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com.aerospike.client.command.Buffer Maven / Gradle / Ivy
Aerospike Java client interface to Aerospike database server
/*
* Copyright 2012-2020 Aerospike, Inc.
*
* Portions may be licensed to Aerospike, Inc. under one or more contributor
* license agreements WHICH ARE COMPATIBLE WITH THE APACHE LICENSE, VERSION 2.0.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.aerospike.client.command;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.util.Arrays;
import com.aerospike.client.AerospikeException;
import com.aerospike.client.ResultCode;
import com.aerospike.client.Value;
import com.aerospike.client.util.Unpacker;
public final class Buffer {
public static Value bytesToKeyValue(int type, byte[] buf, int offset, int len)
throws AerospikeException {
switch (type) {
case ParticleType.STRING:
return Value.get(Buffer.utf8ToString(buf, offset, len));
case ParticleType.INTEGER:
return bytesToLongValue(buf, offset, len);
case ParticleType.DOUBLE:
return new Value.DoubleValue(Buffer.bytesToDouble(buf, offset));
case ParticleType.BLOB:
return Value.get(Arrays.copyOfRange(buf, offset, offset+len));
default:
return null;
}
}
public static Object bytesToParticle(int type, byte[] buf, int offset, int len)
throws AerospikeException {
switch (type) {
case ParticleType.STRING:
return Buffer.utf8ToString(buf, offset, len);
case ParticleType.INTEGER:
return Buffer.bytesToNumber(buf, offset, len);
case ParticleType.DOUBLE:
return Buffer.bytesToDouble(buf, offset);
case ParticleType.BLOB:
return Arrays.copyOfRange(buf, offset, offset+len);
case ParticleType.JBLOB:
// Java deserialization is no longer allowed, so return java serialized blob as a byte[].
// The user can deserialize the byte[] from the record bin using the following code:
//
// try (ByteArrayInputStream bastream = new ByteArrayInputStream(bytes, 0, len)) {
// try (ObjectInputStream oistream = new ObjectInputStream(bastream)) {
// return oistream.readObject();
// }
// }
return Arrays.copyOfRange(buf, offset, offset+len);
case ParticleType.GEOJSON:
return Buffer.bytesToGeoJSON(buf, offset, len);
case ParticleType.HLL:
return Buffer.bytesToHLL(buf, offset, len);
case ParticleType.LIST:
return Unpacker.unpackObjectList(buf, offset, len);
case ParticleType.MAP:
return Unpacker.unpackObjectMap(buf, offset, len);
default:
return null;
}
}
/*
private static Object parseList(byte[] buf, int offset, int len) throws AerospikeException {
int limit = offset + len;
int itemCount = Buffer.bytesToInt(buf, offset);
offset += 4;
ArrayList list = new ArrayList(itemCount);
while (offset < limit) {
int sz = Buffer.bytesToInt(buf, offset);
offset += 4;
int type = buf[offset];
offset++;
list.add(bytesToParticle(type, buf, offset, sz));
offset += sz;
}
return list;
}
private static Object parseMap(byte[] buf, int offset, int len) throws AerospikeException {
Object key;
Object value;
int limit = offset + len;
int n_items = Buffer.bytesToInt(buf, offset);
offset += 4;
HashMap map = new HashMap(n_items);
while (offset < limit) {
// read out the key
int sz = Buffer.bytesToInt(buf, offset);
offset += 4;
int type = buf[offset];
offset++;
key = bytesToParticle(type, buf, offset, len);
offset += sz;
// read out the value
sz = Buffer.bytesToInt(buf, offset);
offset += 4;
type = buf[offset];
offset++;
value = bytesToParticle(type, buf, offset, len);
offset += sz;
map.put(key, value);
}
return map;
}
*/
/**
* Estimate size of Utf8 encoded bytes without performing the actual encoding.
*/
public static int estimateSizeUtf8(String value) {
if (value == null) {
return 0;
}
int max = value.length();
int count = 0;
for (int i = 0; i < max; i++) {
char ch = value.charAt(i);
if (ch < 0x80) {
count++;
}
else if (ch < 0x800) {
count += 2;
}
else if (Character.isHighSurrogate(ch)) {
count += 4;
++i;
} else {
count += 3;
}
}
return count;
}
public static byte[] stringToUtf8(String s) {
if (s == null || s.length() == 0) {
return new byte[0];
}
int size = estimateSizeUtf8(s);
byte[] bytes = new byte[size];
stringToUtf8(s, bytes, 0);
return bytes;
}
/**
* Convert input string to UTF-8, copies into buffer (at given offset).
* Returns number of bytes in the string.
*
* Java's internal UTF8 conversion is very, very slow.
* This is, rather amazingly, 8x faster than the to-string method.
* Returns the number of bytes this translated into.
*/
public static int stringToUtf8(String s, byte[] buf, int offset) {
if (s == null) {
return 0;
}
int length = s.length();
int startOffset = offset;
for (int i = 0; i < length; i++) {
int c = s.charAt(i);
if (c < 0x80) {
buf[offset++] = (byte) c;
}
else if (c < 0x800) {
buf[offset++] = (byte)(0xc0 | ((c >> 6)));
buf[offset++] = (byte)(0x80 | (c & 0x3f));
}
else {
// Encountered a different encoding other than 2-byte UTF8. Let java handle it.
try {
byte[] value = s.getBytes("UTF8");
System.arraycopy(value, 0, buf, startOffset, value.length);
return value.length;
}
catch (UnsupportedEncodingException uee) {
throw new RuntimeException("UTF8 encoding is not supported.");
}
}
}
return offset - startOffset;
}
public static String utf8ToString(byte[] buf, int offset, int length) {
// A Thread local implementation does not help here, so
// allocate character buffer each time.
if (length == 0) {
return "";
}
char[] charBuffer = new char[length];
int charCount = 0;
int limit = offset + length;
int origoffset = offset;
while (offset < limit ) {
int b1 = buf[offset];
if (b1 >= 0) {
charBuffer[charCount++] = (char)b1;
offset++;
}
else if ((b1 >> 5) == -2) {
int b2 = buf[offset + 1];
charBuffer[charCount++] = (char) (((b1 << 6) ^ b2) ^ 0x0f80);
offset += 2;
}
else {
// Encountered an UTF encoding which uses more than 2 bytes.
// Use a native function to do the conversion.
try {
return new String(buf, origoffset, length, "UTF8");
}
catch (UnsupportedEncodingException uee) {
throw new RuntimeException("UTF8 decoding is not supported.");
}
}
}
return new String(charBuffer, 0, charCount);
}
public static String utf8ToString(byte[] buf, int offset, int length, StringBuilder sb) {
if (length == 0) {
return "";
}
// This method is designed to accommodate multiple string conversions on the same
// thread, but without the ThreadLocal overhead. The StringBuilder instance is
// created on the stack and passed in each method invocation.
sb.setLength(0);
int limit = offset + length;
int origoffset = offset;
while (offset < limit ) {
if ((buf[offset] & 0x80) == 0) { // 1 byte
char c = (char) buf[offset];
sb.append(c);
offset++;
}
else if ((buf[offset] & 0xE0) == 0xC0) { // 2 bytes
char c = (char) (((buf[offset] & 0x1f) << 6) | (buf[offset+1] & 0x3f));
sb.append(c);
offset += 2;
}
else {
// Encountered an UTF encoding which uses more than 2 bytes.
// Use a native function to do the conversion.
try {
return new String(buf, origoffset, length, "UTF8");
}
catch (UnsupportedEncodingException uee) {
throw new RuntimeException("UTF8 decoding is not supported.");
}
}
}
return sb.toString();
}
/**
* Convert UTF8 numeric digits to an integer. Negative integers are not supported.
*
* Input format: 1234
*/
public static int utf8DigitsToInt(byte[] buf, int begin, int end) {
int val = 0;
int mult = 1;
for (int i = end - 1; i >= begin; i--) {
val += ((int)buf[i] - 48) * mult;
mult *= 10;
}
return val;
}
public static String bytesToHexString(byte[] buf) {
if (buf == null || buf.length == 0) {
return "";
}
StringBuilder sb = new StringBuilder(buf.length * 2);
for (int i = 0; i < buf.length; i++) {
sb.append(String.format("%02x", buf[i]));
}
return sb.toString();
}
public static String bytesToHexString(byte[] buf, int offset, int length) {
StringBuilder sb = new StringBuilder(length * 2);
for (int i = offset; i < length; i++) {
sb.append(String.format("%02x", buf[i]));
}
return sb.toString();
}
public static Object bytesToObject(byte[] buf, int offset, int length)
throws AerospikeException.Serialize {
if (length <= 0) {
return null;
}
throw new AerospikeException(ResultCode.SERIALIZE_ERROR, "Object deserializer has been disabled");
}
public static Value bytesToLongValue(byte[] buf, int offset, int len) {
long val = 0;
for (int i = 0; i < len; i++) {
val <<= 8;
val |= buf[offset+i] & 0xFF;
}
return new Value.LongValue(val);
}
public static Object bytesToGeoJSON(byte[] buf, int offset, int len) {
// Ignore the flags for now
int ncells = bytesToShort(buf, offset + 1);
int hdrsz = 1 + 2 + (ncells * 8);
return Value.getAsGeoJSON(Buffer.utf8ToString(buf, offset + hdrsz, len - hdrsz));
}
public static Object bytesToHLL(byte[] buf, int offset, int len) {
byte[] bytes = Arrays.copyOfRange(buf, offset, offset+len);
return Value.getAsHLL(bytes);
}
public static Object bytesToNumber(byte[] buf, int offset, int len) {
// Server always returns 8 for integer length.
if (len == 8) {
return bytesToLong(buf, offset);
}
// Handle other lengths just in case server changes.
if (len == 0) {
return new Long(0);
}
if (len == 4) {
return new Long(bytesToInt(buf, offset));
}
if (len > 8) {
return bytesToBigInteger(buf, offset, len);
}
// Handle variable length integer.
long val = 0;
for (int i = 0; i < len; i++) {
val <<= 8;
val |= buf[offset+i] & 0xFF;
}
return new Long(val);
}
public static Object bytesToBigInteger(byte[] buf, int offset, int len) {
boolean negative = false;
if ((buf[offset] & 0x80) != 0) {
negative = true;
buf[offset] &= 0x7f;
}
byte[] bytes = new byte[len];
System.arraycopy(buf, offset, bytes, 0, len);
BigInteger big = new BigInteger(bytes);
if (negative) {
big = big.negate();
}
return big;
}
//-------------------------------------------------------
// 64 bit double conversions.
//-------------------------------------------------------
public static double bytesToDouble(byte[] buf, int offset) {
return Double.longBitsToDouble(bytesToLong(buf, offset));
}
public static void doubleToBytes(double v, byte[] buf, int offset) {
Buffer.longToBytes(Double.doubleToLongBits(v), buf, offset);
}
//-------------------------------------------------------
// 64 bit number conversions.
//-------------------------------------------------------
/**
* Convert long to big endian signed or unsigned 64 bits.
* The bit pattern will be the same regardless of sign.
*/
public static void longToBytes(long v, byte[] buf, int offset) {
buf[offset++] = (byte)(v >>> 56);
buf[offset++] = (byte)(v >>> 48);
buf[offset++] = (byte)(v >>> 40);
buf[offset++] = (byte)(v >>> 32);
buf[offset++] = (byte)(v >>> 24);
buf[offset++] = (byte)(v >>> 16);
buf[offset++] = (byte)(v >>> 8);
buf[offset] = (byte)(v >>> 0);
}
/**
* Convert long to little endian signed or unsigned 64 bits.
* The bit pattern will be the same regardless of sign.
*/
public static void longToLittleBytes(long v, byte[] buf, int offset) {
buf[offset++] = (byte)(v >>> 0);
buf[offset++] = (byte)(v >>> 8);
buf[offset++] = (byte)(v >>> 16);
buf[offset++] = (byte)(v >>> 24);
buf[offset++] = (byte)(v >>> 32);
buf[offset++] = (byte)(v >>> 40);
buf[offset++] = (byte)(v >>> 48);
buf[offset] = (byte)(v >>> 56);
}
/**
* Convert big endian signed 64 bits to long.
*/
public static long bytesToLong(byte[] buf, int offset) {
return (
((long)(buf[offset] & 0xFF) << 56) |
((long)(buf[offset+1] & 0xFF) << 48) |
((long)(buf[offset+2] & 0xFF) << 40) |
((long)(buf[offset+3] & 0xFF) << 32) |
((long)(buf[offset+4] & 0xFF) << 24) |
((long)(buf[offset+5] & 0xFF) << 16) |
((long)(buf[offset+6] & 0xFF) << 8) |
((long)(buf[offset+7] & 0xFF) << 0)
);
}
/**
* Convert little endian signed 64 bits to long.
*/
public static long littleBytesToLong(byte[] buf, int offset) {
return (
((long)(buf[offset] & 0xFF) << 0) |
((long)(buf[offset+1] & 0xFF) << 8) |
((long)(buf[offset+2] & 0xFF) << 16) |
((long)(buf[offset+3] & 0xFF) << 24) |
((long)(buf[offset+4] & 0xFF) << 32) |
((long)(buf[offset+5] & 0xFF) << 40) |
((long)(buf[offset+6] & 0xFF) << 48) |
((long)(buf[offset+7] & 0xFF) << 56)
);
}
//-------------------------------------------------------
// 32 bit number conversions.
//-------------------------------------------------------
/**
* Convert int to big endian signed or unsigned 32 bits.
* The bit pattern will be the same regardless of sign.
*/
public static void intToBytes(int v, byte[] buf, int offset) {
buf[offset++] = (byte)(v >>> 24);
buf[offset++] = (byte)(v >>> 16);
buf[offset++] = (byte)(v >>> 8);
buf[offset] = (byte)(v >>> 0);
}
/**
* Convert int to little endian signed or unsigned 32 bits.
* The bit pattern will be the same regardless of sign.
*/
public static void intToLittleBytes(int v, byte[] buf, int offset) {
buf[offset++] = (byte)(v >>> 0);
buf[offset++] = (byte)(v >>> 8);
buf[offset++] = (byte)(v >>> 16);
buf[offset] = (byte)(v >>> 24);
}
/**
* Convert big endian signed 32 bits to int.
*/
public static int bytesToInt(byte[] buf, int offset) {
return (
((buf[offset] & 0xFF) << 24) |
((buf[offset+1] & 0xFF) << 16) |
((buf[offset+2] & 0xFF) << 8) |
((buf[offset+3] & 0xFF) << 0)
);
}
/**
* Convert little endian signed 32 bits to int.
*/
public static int littleBytesToInt(byte[] buf, int offset) {
return (
((buf[offset] & 0xFF) << 0) |
((buf[offset+1] & 0xFF) << 8) |
((buf[offset+2] & 0xFF) << 16) |
((buf[offset+3] & 0xFF) << 24)
);
}
/**
* Convert big endian unsigned 32 bits to long.
*/
public static long bigUnsigned32ToLong(byte[] buf, int offset) {
return (
((long)(buf[offset] & 0xFF) << 24) |
((long)(buf[offset+1] & 0xFF) << 16) |
((long)(buf[offset+2] & 0xFF) << 8) |
((long)(buf[offset+3] & 0xFF) << 0)
);
}
//-------------------------------------------------------
// 16 bit number conversions.
//-------------------------------------------------------
/**
* Convert int to big endian signed or unsigned 16 bits.
* The bit pattern will be the same regardless of sign.
*/
public static void shortToBytes(int v, byte[] buf, int offset) {
buf[offset++] = (byte)(v >>> 8);
buf[offset] = (byte)(v >>> 0);
}
/**
* Convert int to little endian signed or unsigned 16 bits.
* The bit pattern will be the same regardless of sign.
*/
public static void shortToLittleBytes(int v, byte[] buf, int offset) {
buf[offset++] = (byte)(v >>> 0);
buf[offset] = (byte)(v >>> 8);
}
/**
* Convert big endian unsigned 16 bits to int.
*/
public static int bytesToShort(byte[] buf, int offset) {
return (
((buf[offset] & 0xFF) << 8) |
((buf[offset+1] & 0xFF) << 0)
);
}
/**
* Convert little endian unsigned 16 bits to int.
*/
public static int littleBytesToShort(byte[] buf, int offset) {
return (
((buf[offset] & 0xFF) << 0) |
((buf[offset+1] & 0xFF) << 8)
);
}
/**
* Convert big endian signed 16 bits to short.
*/
public static short bigSigned16ToShort(byte[] buf, int offset) {
return (short)(
((buf[offset] & 0xFF) << 8) |
((buf[offset+1] & 0xFF) << 0)
);
}
//-------------------------------------------------------
// Variable byte number conversions.
//-------------------------------------------------------
/**
* Encode an integer in variable 7-bit format.
* The high bit indicates if more bytes are used.
* Return byte size of integer.
*/
public static int intToVarBytes(int v, byte[] buf, int offset) {
int i = offset;
while (i < buf.length && v >= 0x80) {
buf[i++] = (byte)(v | 0x80);
v >>>= 7;
}
if (i < buf.length) {
buf[i++] = (byte)v;
return i - offset;
}
return 0;
}
/**
* Decode an integer in variable 7-bit format.
* The high bit indicates if more bytes are used.
* Return value and byte size in array.
*/
public static int[] varBytesToInt(byte[] buf, int offset) {
int i = offset;
int val = 0;
int shift = 0;
byte b;
do {
b = buf[i++];
val |= (b & 0x7F) << shift;
shift += 7;
} while ((b & 0x80) != 0);
return new int[] {val, i - offset};
}
}
