UUID.java
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/*
* Decompiled with CFR 0_118.
*/
package com.day.util;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.net.InetAddress;
import java.security.MessageDigest;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Random;
public class UUID
implements Serializable {
private final byte[] bytes;
private int hashCode;
private final int version;
public static final char[] hexDigits = "0123456789abcdef".toCharArray();
private static byte[] internetAddress = null;
private static File uuidFile = null;
private static final int UUIDsPerTick = 128;
private static long lastTime = new Date().getTime();
private static final long gregorianOffset = - new GregorianCalendar(1582, 9, 15).getTime().getTime();
private static int uuidsThisTick = 128;
private static short prevClock = 0;
private static long prevTime = 0;
private static byte[] prevNode = null;
private static long nextSave = new Date().getTime();
private static Random randomGenerator = new Random(new Date().getTime());
public UUID(String string) {
if (string.length() > 36) {
string = string.substring(0, 36);
}
this.bytes = new byte[16];
int j = 0;
for (int i = 0; i < 36; i += 2) {
this.bytes[j++] = (byte)Integer.parseInt(string.substring(i, i + 2), 16);
if (i != 6 && i != 11 && i != 16 && i != 21) continue;
++i;
}
this.version = this.bytes[7] >> 4 & 15;
}
public UUID(byte[] bytes) {
this.bytes = new byte[16];
System.arraycopy(bytes, 0, this.bytes, 0, Math.min(16, bytes.length));
this.version = bytes[7] >> 4 & 15;
}
public UUID(long[] longs) {
int i;
long hi = longs[0];
long lo = longs[1];
this.bytes = new byte[16];
for (i = 7; i >= 0; --i) {
this.bytes[i] = (byte)(hi & 255);
hi >>= 8;
}
for (i = 7; i >= 0; --i) {
this.bytes[8 + i] = (byte)(lo & 255);
lo >>= 8;
}
this.version = this.bytes[7] >> 4 & 15;
}
public UUID(String name, String namespace) {
this.version = 3;
try {
MessageDigest md5 = MessageDigest.getInstance("MD5");
md5.update(namespace.getBytes());
md5.update(name.getBytes());
this.bytes = md5.digest();
this.bytes[7] = (byte)(this.bytes[7] & 15 | (byte)(this.version << 4));
this.bytes[8] = (byte)(this.bytes[8] & 63 | 128);
return;
}
catch (Exception exc) {
throw new InternalError("MD5 not available");
}
}
public UUID() {
this.version = 4;
try {
ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
DataOutputStream out = new DataOutputStream(byteOut);
out.writeLong(System.currentTimeMillis());
out.writeInt(Thread.currentThread().hashCode());
out.write(internetAddress);
out.writeInt(UUID.random());
out.flush();
MessageDigest md5 = MessageDigest.getInstance("MD5");
md5.update(byteOut.toByteArray());
this.bytes = md5.digest();
this.bytes[7] = (byte)(this.bytes[7] & 15 | (byte)(this.version << 4));
this.bytes[8] = (byte)(this.bytes[8] & 63 | 128);
return;
}
catch (Exception exc) {
throw new InternalError("MD5 not available");
}
}
public UUID(byte[] node, long time, short clock) {
int i;
this.version = 1;
this.bytes = new byte[16];
long t = time;
for (i = 0; i < 8; ++i) {
this.bytes[i] = (byte)(t & 255);
t >>= 8;
}
byte[] arrby = this.bytes;
arrby[7] = (byte)(arrby[7] | (byte)(this.version << 4));
this.bytes[8] = (byte)(clock >> 8 & 63 | 128);
this.bytes[9] = (byte)(clock & 255);
for (i = 0; i < 6; ++i) {
this.bytes[10 + i] = node[i];
}
}
public int getVersion() {
return this.version;
}
public boolean equals(Object toUUID) {
if (this == toUUID) {
return true;
}
if (toUUID instanceof UUID) {
UUID uuid = (UUID)toUUID;
if (this.bytes == uuid.bytes) {
return true;
}
for (int i = 0; i < 16; ++i) {
if (this.bytes[i] == uuid.bytes[i]) continue;
return false;
}
return true;
}
return false;
}
public String toString() {
char[] chars = new char[36];
int j = 0;
for (int i = 0; i < 16; ++i) {
chars[j++] = hexDigits[this.bytes[i] >> 4 & 15];
chars[j++] = hexDigits[this.bytes[i] & 15];
if (i != 3 && i != 5 && i != 7 && i != 9) continue;
chars[j++] = 45;
}
return new String(chars);
}
public byte[] getBytes() {
return this.bytes;
}
public int hashCode() {
int h = this.hashCode;
if (h == 0) {
for (int i = 0; i < this.bytes.length; ++i) {
h = 31 * h + this.bytes[i];
}
this.hashCode = h;
}
return this.hashCode;
}
public static void init(File uuidStateFile) {
try {
internetAddress = InetAddress.getLocalHost().getAddress();
}
catch (Exception exc) {
throw new InternalError("Unable to get host address: " + exc);
}
uuidFile = uuidStateFile;
UUID.loadState();
}
public static synchronized UUID create() {
long time = UUID.getCurrentTime();
short clock = prevClock;
byte[] node = prevNode;
if (prevTime > time) {
clock = (short)(clock + 1);
}
UUID uuid = new UUID(node, time, clock);
UUID.saveState(time, clock, node);
return uuid;
}
private static byte[] computeNodeAddress() {
MessageDigest md5;
byte[] address = new byte[6];
int thread = Thread.currentThread().hashCode();
long time = System.currentTimeMillis();
ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
DataOutputStream out = new DataOutputStream(byteOut);
try {
if (internetAddress != null) {
out.write(internetAddress);
}
out.write(thread);
out.writeLong(time);
out.close();
}
catch (IOException exc) {
// empty catch block
}
byte[] rand = byteOut.toByteArray();
try {
md5 = MessageDigest.getInstance("MD5");
}
catch (Exception exc) {
throw new InternalError(exc.toString());
}
md5.update(rand);
byte[] temp = md5.digest();
for (int i = 0; i < 6; ++i) {
address[i] = temp[i + 5];
}
address[0] = (byte)(address[0] | -128);
return address;
}
private static synchronized long getCurrentTime() {
long now = 0;
boolean waitForTick = true;
while (waitForTick) {
now = (new Date().getTime() + gregorianOffset) * 10;
if (lastTime < now) {
uuidsThisTick = 0;
waitForTick = false;
continue;
}
if (uuidsThisTick >= 128) continue;
++uuidsThisTick;
waitForTick = false;
}
lastTime = now += (long)uuidsThisTick;
return now;
}
private static byte[] getIEEEAddress() {
byte[] address = new byte[6];
return address;
}
private static int random() {
return randomGenerator.nextInt();
}
private static void loadState() {
try {
ObjectInputStream s = new ObjectInputStream(new FileInputStream(uuidFile));
prevTime = s.readLong();
prevClock = s.readShort();
prevNode = new byte[6];
s.readFully(prevNode);
s.close();
}
catch (Exception exc) {
prevNode = UUID.computeNodeAddress();
prevTime = 0;
prevClock = (short)UUID.random();
}
}
private static void saveState(long time, short clock, byte[] node) {
prevTime = time;
prevClock = clock;
prevNode = node;
if (prevTime > nextSave) {
try {
ObjectOutputStream s = new ObjectOutputStream(new FileOutputStream(uuidFile));
s.writeLong(prevTime);
s.writeShort(prevClock);
s.write(prevNode);
s.close();
nextSave = prevTime + 100000;
}
catch (Exception exc) {
// empty catch block
}
}
}
}