUtils.readVInt(bytes, offset + vInt.length, vInt);
recordInfo.elementSize += vInt.length + vInt.value;
break;
default:
{
throw new RuntimeException("Unrecognized primitive type: " + primitiveCategory);
}
}
break;
case LIST:
case MAP:
case STRUCT:
case UNION:
recordInfo.elementOffset = 4;
recordInfo.elementSize = LazyBinaryUtils.byteArrayToInt(bytes, offset);
break;
default:
{
throw new RuntimeException("Unrecognized non-primitive type: " + category);
}
}
}
