在Phoenix中字段的类型所保存的byte数组和HBase中用Bytes工具了转换的byte数组可能会对不上，比如Bytes.toBytes(1)的结果和Phoenix中定义为INTEGER类的byte[]就不一样。因为Phoenix中的INTEGER是带符号的，要用无符号的话需要定义UNSIGNED_INT类型，UNSIGENT_INT类型的byte[]值和Bytes.toBytes(1)是一样的，但是UNSIGENT_INT无法存负数。
所以如果直接定义INTEGER类型的话是不能直接简单地用Bytes.toBytes来转换得到的，由于这种情况的存在就不能直接操作HBase然后直接在Phoenix查看，反之亦然。
所一这里定义了一套将byte数组转换为Phoenix可以用的方法，具体准换的代码是从Phoenix的core包中抠出来的。
先定义一个类型枚举类：
/**
* Phoenix中的类型
*/
public enum PhType {
DEFAULT(-1, "DEFAULT"),
UNSIGNED_INT(4, "UNSIGNED_INT"),
UNSIGNED_BIGINT(8, "UNSIGNED_BIGINT"),
UNSIGNED_TINYINT(1, "UNSIGNED_TINYINT"),
UNSIGNED_SMAILLINT(2, "UNSIGNED_SMAILLINT"),
UNSIGNED_FLOAT(4, "UNSIGNED_FLOAT"),
UNSIGNED_DOUBLE(8, "UNSIGNED_DOUBLE"),
INTEGER(4, "INTEGER"),
BIGINT(8, "BIGINT"),
TINYINT(1, "TINYINT"),
SMAILLINT(2, "SMAILLINT"),
FLOAT(4, "FLOAT"),
DOUBLE(8, "DOUBLE"),
DECIMAL(-1, "DECIMAL"),
BOOLEAN(1, "BOOLEAN"),
TIME(8, "TIME"), //对应Phoenix的UNSIGNED_TIME
DATE(8, "DATE"), //对应Phoenix的UNSIGNED_DATE
TIMESTAMP(12, "TIMESTAMP"), //对应Phoenix的UNSIGNED_TIMESTAMP
VARCHAR(-1, "VARCHAR"),
VARBINARY(-1, "VARBINARY");
/**
* -1：长度可变
*/
private int len;
private String type;
PhType(int len, String type) {
this.len = len;
this.type = type;
}
public int getLen() {
return len;
}
public String getType() {
return this.type;
}
public static PhType getType(String type) {
if (type == null) return DEFAULT;
PhType phType;
if (type.equalsIgnoreCase(UNSIGNED_INT.type)) {
phType = UNSIGNED_INT;
} else if (type.equalsIgnoreCase(UNSIGNED_BIGINT.type)) {
phType = UNSIGNED_BIGINT;
} else if (type.equalsIgnoreCase(UNSIGNED_TINYINT.type)) {
phType = UNSIGNED_TINYINT;
} else if (type.equalsIgnoreCase(UNSIGNED_SMAILLINT.type)) {
phType = UNSIGNED_SMAILLINT;
} else if (type.equalsIgnoreCase(UNSIGNED_FLOAT.type)) {
phType = UNSIGNED_FLOAT;
} else if (type.equalsIgnoreCase(UNSIGNED_DOUBLE.type)) {
phType = UNSIGNED_DOUBLE;
} else if (type.equalsIgnoreCase(INTEGER.type)) {
phType = INTEGER;
} else if (type.equalsIgnoreCase(BIGINT.type)) {
phType = BIGINT;
} else if (type.equalsIgnoreCase(TINYINT.type)) {
phType = TINYINT;
} else if (type.equalsIgnoreCase(SMAILLINT.type)) {
phType = SMAILLINT;
} else if (type.equalsIgnoreCase(FLOAT.type)) {
phType = FLOAT;
} else if (type.equalsIgnoreCase(DOUBLE.type)) {
phType = DOUBLE;
} else if (type.equalsIgnoreCase(BOOLEAN.type)) {
phType = BOOLEAN;
} else if (type.equalsIgnoreCase(TIME.type)) {
phType = TIME;
} else if (type.equalsIgnoreCase(DATE.type)) {
phType = DATE;
} else if (type.equalsIgnoreCase(TIMESTAMP.type)) {
phType = TIMESTAMP;
} else if (type.equalsIgnoreCase(VARCHAR.type)) {
phType = VARCHAR;
} else if (type.equalsIgnoreCase(VARBINARY.type)) {
phType = VARBINARY;
} else if (type.equalsIgnoreCase(DECIMAL.type)) {
phType = DECIMAL;
} else {
phType = DEFAULT;
}
return phType;
}
}然后编写对以上枚举中所有类型的转换：
import com.google.common.math.LongMath;
import org.apache.hadoop.hbase.util.Bytes;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.MathContext;
import java.math.RoundingMode;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* 针对Phoenix的类型转换
*/
public class PhTypeUtil {
private static String dateFormatPattern = "yyyy-MM-dd";
private static String timeFormatPattern = "HH:mm:ss";
private static String datetimeFormatPattern = "yyyy-MM-dd HH:mm:ss";
private static String timestampFormatPattern = "yyyy-MM-dd HH:mm:ss.SSS";
public static byte[] toBytes(Object v, PhType phType) {
if (v == null) return null;
byte[] b = null;
if (phType == PhType.INTEGER) {
b = new byte[Bytes.SIZEOF_INT];
encodeInt(((Number) v).intValue(), b, 0);
} else if (phType == PhType.UNSIGNED_INT) {
b = new byte[Bytes.SIZEOF_INT];
encodeUnsignedInt(((Number) v).intValue(), b, 0);
} else if (phType == PhType.BIGINT) {
b = new byte[Bytes.SIZEOF_LONG];
encodeLong(((Number) v).longValue(), b, 0);
} else if (phType == PhType.UNSIGNED_BIGINT) {
b = new byte[Bytes.SIZEOF_LONG];
encodeUnsignedLong(((Number) v).longValue(), b, 0);
} else if (phType == PhType.SMAILLINT) {
b = new byte[Bytes.SIZEOF_SHORT];
encodeShort(((Number) v).shortValue(), b, 0);
} else if (phType == PhType.UNSIGNED_SMAILLINT) {
b = new byte[Bytes.SIZEOF_SHORT];
encodeUnsignedShort(((Number) v).shortValue(), b, 0);
} else if (phType == PhType.TINYINT) {
b = new byte[Bytes.SIZEOF_BYTE];
encodeByte(((Number) v).byteValue(), b, 0);
} else if (phType == PhType.UNSIGNED_TINYINT) {
b = new byte[Bytes.SIZEOF_BYTE];
encodeUnsignedByte(((Number) v).byteValue(), b, 0);
} else if (phType == PhType.FLOAT) {
b = new byte[Bytes.SIZEOF_FLOAT];
encodeFloat(((Number) v).floatValue(), b, 0);
} else if (phType == PhType.UNSIGNED_FLOAT) {
b = new byte[Bytes.SIZEOF_FLOAT];
encodeUnsignedFloat(((Number) v).floatValue(), b, 0);
} else if (phType == PhType.DOUBLE) {
b = new byte[Bytes.SIZEOF_DOUBLE];
encodeDouble(((Number) v).doubleValue(), b, 0);
} else if (phType == PhType.UNSIGNED_DOUBLE) {
b = new byte[Bytes.SIZEOF_DOUBLE];
encodeUnsignedDouble(((Number) v).doubleValue(), b, 0);
} else if (phType == PhType.BOOLEAN) {
if ((Boolean) v) {
b = new byte[]{1};
} else {
b = new byte[]{0};
}
} else if (phType == PhType.TIME || phType == PhType.DATE) {
b = new byte[Bytes.SIZEOF_LONG];
encodeDate(v, b, 0);
} else if (phType == PhType.TIMESTAMP) {
b = new byte[Bytes.SIZEOF_LONG + Bytes.SIZEOF_INT];
encodeTimestamp(v, b, 0);
} else if (phType == PhType.VARBINARY) {
b = (byte[]) v;
} else if (phType == PhType.VARCHAR || phType == PhType.DEFAULT) {
b = Bytes.toBytes(v.toString());
} else if (phType == PhType.DECIMAL) {
b = encodeDecimal(v);
}
return b;
}
public static Object toObject(byte[] b, PhType phType) {
if (b == null) return null;
Object v = null;
if (phType == PhType.INTEGER) {
v = decodeInt(b, 0);
} else if (phType == PhType.UNSIGNED_INT) {
v = decodeUnsignedInt(b, 0);
} else if (phType == PhType.BIGINT) {
v = decodeLong(b, 0);
} else if (phType == PhType.UNSIGNED_BIGINT) {
v = decodeUnsignedLong(b, 0);
} else if (phType == PhType.SMAILLINT) {
v = decodeShort(b, 0);
} else if (phType == PhType.UNSIGNED_SMAILLINT) {
v = decodeUnsignedShort(b, 0);
} else if (phType == PhType.TINYINT) {
v = decodeByte(b, 0);
} else if (phType == PhType.UNSIGNED_TINYINT) {
v = decodeUnsignedByte(b, 0);
} else if (phType == PhType.FLOAT) {
v = decodeFloat(b, 0);
} else if (phType == PhType.UNSIGNED_FLOAT) {
v = decodeUnsignedFloat(b, 0);
} else if (phType == PhType.DOUBLE) {
v = decodeDouble(b, 0);
} else if (phType == PhType.UNSIGNED_DOUBLE) {
v = decodeUnsignedDouble(b, 0);
} else if (phType == PhType.BOOLEAN) {
checkForSufficientLength(b, 0, Bytes.SIZEOF_BOOLEAN);
if (b[0] == 1) {
v = true;
} else if (b[0] == 0) {
v = false;
}
} else if (phType == PhType.TIME || phType == PhType.DATE) {
v = new Date(decodeUnsignedLong(b, 0));
} else if (phType == PhType.TIMESTAMP) {
long millisDeserialized = decodeUnsignedLong(b, 0);
Timestamp ts = new Timestamp(millisDeserialized);
int nanosDeserialized = decodeUnsignedInt(b, Bytes.SIZEOF_LONG);
ts.setNanos(nanosDeserialized < 1000000 ? ts.getNanos() + nanosDeserialized : nanosDeserialized);
v = ts;
} else if (phType == PhType.VARBINARY) {
v = b;
} else if (phType == PhType.VARCHAR || phType == PhType.DEFAULT) {
v = Bytes.toString(b);
} else if (phType == PhType.DECIMAL) {
v = decodeDecimal(b, 0, b.length);
}
return v;
}
public static int decodeInt(byte[] bytes, int o) {
checkForSufficientLength(bytes, o, Bytes.SIZEOF_INT);
int v;
v = bytes[o] ^ 0x80; // Flip sign bit back
for (int i = 1; i < Bytes.SIZEOF_INT; i++) {
v = (v << 8) + (bytes[o + i] & 0xff);
}
return v;
}
public static int encodeInt(int v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_INT);
b[o + 0] = (byte) ((v >> 24) ^ 0x80); // Flip sign bit so that INTEGER is binary comparable
b[o + 1] = (byte) (v >> 16);
b[o + 2] = (byte) (v >> 8);
b[o + 3] = (byte) v;
return Bytes.SIZEOF_INT;
}
public static int decodeUnsignedInt(byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_INT);
int v = Bytes.toInt(b, o);
if (v < 0) {
throw new RuntimeException();
}
return v;
}
public static int encodeUnsignedInt(int v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_INT);
if (v < 0) {
throw new RuntimeException();
}
Bytes.putInt(b, o, v);
return Bytes.SIZEOF_INT;
}
public static long decodeLong(byte[] bytes, int o) {
checkForSufficientLength(bytes, o, Bytes.SIZEOF_LONG);
long v;
byte b = bytes[o];
v = b ^ 0x80; // Flip sign bit back
for (int i = 1; i < Bytes.SIZEOF_LONG; i++) {
b = bytes[o + i];
v = (v << 8) + (b & 0xff);
}
return v;
}
public static int encodeLong(long v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_LONG);
b[o + 0] = (byte) ((v >> 56) ^ 0x80); // Flip sign bit so that INTEGER is binary comparable
b[o + 1] = (byte) (v >> 48);
b[o + 2] = (byte) (v >> 40);
b[o + 3] = (byte) (v >> 32);
b[o + 4] = (byte) (v >> 24);
b[o + 5] = (byte) (v >> 16);
b[o + 6] = (byte) (v >> 8);
b[o + 7] = (byte) v;
return Bytes.SIZEOF_LONG;
}
public static long decodeUnsignedLong(byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_LONG);
long v = 0;
for (int i = o; i < o + Bytes.SIZEOF_LONG; i++) {
v <<= 8;
v ^= b[i] & 0xFF;
}
if (v < 0) {
throw new RuntimeException();
}
return v;
}
public static int encodeUnsignedLong(long v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_LONG);
if (v < 0) {
throw new RuntimeException();
}
Bytes.putLong(b, o, v);
return Bytes.SIZEOF_LONG;
}
public static short decodeShort(byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_SHORT);
int v;
v = b[o] ^ 0x80; // Flip sign bit back
for (int i = 1; i < Bytes.SIZEOF_SHORT; i++) {
v = (v << 8) + (b[o + i] & 0xff);
}
return (short) v;
}
public static int encodeShort(short v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_SHORT);
b[o + 0] = (byte) ((v >> 8) ^ 0x80); // Flip sign bit so that Short is binary comparable
b[o + 1] = (byte) v;
return Bytes.SIZEOF_SHORT;
}
public static short decodeUnsignedShort(byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_SHORT);
short v = Bytes.toShort(b, o);
if (v < 0) {
throw new RuntimeException();
}
return v;
}
public static int encodeUnsignedShort(short v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_SHORT);
if (v < 0) {
throw new RuntimeException();
}
Bytes.putShort(b, o, v);
return Bytes.SIZEOF_SHORT;
}
public static byte decodeByte(byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_BYTE);
int v;
v = b[o] ^ 0x80; // Flip sign bit back
return (byte) v;
}
public static int encodeByte(byte v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_BYTE);
b[o] = (byte) (v ^ 0x80); // Flip sign bit so that Short is binary comparable
return Bytes.SIZEOF_BYTE;
}
public static byte decodeUnsignedByte(byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_BYTE);
byte v = b[o];
if (v < 0) {
throw new RuntimeException();
}
return v;
}
public static int encodeUnsignedByte(byte v, byte[] b, int o) {
if (v < 0) {
throw new RuntimeException();
}
Bytes.putByte(b, o, v);
return Bytes.SIZEOF_BYTE;
}
public static float decodeFloat(byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_INT);
int value;
value = Bytes.toInt(b, o);
value--;
value ^= (~value >> Integer.SIZE - 1) | Integer.MIN_VALUE;
return Float.intBitsToFloat(value);
}
public static int encodeFloat(float v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_FLOAT);
int i = Float.floatToIntBits(v);
i = (i ^ ((i >> Integer.SIZE - 1) | Integer.MIN_VALUE)) + 1;
Bytes.putInt(b, o, i);
return Bytes.SIZEOF_FLOAT;
}
public static float decodeUnsignedFloat(byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_FLOAT);
float v = Bytes.toFloat(b, o);
if (v < 0) {
throw new RuntimeException();
}
return v;
}
public static int encodeUnsignedFloat(float v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_FLOAT);
if (v < 0) {
throw new RuntimeException();
}
Bytes.putFloat(b, o, v);
return Bytes.SIZEOF_FLOAT;
}
public static double decodeDouble(byte[] bytes, int o) {
checkForSufficientLength(bytes, o, Bytes.SIZEOF_LONG);
long l;
l = Bytes.toLong(bytes, o);
l--;
l ^= (~l >> Long.SIZE - 1) | Long.MIN_VALUE;
return Double.longBitsToDouble(l);
}
public static int encodeDouble(double v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_LONG);
long l = Double.doubleToLongBits(v);
l = (l ^ ((l >> Long.SIZE - 1) | Long.MIN_VALUE)) + 1;
Bytes.putLong(b, o, l);
return Bytes.SIZEOF_LONG;
}
public static double decodeUnsignedDouble(byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_DOUBLE);
double v = Bytes.toDouble(b, o);
if (v < 0) {
throw new RuntimeException();
}
return v;
}
public static int encodeUnsignedDouble(double v, byte[] b, int o) {
checkForSufficientLength(b, o, Bytes.SIZEOF_DOUBLE);
if (v < 0) {
throw new RuntimeException();
}
Bytes.putDouble(b, o, v);
return Bytes.SIZEOF_DOUBLE;
}
public static int encodeDate(Object v, byte[] b, int o) {
if (v instanceof Date) {
encodeUnsignedLong(((Date) v).getTime(), b, 0);
} else if (v instanceof String) {
String dateStr = (String) v;
int len = dateStr.length();
Date date = null;
try {
if (len == 10 && dateStr.charAt(4) == '-' && dateStr.charAt(7) == '-') {
SimpleDateFormat format = new SimpleDateFormat(dateFormatPattern);
date = format.parse(dateStr);
} else if (len == 8 && dateStr.charAt(2) == ':' && dateStr.charAt(5) == ':') {
SimpleDateFormat format = new SimpleDateFormat(timeFormatPattern);
date = format.parse(dateStr);
} else if (len == 19 && dateStr.charAt(4) == '-' && dateStr.charAt(7) == '-'
&& dateStr.charAt(13) == ':' && dateStr.charAt(16) == ':') {
SimpleDateFormat format = new SimpleDateFormat(datetimeFormatPattern);
date = format.parse(dateStr);
} else if (len == 23 && dateStr.charAt(4) == '-' && dateStr.charAt(7) == '-'
&& dateStr.charAt(13) == ':' && dateStr.charAt(16) == ':'
&& dateStr.charAt(19) == '.') {
SimpleDateFormat format = new SimpleDateFormat(timestampFormatPattern);
date = format.parse(dateStr);
}
if (date != null) {
encodeUnsignedLong(date.getTime(), b, 0);
}
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
return Bytes.SIZEOF_LONG;
}
public static int encodeTimestamp(Object v, byte[] b, int o) {
if (v instanceof Timestamp) {
Timestamp ts = (Timestamp) v;
encodeUnsignedLong(ts.getTime(), b, o);
Bytes.putInt(b, Bytes.SIZEOF_LONG, ts.getNanos() % 1000000);
} else {
encodeDate(v, b, o);
}
return Bytes.SIZEOF_LONG + Bytes.SIZEOF_INT;
}
public static byte[] encodeDecimal(Object object) {
if (object == null) {
return new byte[0];
}
BigDecimal v = (BigDecimal) object;
v = v.round(DEFAULT_MATH_CONTEXT).stripTrailingZeros();
int len = getLength(v);
byte[] result = new byte[Math.min(len, 21)];
decimalToBytes(v, result, 0, len);
return result;
}
public static BigDecimal decodeDecimal(byte[] bytes, int offset, int length) {
if (length == 1 && bytes[offset] == ZERO_BYTE) {
return BigDecimal.ZERO;
}
int signum = ((bytes[offset] & 0x80) == 0) ? -1 : 1;
int scale;
int index;
int digitOffset;
long multiplier = 100L;
int begIndex = offset + 1;
if (signum == 1) {
scale = (byte) (((bytes[offset] & 0x7F) - 65) * -2);
index = offset + length;
digitOffset = POS_DIGIT_OFFSET;
} else {
scale = (byte) ((~bytes[offset] - 65 - 128) * -2);
index = offset + length - (bytes[offset + length - 1] == NEG_TERMINAL_BYTE ? 1 : 0);
digitOffset = -NEG_DIGIT_OFFSET;
}
length = index - offset;
long l = signum * bytes[--index] - digitOffset;
if (l % 10 == 0) { // trailing zero
scale--; // drop trailing zero and compensate in the scale
l /= 10;
multiplier = 10;
}
// Use long arithmetic for as long as we can
while (index > begIndex) {
if (l >= MAX_LONG_FOR_DESERIALIZE || multiplier >= Long.MAX_VALUE / 100) {
multiplier = LongMath.divide(multiplier, 100L, RoundingMode.UNNECESSARY);
break; // Exit loop early so we don't overflow our multiplier
}
int digit100 = signum * bytes[--index] - digitOffset;
l += digit100 * multiplier;
multiplier = LongMath.checkedMultiply(multiplier, 100);
}
BigInteger bi;
// If still more digits, switch to BigInteger arithmetic
if (index > begIndex) {
bi = BigInteger.valueOf(l);
BigInteger biMultiplier = BigInteger.valueOf(multiplier).multiply(ONE_HUNDRED);
do {
int digit100 = signum * bytes[--index] - digitOffset;
bi = bi.add(biMultiplier.multiply(BigInteger.valueOf(digit100)));
biMultiplier = biMultiplier.multiply(ONE_HUNDRED);
} while (index > begIndex);
if (signum == -1) {
bi = bi.negate();
}
} else {
bi = BigInteger.valueOf(l * signum);
}
// Update the scale based on the precision
scale += (length - 2) * 2;
BigDecimal v = new BigDecimal(bi, scale);
return v;
}
private static int getLength(BigDecimal v) {
int signum = v.signum();
if (signum == 0) { // Special case for zero
return 1;
}
return (signum < 0 ? 2 : 1) + (v.precision() + 1 + (v.scale() % 2 == 0 ? 0 : 1)) / 2;
}
private static final int MAX_PRECISION = 38;
private static final MathContext DEFAULT_MATH_CONTEXT = new MathContext(MAX_PRECISION, RoundingMode.HALF_UP);
private static final Integer MAX_BIG_DECIMAL_BYTES = 21;
private static final byte ZERO_BYTE = (byte) 0x80;
private static final byte NEG_TERMINAL_BYTE = (byte) 102;
private static final int EXP_BYTE_OFFSET = 65;
private static final int POS_DIGIT_OFFSET = 1;
private static final int NEG_DIGIT_OFFSET = 101;
private static final BigInteger MAX_LONG = BigInteger.valueOf(Long.MAX_VALUE);
private static final BigInteger MIN_LONG = BigInteger.valueOf(Long.MIN_VALUE);
private static final BigInteger ONE_HUNDRED = BigInteger.valueOf(100);
private static final long MAX_LONG_FOR_DESERIALIZE = Long.MAX_VALUE / 1000;
private static int decimalToBytes(BigDecimal v, byte[] result, final int offset, int length) {
int signum = v.signum();
if (signum == 0) {
result[offset] = ZERO_BYTE;
return 1;
}
int index = offset + length;
int scale = v.scale();
int expOffset = scale % 2 * (scale < 0 ? -1 : 1);
int multiplyBy;
BigInteger divideBy;
if (expOffset == 0) {
multiplyBy = 1;
divideBy = ONE_HUNDRED;
} else {
multiplyBy = 10;
divideBy = BigInteger.TEN;
}
// Normalize the scale based on what is necessary to end up with a base 100 decimal (i.e. 10.123e3)
int digitOffset;
BigInteger compareAgainst;
if (signum == 1) {
digitOffset = POS_DIGIT_OFFSET;
compareAgainst = MAX_LONG;
scale -= (length - 2) * 2;
result[offset] = (byte) ((-(scale + expOffset) / 2 + EXP_BYTE_OFFSET) | 0x80);
} else {
digitOffset = NEG_DIGIT_OFFSET;
compareAgainst = MIN_LONG;
// Scale adjustment shouldn't include terminal byte in length
scale -= (length - 2 - 1) * 2;
result[offset] = (byte) (~(-(scale + expOffset) / 2 + EXP_BYTE_OFFSET + 128) & 0x7F);
if (length <= MAX_BIG_DECIMAL_BYTES) {
result[--index] = NEG_TERMINAL_BYTE;
} else {
// Adjust length and offset down because we don't have enough room
length = MAX_BIG_DECIMAL_BYTES;
index = offset + length;
}
}
BigInteger bi = v.unscaledValue();
// Use BigDecimal arithmetic until we can fit into a long
while (bi.compareTo(compareAgainst) * signum > 0) {
BigInteger[] dandr = bi.divideAndRemainder(divideBy);
bi = dandr[0];
int digit = dandr[1].intValue();
result[--index] = (byte) (digit * multiplyBy + digitOffset);
multiplyBy = 1;
divideBy = ONE_HUNDRED;
}
long l = bi.longValue();
do {
long divBy = 100 / multiplyBy;
long digit = l % divBy;
l /= divBy;
result[--index] = (byte) (digit * multiplyBy + digitOffset);
multiplyBy = 1;
} while (l != 0);
return length;
}
private static void checkForSufficientLength(byte[] b, int offset, int requiredLength) {
if (b.length < offset + requiredLength) {
throw new RuntimeException
("Expected length of at least " + requiredLength + " bytes, but had " + (b.length - offset));
}
}
}其中调用public static byte[] toBytes(Object v, PhType phType) 和
public static Object toObject(byte[] b, PhType phType)两个方法就可以实现java类型到Phoenix类型的换转。
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