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Development of version 3.0.0 #7 

Changed the uuid-creator to generate two types of ULID: default
(non-monotonic) and monotonic.

Until version 2.x.x this library only created monotonic ULIDs.

The version 3.0.0 breaks compatibility.

List of changes:

Changed UlidCreator
Created Ulid
Created UlidSpecCreator // abstract
Created DefaultUlidSpecCreator // implementation
Created MonotonicUlidSpecCreator // implementation
Removed UlidConverter
Removed UlidUtil
Removed UlidStruct
Create and update test cases
and more...

Test coverage: 93.5%
This commit is contained in:
Fabio Lima 2021-01-24 00:08:24 -03:00
parent 5289a469b2
commit 2ffa7a95dd
22 changed files with 575 additions and 1167 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

138
src/main/java/com/github/f4b6a3/ulid/util/internal/UlidStruct.java → src/main/java/com/github/f4b6a3/ulid/Ulid.java
View File

@ -22,34 +22,33 @@
* SOFTWARE.
*/
package com.github.f4b6a3.ulid.util.internal;
package com.github.f4b6a3.ulid;
import java.io.Serializable;
import java.util.UUID;
import com.github.f4b6a3.ulid.util.UlidValidator;
/**
* This class represents the structure of a ULID.
*
* It is for internal use and test cases in this library.
* This class represents a ULID.
*/
public final class UlidStruct {
public final class Ulid implements Serializable, Comparable<Ulid> {
public final long time;
public final long random1;
public final long random2;
private final long msb;
private final long lsb;
protected static final long TIMESTAMP_COMPONENT = 0x0000ffffffffffffL;
protected static final long HALF_RANDOM_COMPONENT = 0x000000ffffffffffL;
protected static final int STRING_LENGTH = 26;
public static final char[] BASE32_CHARS = //
protected static final char[] BASE32_CHARS = //
{ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', //
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', //
'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'V', 'W', 'X', 'Y', 'Z' };
public static final long[] BASE32_VALUES = new long[128];
protected static final long[] BASE32_VALUES = new long[128];
static {
for (int i = 0; i < BASE32_VALUES.length; i++) {
BASE32_VALUES[i] = -1;
}
// Numbers
BASE32_VALUES['0'] = 0x00;
BASE32_VALUES['1'] = 0x01;
@ -118,28 +117,19 @@ public final class UlidStruct {
}
private UlidStruct() {
this.time = 0;
this.random1 = 0;
this.random2 = 0;
private static final long serialVersionUID = 2625269413446854731L;
private Ulid() {
this.msb = 0;
this.lsb = 0;
}
private UlidStruct(long time, long random1, long random2) {
this.time = time & TIMESTAMP_COMPONENT;
this.random1 = random1 & HALF_RANDOM_COMPONENT;
this.random2 = random2 & HALF_RANDOM_COMPONENT;
private Ulid(UUID ulid) {
this.msb = ulid.getMostSignificantBits();
this.lsb = ulid.getLeastSignificantBits();
}
private UlidStruct(UUID ulid) {
final long msb = ulid.getMostSignificantBits();
final long lsb = ulid.getLeastSignificantBits();
this.time = (msb >>> 16);
this.random1 = ((msb & 0x000000000000ffffL) << 24) | (lsb >>> 40);
this.random2 = (lsb & 0x000000ffffffffffL);
}
private UlidStruct(String ulid) {
private Ulid(String ulid) {
final char[] chars = ulid == null ? new char[0] : ulid.toCharArray();
UlidValidator.validate(chars);
@ -177,26 +167,41 @@ public final class UlidStruct {
r2 |= BASE32_VALUES[chars[0x18]] << 5;
r2 |= BASE32_VALUES[chars[0x19]];
this.time = tm;
this.random1 = r1;
this.random2 = r2;
this.msb = (tm << 16) | (r1 >>> 24);
this.lsb = (r1 << 40) | (r2 & 0xffffffffffL);
}
public static UlidStruct of(long time, long random1, long random2) {
return new UlidStruct(time, random1, random2);
private Ulid(long msb, long lsb) {
this.msb = msb;
this.lsb = lsb;
}
public static UlidStruct of(UUID ulid) {
return new UlidStruct(ulid);
public static Ulid of(UUID ulid) {
return new Ulid(ulid);
}
public static UlidStruct of(String ulid) {
return new UlidStruct(ulid);
public static Ulid of(String ulid) {
return new Ulid(ulid);
}
public static Ulid of(long msb, long lsb) {
return new Ulid(msb, lsb);
}
public UUID toUuid() {
return new UUID(this.msb, this.lsb);
}
@Override
public String toString() {
final char[] chars = new char[26];
final char[] chars = new char[STRING_LENGTH];
long long0 = this.msb;
long long1 = this.lsb;
long time = long0 >>> 16;
long random1 = ((long0 & 0xffffL) << 24) | (long1 >>> 40);
long random2 = (long1 & 0xffffffffffL);
chars[0x00] = BASE32_CHARS[(int) (time >>> 45 & 0b11111)];
chars[0x01] = BASE32_CHARS[(int) (time >>> 40 & 0b11111)];
@ -230,33 +235,16 @@ public final class UlidStruct {
return new String(chars);
}
public String toString4() {
// apply RFC-4122 version 4 and variant 2
final long random1v4 = ((this.random1 & 0x0fff3fffffL) | 0x4000000000L) | 0x0000800000L;
return UlidStruct.of(this.time, random1v4, this.random2).toString();
}
public UUID toUuid() {
final long msb = (time << 16) | (random1 >>> 24);
final long lsb = (random1 << 40) | random2;
return new UUID(msb, lsb);
}
public UUID toUuid4() {
// apply RFC-4122 version 4 and variant 2
final long random1v4 = ((this.random1 & 0x0fff3fffffL) | 0x4000000000L) | 0x0000800000L;
return UlidStruct.of(this.time, random1v4, this.random2).toUuid();
public long getTimestamp() {
return this.msb >>> 16;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (int) (random1 ^ (random1 >>> 32));
result = prime * result + (int) (random2 ^ (random2 >>> 32));
result = prime * result + (int) (time ^ (time >>> 32));
result = prime * result + (int) (lsb ^ (lsb >>> 32));
result = prime * result + (int) (msb ^ (msb >>> 32));
return result;
}
@ -268,13 +256,29 @@ public final class UlidStruct {
return false;
if (getClass() != obj.getClass())
return false;
UlidStruct other = (UlidStruct) obj;
if (random1 != other.random1)
Ulid other = (Ulid) obj;
if (lsb != other.lsb)
return false;
if (random2 != other.random2)
return false;
if (time != other.time)
if (msb != other.msb)
return false;
return true;
}
@Override
public int compareTo(Ulid other) {
if (this.msb < other.msb)
return -1;
if (this.msb > other.msb)
return 1;
if (this.lsb < other.lsb)
return -1;
if (this.lsb > other.lsb)
return 1;
return 0;
}
}

108
src/main/java/com/github/f4b6a3/ulid/UlidCreator.java
View File

@ -24,116 +24,44 @@
package com.github.f4b6a3.ulid;
import java.util.UUID;
import com.github.f4b6a3.ulid.creator.UlidSpecCreator;
import com.github.f4b6a3.ulid.exception.InvalidUlidException;
import com.github.f4b6a3.ulid.util.UlidConverter;
import com.github.f4b6a3.ulid.creator.impl.DefaultUlidSpecCreator;
import com.github.f4b6a3.ulid.creator.impl.MonotonicUlidSpecCreator;
/**
* A factory for Universally Unique Lexicographically Sortable Identifiers.
*
* See the ULID spec: https://github.com/ulid/spec
*/
public final class UlidCreator {
private UlidCreator() {
}
/**
* Returns a ULID as GUID from a string.
*
* The input string must be encoded to Crockford's base32, following the ULID
* specification.
*
* An exception is thrown if the ULID string is invalid.
*
* @param ulid a ULID string
* @return a UUID
* @throws InvalidUlidException if invalid
*/
public static UUID fromString(String ulid) {
return UlidConverter.fromString(ulid);
public static Ulid getUlid() {
return DefaultCreatorHolder.INSTANCE.create();
}
/**
* Convert a UUID to ULID string
*
* The returning string is encoded to Crockford's base32.
*
* @param uuid a UUID
* @return a ULID string
*/
public static String toString(UUID ulid) {
return UlidConverter.toString(ulid);
public static Ulid getUlid(Long timestamp) {
return DefaultCreatorHolder.INSTANCE.create(timestamp);
}
/**
* Returns a ULID as GUID.
*
* The random component is generated by a secure random number generator:
* {@link java.security.SecureRandom}.
*
* @return a UUID
*/
public static UUID getUlid() {
return UlidSpecCreatorHolder.INSTANCE.create();
public static Ulid getMonotonicUlid() {
return MonotonicCreatorHolder.INSTANCE.create();
}
/**
* Returns a ULID as GUID.
*
* It is compatible with the RFC-4122 UUID v4.
*
* The random component is generated by a secure random number generator:
* {@link java.security.SecureRandom}.
*
* @return a UUID
*/
public static UUID getUlid4() {
return UlidSpecCreatorHolder.INSTANCE.create4();
public static Ulid getMonotonicUlid(Long timestamp) {
return MonotonicCreatorHolder.INSTANCE.create(timestamp);
}
/**
* Returns a ULID string.
*
* The returning string is encoded to Crockford's base32.
*
* The random component is generated by a secure random number generator:
* {@link java.security.SecureRandom}.
*
* @return a ULID string
*/
public static String getUlidString() {
return UlidSpecCreatorHolder.INSTANCE.createString();
public static DefaultUlidSpecCreator getDefaultCreator() {
return new DefaultUlidSpecCreator();
}
/**
* Returns a ULID string.
*
* It is compatible with the RFC-4122 UUID v4.
*
* The returning string is encoded to Crockford's base32.
*
* The random component is generated by a secure random number generator:
* {@link java.security.SecureRandom}.
*
* @return a ULID string
*/
public static String getUlidString4() {
return UlidSpecCreatorHolder.INSTANCE.createString4();
public static MonotonicUlidSpecCreator getMonotonicCreator() {
return new MonotonicUlidSpecCreator();
}
/**
* Return a GUID creator for direct use.
*
* @return a {@link UlidSpecCreator}
*/
public static UlidSpecCreator getUlidSpecCreator() {
return new UlidSpecCreator();
private static class DefaultCreatorHolder {
static final UlidSpecCreator INSTANCE = getDefaultCreator();
}
private static class UlidSpecCreatorHolder {
static final UlidSpecCreator INSTANCE = getUlidSpecCreator();
private static class MonotonicCreatorHolder {
static final UlidSpecCreator INSTANCE = getMonotonicCreator();
}
}

197
src/main/java/com/github/f4b6a3/ulid/creator/UlidSpecCreator.java
View File

@ -25,35 +25,15 @@
package com.github.f4b6a3.ulid.creator;
import java.util.Random;
import java.util.UUID;
import com.github.f4b6a3.ulid.Ulid;
import com.github.f4b6a3.ulid.strategy.RandomStrategy;
import com.github.f4b6a3.ulid.strategy.random.DefaultRandomStrategy;
import com.github.f4b6a3.ulid.strategy.random.OtherRandomStrategy;
import com.github.f4b6a3.ulid.strategy.TimestampStrategy;
import com.github.f4b6a3.ulid.strategy.timestamp.DefaultTimestampStrategy;
import com.github.f4b6a3.ulid.util.internal.UlidStruct;
/**
* Factory that creates lexicographically sortable GUIDs, based on the ULID
* specification - Universally Unique Lexicographically Sortable Identifier.
*
* ULID specification: https://github.com/ulid/spec
*/
public class UlidSpecCreator {
protected long random1 = 0;
protected long random2 = 0;
protected long randomMax1;
protected long randomMax2;
protected static final long HALF_RANDOM_COMPONENT = 0x000000ffffffffffL;
protected static final long INCREMENT_MAX = 0x0000010000000000L;
protected long previousTimestamp;
protected static final String OVERRUN_MESSAGE = "The system overran the generator by requesting too many ULIDs.";
public abstract class UlidSpecCreator {
protected TimestampStrategy timestampStrategy;
protected RandomStrategy randomStrategy;
@ -63,164 +43,11 @@ public class UlidSpecCreator {
this.randomStrategy = new DefaultRandomStrategy();
}
/**
*
* Return a GUID based on the ULID specification.
*
* A ULID has two parts:
*
* 1. A part of 48 bits that represent the amount of milliseconds since Unix
* Epoch, 1 January 1970.
*
* 2. A part of 80 bits that has a random value generated a secure random
* generator.
*
* The random part is reset to a new value every time the millisecond part
* changes.
*
* If more than one GUID is generated within the same millisecond, the random
* part is incremented by one.
*
* The maximum GUIDs that can be generated per millisecond is 2^80.
*
* The random part is generated by a secure random number generator:
* {@link java.security.SecureRandom}.
*
* ### Specification of Universally Unique Lexicographically Sortable ID
*
* #### Components
*
* ##### Timestamp
*
* It is a 48 bit integer. UNIX-time in milliseconds. Won't run out of space
* 'til the year 10889 AD.
*
* ##### Randomness
*
* It is a 80 bits integer. Cryptographically secure source of randomness, if
* possible.
*
* #### Sorting
*
* The left-most character must be sorted first, and the right-most character
* sorted last (lexical order). The default ASCII character set must be used.
* Within the same millisecond, sort order is not guaranteed.
*
* #### Monotonicity
*
* When generating a ULID within the same millisecond, we can provide some
* guarantees regarding sort order. Namely, if the same millisecond is detected,
* the random component is incremented by 1 bit in the least significant bit
* position (with carrying).
*
* If, in the extremely unlikely event that, you manage to generate more than
* 2^80 ULIDs within the same millisecond, or cause the random component to
* overflow with less, the generation will fail.
*
* @return {@link UUID} a GUID value
*/
public synchronized UUID create() {
return UlidStruct.of(this.getTimestamp(), random1, random2).toUuid();
public synchronized Ulid create() {
return create(null);
}
/**
*
* Return a GUID based on the ULID specification.
*
* It is compatible with the RFC-4122 UUID v4.
*
* @return {@link UUID} a GUID value
*/
public synchronized UUID create4() {
return UlidStruct.of(this.getTimestamp(), random1, random2).toUuid4();
}
/**
* Returns a ULID string.
*
* The returning string is encoded to Crockford's base32.
*
* The random component is generated by a secure random number generator:
* {@link java.security.SecureRandom}.
*
* @return a ULID string
*/
public synchronized String createString() {
return UlidStruct.of(this.getTimestamp(), random1, random2).toString();
}
/**
* Returns a ULID string.
*
* It is compatible with the RFC-4122 UUID v4.
*
* The returning string is encoded to Crockford's base32.
*
* The random component is generated by a secure random number generator:
* {@link java.security.SecureRandom}.
*
* @return a ULID string
*/
public synchronized String createString4() {
return UlidStruct.of(this.getTimestamp(), random1, random2).toString4();
}
/**
* Return the current timestamp and resets or increments the random part.
*
* @return timestamp
*/
protected synchronized long getTimestamp() {
final long timestamp = this.timestampStrategy.getTimestamp();
if (timestamp == this.previousTimestamp) {
this.increment();
} else {
this.reset();
}
this.previousTimestamp = timestamp;
return timestamp;
}
/**
* Reset the random part of the GUID.
*/
protected synchronized void reset() {
// Get random values
final byte[] bytes = new byte[10];
this.randomStrategy.nextBytes(bytes);
this.random1 = (long) (bytes[0x0] & 0xff) << 32;
this.random1 |= (long) (bytes[0x1] & 0xff) << 24;
this.random1 |= (long) (bytes[0x2] & 0xff) << 16;
this.random1 |= (long) (bytes[0x3] & 0xff) << 8;
this.random1 |= (long) (bytes[0x4] & 0xff);
this.random2 = (long) (bytes[0x5] & 0xff) << 32;
this.random2 |= (long) (bytes[0x6] & 0xff) << 24;
this.random2 |= (long) (bytes[0x7] & 0xff) << 16;
this.random2 |= (long) (bytes[0x8] & 0xff) << 8;
this.random2 |= (long) (bytes[0x9] & 0xff);
// Save the random values
this.randomMax1 = this.random1 | INCREMENT_MAX;
this.randomMax2 = this.random2 | INCREMENT_MAX;
}
/**
* Increment the random part of the GUID.
*/
protected synchronized void increment() {
if (++this.random2 >= this.randomMax2) {
this.random2 = this.random2 & HALF_RANDOM_COMPONENT;
if ((++this.random1 >= this.randomMax1)) {
this.reset();
}
}
}
public abstract Ulid create(Long timestamp);
/**
* Used for changing the timestamp strategy.
@ -266,18 +93,4 @@ public class UlidSpecCreator {
this.randomStrategy = new OtherRandomStrategy(random);
return (T) this;
}
/**
* For unit tests
*/
protected long extractRandom1(UUID uuid) {
return ((uuid.getMostSignificantBits() & 0x000000000000ffff) << 24) | (uuid.getLeastSignificantBits() >>> 40);
}
/**
* For unit tests
*/
protected long extractRandom2(UUID uuid) {
return uuid.getLeastSignificantBits() & HALF_RANDOM_COMPONENT;
}
}

59
src/main/java/com/github/f4b6a3/ulid/util/UlidConverter.java → src/main/java/com/github/f4b6a3/ulid/creator/impl/DefaultUlidSpecCreator.java
View File

@ -22,43 +22,38 @@
* SOFTWARE.
*/
package com.github.f4b6a3.ulid.util;
package com.github.f4b6a3.ulid.creator.impl;
import java.util.UUID;
import com.github.f4b6a3.ulid.Ulid;
import com.github.f4b6a3.ulid.creator.UlidSpecCreator;
import com.github.f4b6a3.ulid.exception.InvalidUlidException;
import com.github.f4b6a3.ulid.util.internal.UlidStruct;
public final class DefaultUlidSpecCreator extends UlidSpecCreator {
public final class UlidConverter {
@Override
public synchronized Ulid create(final Long timestamp) {
private UlidConverter() {
}
final long time = timestamp != null ? timestamp : this.timestampStrategy.getTimestamp();
/**
* Convert a UUID to ULID string
*
* The returning string is encoded to Crockford's base32.
*
* @param ulid a UUID
* @return a ULID
*/
public static String toString(final UUID ulid) {
return UlidStruct.of(ulid).toString();
}
// Get random values
final byte[] bytes = new byte[10];
this.randomStrategy.nextBytes(bytes);
/**
* Converts a ULID string to a UUID.
*
* The input string must be encoded to Crockford's base32, following the ULID
* specification.
*
* An exception is thrown if the ULID string is invalid.
*
* @param ulid a ULID
* @return a UUID if valid
* @throws InvalidUlidException if invalid
*/
public static UUID fromString(final String ulid) {
return UlidStruct.of(ulid).toUuid();
long msb = 0;
long lsb = 0;
msb |= time << 16;
msb |= (long) (bytes[0x0] & 0xff) << 8;
msb |= (long) (bytes[0x1] & 0xff);
lsb |= (long) (bytes[0x2] & 0xff) << 56;
lsb |= (long) (bytes[0x3] & 0xff) << 48;
lsb |= (long) (bytes[0x4] & 0xff) << 40;
lsb |= (long) (bytes[0x5] & 0xff) << 32;
lsb |= (long) (bytes[0x6] & 0xff) << 24;
lsb |= (long) (bytes[0x7] & 0xff) << 16;
lsb |= (long) (bytes[0x8] & 0xff) << 8;
lsb |= (long) (bytes[0x9] & 0xff);
return Ulid.of(msb, lsb);
}
}

69
src/main/java/com/github/f4b6a3/ulid/creator/impl/MonotonicUlidSpecCreator.java Normal file
View File

@ -0,0 +1,69 @@
/*
* MIT License
*
* Copyright (c) 2020 Fabio Lima
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.github.f4b6a3.ulid.creator.impl;
import com.github.f4b6a3.ulid.Ulid;
import com.github.f4b6a3.ulid.creator.UlidSpecCreator;
public final class MonotonicUlidSpecCreator extends UlidSpecCreator {
protected long msb = 0;
protected long lsb = 0;
protected long previousTimestamp;
public synchronized Ulid create(final Long timestamp) {
final long time = timestamp != null ? timestamp : this.timestampStrategy.getTimestamp();
if (time == this.previousTimestamp) {
this.lsb++;
} else {
// Get random values
final byte[] bytes = new byte[10];
this.randomStrategy.nextBytes(bytes);
msb = 0;
lsb = 0;
msb |= time << 16;
msb |= (long) (bytes[0x0] & 0xff) << 8;
msb |= (long) (bytes[0x1] & 0xff);
lsb |= (long) (bytes[0x2] & 0xff) << 56;
lsb |= (long) (bytes[0x3] & 0xff) << 48;
lsb |= (long) (bytes[0x4] & 0xff) << 40;
lsb |= (long) (bytes[0x5] & 0xff) << 32;
lsb |= (long) (bytes[0x6] & 0xff) << 24;
lsb |= (long) (bytes[0x7] & 0xff) << 16;
lsb |= (long) (bytes[0x8] & 0xff) << 8;
lsb |= (long) (bytes[0x9] & 0xff);
}
this.previousTimestamp = time;
return Ulid.of(msb, lsb);
}
}

1
src/main/java/com/github/f4b6a3/ulid/strategy/RandomStrategy.java
View File

@ -24,6 +24,7 @@
package com.github.f4b6a3.ulid.strategy;
@FunctionalInterface
public interface RandomStrategy {
void nextBytes(byte[] bytes);
}

1
src/main/java/com/github/f4b6a3/ulid/strategy/TimestampStrategy.java
View File

@ -24,6 +24,7 @@
package com.github.f4b6a3.ulid.strategy;
@FunctionalInterface
public interface TimestampStrategy {
long getTimestamp();
}

83
src/main/java/com/github/f4b6a3/ulid/util/UlidUtil.java
View File

@ -1,83 +0,0 @@
/*
* MIT License
*
* Copyright (c) 2020 Fabio Lima
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.github.f4b6a3.ulid.util;
import java.time.Instant;
import java.util.UUID;
import com.github.f4b6a3.ulid.util.internal.UlidStruct;
public final class UlidUtil {
protected static final int BASE_32 = 32;
protected static final int ULID_LENGTH = 26;
// Include 'O'->ZERO, 'I'->ONE and 'L'->ONE
protected static final char[] ALPHABET_CROCKFORD = "0123456789ABCDEFGHJKMNPQRSTVWXYZOIL".toCharArray();
protected static final char[] ALPHABET_JAVA = "0123456789abcdefghijklmnopqrstuv011".toCharArray();
private UlidUtil() {
}
public static long extractUnixMilliseconds(UUID ulid) {
return extractTimestamp(ulid);
}
public static long extractUnixMilliseconds(String ulid) {
UlidValidator.validate(ulid);
return extractTimestamp(ulid);
}
public static Instant extractInstant(UUID ulid) {
long milliseconds = extractTimestamp(ulid);
return Instant.ofEpochMilli(milliseconds);
}
public static Instant extractInstant(String ulid) {
UlidValidator.validate(ulid);
long milliseconds = extractTimestamp(ulid);
return Instant.ofEpochMilli(milliseconds);
}
protected static long extractTimestamp(UUID ulid) {
return (ulid.getMostSignificantBits() >>> 16);
}
protected static long extractTimestamp(String ulid) {
return UlidStruct.of(ulid).time;
}
public static String extractTimestampComponent(String ulid) {
UlidValidator.validate(ulid);
return ulid.substring(0, 10);
}
public static String extractRandomnessComponent(String ulid) {
UlidValidator.validate(ulid);
return ulid.substring(10, ULID_LENGTH);
}
}

79
src/main/java/com/github/f4b6a3/ulid/util/UlidValidator.java
View File

@ -26,11 +26,82 @@ package com.github.f4b6a3.ulid.util;
import com.github.f4b6a3.ulid.exception.InvalidUlidException;
import static com.github.f4b6a3.ulid.util.internal.UlidStruct.BASE32_VALUES;
public final class UlidValidator {
protected static final int ULID_LENGTH = 26;
protected static final int STRING_LENGTH = 26;
protected static final long[] BASE32_VALUES = new long[128];
static {
for (int i = 0; i < BASE32_VALUES.length; i++) {
BASE32_VALUES[i] = -1;
}
// Numbers
BASE32_VALUES['0'] = 0x00;
BASE32_VALUES['1'] = 0x01;
BASE32_VALUES['2'] = 0x02;
BASE32_VALUES['3'] = 0x03;
BASE32_VALUES['4'] = 0x04;
BASE32_VALUES['5'] = 0x05;
BASE32_VALUES['6'] = 0x06;
BASE32_VALUES['7'] = 0x07;
BASE32_VALUES['8'] = 0x08;
BASE32_VALUES['9'] = 0x09;
// Lower case
BASE32_VALUES['a'] = 0x0a;
BASE32_VALUES['b'] = 0x0b;
BASE32_VALUES['c'] = 0x0c;
BASE32_VALUES['d'] = 0x0d;
BASE32_VALUES['e'] = 0x0e;
BASE32_VALUES['f'] = 0x0f;
BASE32_VALUES['g'] = 0x10;
BASE32_VALUES['h'] = 0x11;
BASE32_VALUES['j'] = 0x12;
BASE32_VALUES['k'] = 0x13;
BASE32_VALUES['m'] = 0x14;
BASE32_VALUES['n'] = 0x15;
BASE32_VALUES['p'] = 0x16;
BASE32_VALUES['q'] = 0x17;
BASE32_VALUES['r'] = 0x18;
BASE32_VALUES['s'] = 0x19;
BASE32_VALUES['t'] = 0x1a;
BASE32_VALUES['v'] = 0x1b;
BASE32_VALUES['w'] = 0x1c;
BASE32_VALUES['x'] = 0x1d;
BASE32_VALUES['y'] = 0x1e;
BASE32_VALUES['z'] = 0x1f;
// Lower case OIL
BASE32_VALUES['o'] = 0x00;
BASE32_VALUES['i'] = 0x01;
BASE32_VALUES['l'] = 0x01;
// Upper case
BASE32_VALUES['A'] = 0x0a;
BASE32_VALUES['B'] = 0x0b;
BASE32_VALUES['C'] = 0x0c;
BASE32_VALUES['D'] = 0x0d;
BASE32_VALUES['E'] = 0x0e;
BASE32_VALUES['F'] = 0x0f;
BASE32_VALUES['G'] = 0x10;
BASE32_VALUES['H'] = 0x11;
BASE32_VALUES['J'] = 0x12;
BASE32_VALUES['K'] = 0x13;
BASE32_VALUES['M'] = 0x14;
BASE32_VALUES['N'] = 0x15;
BASE32_VALUES['P'] = 0x16;
BASE32_VALUES['Q'] = 0x17;
BASE32_VALUES['R'] = 0x18;
BASE32_VALUES['S'] = 0x19;
BASE32_VALUES['T'] = 0x1a;
BASE32_VALUES['V'] = 0x1b;
BASE32_VALUES['W'] = 0x1c;
BASE32_VALUES['X'] = 0x1d;
BASE32_VALUES['Y'] = 0x1e;
BASE32_VALUES['Z'] = 0x1f;
// Upper case OIL
BASE32_VALUES['O'] = 0x00;
BASE32_VALUES['I'] = 0x01;
BASE32_VALUES['L'] = 0x01;
}
private UlidValidator() {
}
@ -147,6 +218,6 @@ public final class UlidValidator {
return false;
}
}
return (c.length - hyphen) == ULID_LENGTH;
return (c.length - hyphen) == STRING_LENGTH;
}
}

24
src/test/java/com/github/f4b6a3/ulid/TestSuite.java
View File

@ -4,22 +4,22 @@ import org.junit.runner.RunWith;
import org.junit.runners.Suite;
import com.github.f4b6a3.ulid.creator.UlidSpecCreatorTest;
import com.github.f4b6a3.ulid.ulid.UlidCreatorUuidTest;
import com.github.f4b6a3.ulid.ulid.UlidCreatorStringTest;
import com.github.f4b6a3.ulid.util.UlidConverterTest;
import com.github.f4b6a3.ulid.util.UlidUtilTest;
import com.github.f4b6a3.ulid.ulid.UlidCreatorDefaultTest;
import com.github.f4b6a3.ulid.ulid.UlidCreatorDefaultStringTest;
import com.github.f4b6a3.ulid.ulid.UlidCreatorMonotonicTest;
import com.github.f4b6a3.ulid.ulid.UlidCreatorMonotonicStringTest;
import com.github.f4b6a3.ulid.util.UlidValidatorTest;
import com.github.f4b6a3.ulid.util.internal.UlidStructTest;
import com.github.f4b6a3.ulid.util.internal.UlidTest;
@RunWith(Suite.class)
@Suite.SuiteClasses({
UlidCreatorUuidTest.class,
UlidCreatorStringTest.class,
UlidSpecCreatorTest.class,
UlidConverterTest.class,
UlidUtilTest.class,
UlidValidatorTest.class,
UlidStructTest.class,
UlidCreatorDefaultTest.class,
UlidCreatorDefaultStringTest.class,
UlidCreatorMonotonicTest.class,
UlidCreatorMonotonicStringTest.class,
UlidSpecCreatorTest.class,
UlidValidatorTest.class,
UlidTest.class,
})
/**

16
src/test/java/com/github/f4b6a3/ulid/UniquenessTest.java
View File

@ -1,8 +1,6 @@
package com.github.f4b6a3.ulid;
import java.util.HashSet;
import java.util.UUID;
import com.github.f4b6a3.ulid.UlidCreator;
import com.github.f4b6a3.ulid.creator.UlidSpecCreator;
import com.github.f4b6a3.ulid.strategy.timestamp.FixedTimestampStretegy;
@ -21,11 +19,11 @@ public class UniquenessTest {
private int requestCount; // Number of requests for thread
// private long[][] cacheLong; // Store values generated per thread
private HashSet<UUID> hashSet;
private HashSet<Ulid> hashSet;
private boolean verbose; // Show progress or not
// GUID creator based on ULID spec
// ULID Spec creator
private UlidSpecCreator creator;
/**
@ -92,20 +90,20 @@ public class UniquenessTest {
for (int i = 0; i < max; i++) {
// Request a UUID
UUID uuid = creator.create();
Ulid ulid = creator.create();
if (verbose) {
// Calculate and show progress
progress = (int) ((i * 1.0 / max) * 100);
if (progress % 10 == 0) {
System.out.println(String.format("[Thread %06d] %s %s %s%%", id, uuid, i, (int) progress));
System.out.println(String.format("[Thread %06d] %s %s %s%%", id, ulid, i, (int) progress));
}
}
synchronized (hashSet) {
// Insert the value in cache, if it does not exist in it.
if (!hashSet.add(uuid)) {
if (!hashSet.add(ulid)) {
System.err.println(
String.format("[Thread %06d] %s %s %s%% [DUPLICATE]", id, uuid, i, (int) progress));
String.format("[Thread %06d] %s %s %s%% [DUPLICATE]", id, ulid, i, (int) progress));
}
}
}
@ -118,7 +116,7 @@ public class UniquenessTest {
}
public static void execute(boolean verbose, int threadCount, int requestCount) {
UlidSpecCreator creator = UlidCreator.getUlidSpecCreator()
UlidSpecCreator creator = UlidCreator.getMonotonicCreator()
.withTimestampStrategy(new FixedTimestampStretegy(System.currentTimeMillis()));
UniquenessTest test = new UniquenessTest(threadCount, requestCount, creator, verbose);

18
src/test/java/com/github/f4b6a3/ulid/creator/UlidSpecCreatorMock.java
View File

@ -1,18 +0,0 @@
package com.github.f4b6a3.ulid.creator;
import com.github.f4b6a3.ulid.creator.UlidSpecCreator;
class UlidSpecCreatorMock extends UlidSpecCreator {
public UlidSpecCreatorMock(long random1, long random2, long randomMax1, long randomMax2, long previousTimestamp) {
super();
this.random1 = random1;
this.random2 = random2;
this.randomMax1 = randomMax1;
this.randomMax2 = randomMax2;
this.previousTimestamp = previousTimestamp;
}
}

210
src/test/java/com/github/f4b6a3/ulid/creator/UlidSpecCreatorTest.java
View File

@ -1,6 +1,5 @@
package com.github.f4b6a3.ulid.creator;
import java.math.BigInteger;
import java.util.HashSet;
import java.util.Random;
import java.util.Set;
@ -8,8 +7,8 @@ import java.util.UUID;
import org.junit.Test;
import com.github.f4b6a3.ulid.Ulid;
import com.github.f4b6a3.ulid.UlidCreator;
import com.github.f4b6a3.ulid.strategy.timestamp.FixedTimestampStretegy;
import static org.junit.Assert.*;
@ -17,14 +16,12 @@ public class UlidSpecCreatorTest {
private static final int DEFAULT_LOOP_MAX = 1_000_000;
private static final long TIMESTAMP = System.currentTimeMillis();
private static final Random RANDOM = new Random();
protected static final String DUPLICATE_UUID_MSG = "A duplicate ULID was created.";
protected static final int THREAD_TOTAL = availableProcessors();
private static final Random RANDOM = new Random();
private static int availableProcessors() {
int processors = Runtime.getRuntime().availableProcessors();
if (processors < 4) {
@ -34,185 +31,53 @@ public class UlidSpecCreatorTest {
}
@Test
public void testRandomMostSignificantBits() {
UlidSpecCreator creator = new UlidSpecCreator();
creator.withTimestampStrategy(new FixedTimestampStretegy(TIMESTAMP));
UUID uuid = creator.create();
long firstRand1 = creator.extractRandom1(uuid);
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
uuid = creator.create();
public void testGetUlidTimestamp() {
for (int i = 0; i < 100; i++) {
long timestamp = RANDOM.nextLong() & 0x0000ffffffffffffL;
Ulid ulid = UlidCreator.getUlid(timestamp);
assertEquals(timestamp, ulid.getTimestamp());
}
long lastRand1 = creator.extractRandom1(uuid);
long expected1 = firstRand1;
assertEquals(String.format("The last high random should be iqual to the first %s.", expected1), expected1,
lastRand1);
creator.withTimestampStrategy(new FixedTimestampStretegy(TIMESTAMP + 1));
uuid = creator.create();
lastRand1 = uuid.getMostSignificantBits();
assertNotEquals("The last high random should be random after timestamp changed.", firstRand1, lastRand1);
}
@Test
public void testRandomLeastSignificantBits() {
UlidSpecCreator creator = new UlidSpecCreator();
creator.withTimestampStrategy(new FixedTimestampStretegy(TIMESTAMP));
UUID uuid = creator.create();
long firstRnd2 = creator.extractRandom2(uuid);
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
uuid = creator.create();
public void testGetMonotonicUlidTimestamp() {
for (int i = 0; i < 100; i++) {
long timestamp = RANDOM.nextLong() & 0x0000ffffffffffffL;
Ulid ulid = UlidCreator.getMonotonicUlid(timestamp);
assertEquals(timestamp, ulid.getTimestamp());
}
long lastRand2 = creator.extractRandom2(uuid);
long expected = firstRnd2 + DEFAULT_LOOP_MAX;
assertEquals(String.format("The last low random should be iqual to %s.", expected), expected, lastRand2);
long notExpected = firstRnd2 + DEFAULT_LOOP_MAX + 1;
creator.withTimestampStrategy(new FixedTimestampStretegy(TIMESTAMP + 1));
uuid = creator.create();
lastRand2 = uuid.getLeastSignificantBits();
assertNotEquals("The last low random should be random after timestamp changed.", notExpected, lastRand2);
}
@Test
public void testIncrementOfRandomLeastSignificantBits() {
UlidSpecCreator creator = new UlidSpecCreator();
creator.withTimestampStrategy(new FixedTimestampStretegy(TIMESTAMP));
creator.create();
long random2 = creator.random2;
UUID uuid = new UUID(0, 0);
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
uuid = creator.create();
}
long expected2 = random2 + DEFAULT_LOOP_MAX;
long rand2 = creator.random2;
assertEquals("Wrong low random after loop.", expected2, rand2);
rand2 = creator.extractRandom2(uuid);
assertEquals("Wrong low random after loop.", expected2, rand2);
}
@Test
public void testIncrementOfRandomMostSignificantBits() {
UlidSpecCreator creator = new UlidSpecCreator();
creator.withTimestampStrategy(new FixedTimestampStretegy(TIMESTAMP));
creator.create();
long random1 = creator.random1;
UUID uuid = new UUID(0, 0);
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
uuid = creator.create();
}
long expected1 = random1;
long rand1 = creator.random1;
assertEquals("Wrong high random after loop.", expected1, rand1);
rand1 = creator.extractRandom1(uuid);
assertEquals("Wrong high random after loop.", expected1, rand1);
}
@Test
public void testIncrementRandomComponentMaximum1() {
long random1 = 0x000000ffffffffffL;
long random2 = 0x000000ffffffffffL;
long max1 = random1 | UlidSpecCreatorMock.INCREMENT_MAX;
long max2 = random2 | UlidSpecCreatorMock.INCREMENT_MAX;
random1 = max1;
random2 = max2 - DEFAULT_LOOP_MAX;
random2--; // Adjust
UlidSpecCreatorMock creator = new UlidSpecCreatorMock(random1, random2, max1, max2, TIMESTAMP);
creator.withTimestampStrategy(new FixedTimestampStretegy(TIMESTAMP));
UUID uuid = new UUID(0, 0);
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
uuid = creator.create();
}
long hi1 = random1 & UlidSpecCreatorMock.HALF_RANDOM_COMPONENT;
long lo1 = random2 & UlidSpecCreatorMock.HALF_RANDOM_COMPONENT;
String concat1 = (Long.toHexString(hi1) + Long.toHexString(lo1));
BigInteger bigint1 = new BigInteger(concat1, 16);
long hi2 = creator.extractRandom1(uuid);
long lo2 = creator.extractRandom2(uuid);
String concat2 = (Long.toHexString(hi2) + Long.toHexString(lo2));
BigInteger bigint2 = new BigInteger(concat2, 16);
assertEquals(bigint1.add(BigInteger.valueOf(DEFAULT_LOOP_MAX)), bigint2);
// This line resets the random component
uuid = creator.create();
}
@Test
public void testIncrementRandomComponentMaximum2() {
long random1 = (RANDOM.nextLong() & UlidSpecCreatorMock.HALF_RANDOM_COMPONENT);
long random2 = (RANDOM.nextLong() & UlidSpecCreatorMock.HALF_RANDOM_COMPONENT);
long max1 = random1 | UlidSpecCreatorMock.INCREMENT_MAX;
long max2 = random2 | UlidSpecCreatorMock.INCREMENT_MAX;
random1 = max1;
random2 = max2 - DEFAULT_LOOP_MAX;
random2--; // Adjust
UlidSpecCreatorMock creator = new UlidSpecCreatorMock(random1, random2, max1, max2, TIMESTAMP);
creator.withTimestampStrategy(new FixedTimestampStretegy(TIMESTAMP));
UUID uuid = new UUID(0, 0);
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
uuid = creator.create();
}
long rand1 = creator.extractRandom1(uuid);
long expected1 = (max1 & UlidSpecCreatorMock.HALF_RANDOM_COMPONENT);
assertEquals("Incorrect high random after loop.", expected1, rand1);
long rand2 = creator.extractRandom2(uuid);
long expected2 = (max2 & UlidSpecCreatorMock.HALF_RANDOM_COMPONENT) - 1;
assertEquals("Incorrect low random after loop.", expected2, rand2);
long hi1 = random1 & UlidSpecCreatorMock.HALF_RANDOM_COMPONENT;
long lo1 = random2 & UlidSpecCreatorMock.HALF_RANDOM_COMPONENT;
String concat1 = (Long.toHexString(hi1) + Long.toHexString(lo1));
BigInteger bigint1 = new BigInteger(concat1, 16);
long hi2 = creator.extractRandom1(uuid);
long lo2 = creator.extractRandom2(uuid);
String concat2 = (Long.toHexString(hi2) + Long.toHexString(lo2));
BigInteger bigint2 = new BigInteger(concat2, 16);
assertEquals(bigint1.add(BigInteger.valueOf(DEFAULT_LOOP_MAX)), bigint2);
// This line resets the random component
creator.create();
}
@Test
public void testGetUlidParallelGeneratorsShouldCreateUniqueUlids() throws InterruptedException {
public void testGetDefaultUlidInParallel() throws InterruptedException {
Thread[] threads = new Thread[THREAD_TOTAL];
TestThread.clearHashSet();
// Instantiate and start many threads
for (int i = 0; i < THREAD_TOTAL; i++) {
threads[i] = new TestThread(UlidCreator.getUlidSpecCreator(), DEFAULT_LOOP_MAX);
threads[i] = new TestThread(UlidCreator.getDefaultCreator(), DEFAULT_LOOP_MAX);
threads[i].start();
}
// Wait all the threads to finish
for (Thread thread : threads) {
thread.join();
}
// Check if the quantity of unique UUIDs is correct
assertEquals(DUPLICATE_UUID_MSG, TestThread.hashSet.size(), (DEFAULT_LOOP_MAX * THREAD_TOTAL));
}
@Test
public void testGetMonotonicUlidInParallel() throws InterruptedException {
Thread[] threads = new Thread[THREAD_TOTAL];
TestThread.clearHashSet();
// Instantiate and start many threads
for (int i = 0; i < THREAD_TOTAL; i++) {
threads[i] = new TestThread(UlidCreator.getMonotonicCreator(), DEFAULT_LOOP_MAX);
threads[i].start();
}
@ -242,9 +107,10 @@ public class UlidSpecCreatorTest {
@Override
public void run() {
long timestamp = System.currentTimeMillis();
for (int i = 0; i < loopLimit; i++) {
synchronized (hashSet) {
hashSet.add(creator.create());
hashSet.add(creator.create(timestamp).toUuid());
}
}
}

18
src/test/java/com/github/f4b6a3/ulid/demo/DemoTest.java
View File

@ -10,20 +10,20 @@ public class DemoTest {
int max = 100;
System.out.println(HORIZONTAL_LINE);
System.out.println("### ULID string");
System.out.println(HORIZONTAL_LINE);
for (int i = 0; i < max; i++) {
System.out.println(UlidCreator.getUlidString());
}
System.out.println(HORIZONTAL_LINE);
System.out.println("### ULID-based GUID");
System.out.println("### ULID");
System.out.println(HORIZONTAL_LINE);
for (int i = 0; i < max; i++) {
System.out.println(UlidCreator.getUlid());
}
System.out.println(HORIZONTAL_LINE);
System.out.println("### Monotonic ULID");
System.out.println(HORIZONTAL_LINE);
for (int i = 0; i < max; i++) {
System.out.println(UlidCreator.getMonotonicUlid());
}
}
public static void main(String[] args) {

65
src/test/java/com/github/f4b6a3/ulid/ulid/UlidCreatorDefaultStringTest.java Normal file
View File

@ -0,0 +1,65 @@
package com.github.f4b6a3.ulid.ulid;
import org.junit.Test;
import com.github.f4b6a3.ulid.Ulid;
import com.github.f4b6a3.ulid.UlidCreator;
import com.github.f4b6a3.ulid.util.UlidValidator;
import static org.junit.Assert.*;
import java.util.HashSet;
public class UlidCreatorDefaultStringTest {
private static final int ULID_LENGTH = 26;
private static final int DEFAULT_LOOP_MAX = 100_000;
@Test
public void testGetUlid() {
String[] list = new String[DEFAULT_LOOP_MAX];
long startTime = System.currentTimeMillis();
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
list[i] = UlidCreator.getUlid().toString();
}
long endTime = System.currentTimeMillis();
checkNullOrInvalid(list);
checkUniqueness(list);
checkCreationTime(list, startTime, endTime);
}
private void checkNullOrInvalid(String[] list) {
for (String ulid : list) {
assertNotNull("ULID is null", ulid);
assertTrue("ULID is empty", !ulid.isEmpty());
assertEquals("ULID length is wrong", ULID_LENGTH, ulid.length());
assertTrue("ULID is not valid", UlidValidator.isValid(ulid));
}
}
private void checkUniqueness(String[] list) {
HashSet<String> set = new HashSet<>();
for (String ulid : list) {
assertTrue(String.format("ULID is duplicated %s", ulid), set.add(ulid));
}
assertEquals("There are duplicated ULIDs", set.size(), list.length);
}
private void checkCreationTime(String[] list, long startTime, long endTime) {
assertTrue("Start time was after end time", startTime <= endTime);
for (String ulid : list) {
long creationTime = Ulid.of(ulid).getTimestamp();
assertTrue("Creation time was before start time " + creationTime + " " + startTime,
creationTime >= startTime);
assertTrue("Creation time was after end time", creationTime <= endTime);
}
}
}

60
src/test/java/com/github/f4b6a3/ulid/ulid/UlidCreatorDefaultTest.java Normal file
View File

@ -0,0 +1,60 @@
package com.github.f4b6a3.ulid.ulid;
import org.junit.Test;
import com.github.f4b6a3.ulid.Ulid;
import com.github.f4b6a3.ulid.UlidCreator;
import static org.junit.Assert.*;
import java.util.HashSet;
public class UlidCreatorDefaultTest {
private static final int DEFAULT_LOOP_MAX = 100_000;
@Test
public void testGetUlid() {
Ulid[] list = new Ulid[DEFAULT_LOOP_MAX];
long startTime = System.currentTimeMillis();
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
list[i] = UlidCreator.getUlid();
}
long endTime = System.currentTimeMillis();
checkNullOrInvalid(list);
checkUniqueness(list);
checkCreationTime(list, startTime, endTime);
}
private void checkNullOrInvalid(Ulid[] list) {
for (Ulid ulid : list) {
assertNotNull("ULID is null", ulid);
}
}
private void checkUniqueness(Ulid[] list) {
HashSet<Ulid> set = new HashSet<>();
for (Ulid ulid : list) {
assertTrue(String.format("ULID is duplicated %s", ulid), set.add(ulid));
}
assertEquals("There are duplicated ULIDs", set.size(), list.length);
}
private void checkCreationTime(Ulid[] list, long startTime, long endTime) {
assertTrue("Start time was after end time", startTime <= endTime);
for (Ulid ulid : list) {
long creationTime = ulid.getTimestamp();
assertTrue("Creation time was before start time " + creationTime + " " + startTime,
creationTime >= startTime);
assertTrue("Creation time was after end time", creationTime <= endTime);
}
}
}

37
src/test/java/com/github/f4b6a3/ulid/ulid/UlidCreatorStringTest.java → src/test/java/com/github/f4b6a3/ulid/ulid/UlidCreatorMonotonicStringTest.java
View File

@ -2,17 +2,15 @@ package com.github.f4b6a3.ulid.ulid;
import org.junit.Test;
import com.github.f4b6a3.ulid.Ulid;
import com.github.f4b6a3.ulid.UlidCreator;
import com.github.f4b6a3.ulid.util.UlidConverter;
import com.github.f4b6a3.ulid.util.UlidUtil;
import com.github.f4b6a3.ulid.util.UlidValidator;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.HashSet;
import java.util.UUID;
public class UlidCreatorStringTest {
public class UlidCreatorMonotonicStringTest {
private static final int ULID_LENGTH = 26;
private static final int DEFAULT_LOOP_MAX = 100_000;
@ -24,7 +22,7 @@ public class UlidCreatorStringTest {
long startTime = System.currentTimeMillis();
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
list[i] = UlidCreator.getUlidString();
list[i] = UlidCreator.getMonotonicUlid().toString();
}
long endTime = System.currentTimeMillis();
@ -34,25 +32,6 @@ public class UlidCreatorStringTest {
checkOrdering(list);
checkCreationTime(list, startTime, endTime);
}
@Test
public void testGetUlid4() {
String[] list = new String[DEFAULT_LOOP_MAX];
long startTime = System.currentTimeMillis();
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
list[i] = UlidCreator.getUlidString4();
}
long endTime = System.currentTimeMillis();
checkNullOrInvalid(list);
checkUniqueness(list);
checkOrdering(list);
checkCreationTime(list, startTime, endTime);
checkVersion4(list);
}
private void checkNullOrInvalid(String[] list) {
for (String ulid : list) {
@ -79,7 +58,7 @@ public class UlidCreatorStringTest {
assertTrue("Start time was after end time", startTime <= endTime);
for (String ulid : list) {
long creationTime = UlidUtil.extractUnixMilliseconds(ulid);
long creationTime = Ulid.of(ulid).getTimestamp();
assertTrue("Creation time was before start time " + creationTime + " " + startTime,
creationTime >= startTime);
assertTrue("Creation time was after end time", creationTime <= endTime);
@ -94,12 +73,4 @@ public class UlidCreatorStringTest {
assertEquals("The ULID list is not ordered", list[i], other[i]);
}
}
private void checkVersion4(String[] list) {
for (String ulid : list) {
UUID uuid = UlidConverter.fromString(ulid);
assertEquals(String.format("ULID is is not RFC-4122 version 4 %s", uuid), 4, uuid.version());
assertEquals(String.format("ULID is is not RFC-4122 variant 2 %s", uuid), 2, uuid.variant());
}
}
}

71
src/test/java/com/github/f4b6a3/ulid/ulid/UlidCreatorMonotonicTest.java Normal file
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@ -0,0 +1,71 @@
package com.github.f4b6a3.ulid.ulid;
import org.junit.Test;
import com.github.f4b6a3.ulid.Ulid;
import com.github.f4b6a3.ulid.UlidCreator;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.HashSet;
public class UlidCreatorMonotonicTest {
private static final int DEFAULT_LOOP_MAX = 100_000;
@Test
public void testGetUlid() {
Ulid[] list = new Ulid[DEFAULT_LOOP_MAX];
long startTime = System.currentTimeMillis();
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
list[i] = UlidCreator.getMonotonicUlid();
}
long endTime = System.currentTimeMillis();
checkNullOrInvalid(list);
checkUniqueness(list);
checkOrdering(list);
checkCreationTime(list, startTime, endTime);
}
private void checkNullOrInvalid(Ulid[] list) {
for (Ulid ulid : list) {
assertNotNull("ULID is null", ulid);
}
}
private void checkUniqueness(Ulid[] list) {
HashSet<Ulid> set = new HashSet<>();
for (Ulid ulid : list) {
assertTrue(String.format("ULID is duplicated %s", ulid), set.add(ulid));
}
assertEquals("There are duplicated ULIDs", set.size(), list.length);
}
private void checkCreationTime(Ulid[] list, long startTime, long endTime) {
assertTrue("Start time was after end time", startTime <= endTime);
for (Ulid ulid : list) {
long creationTime = ulid.getTimestamp();
assertTrue("Creation time was before start time " + creationTime + " " + startTime,
creationTime >= startTime);
assertTrue("Creation time was after end time", creationTime <= endTime);
}
}
private void checkOrdering(Ulid[] list) {
Ulid[] other = Arrays.copyOf(list, list.length);
Arrays.sort(other);
for (int i = 0; i < list.length; i++) {
assertEquals("The ULID list is not ordered", list[i], other[i]);
}
}
}

98
src/test/java/com/github/f4b6a3/ulid/ulid/UlidCreatorUuidTest.java
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@ -1,98 +0,0 @@
package com.github.f4b6a3.ulid.ulid;
import org.junit.Test;
import com.github.f4b6a3.ulid.UlidCreator;
import com.github.f4b6a3.ulid.util.UlidUtil;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.HashSet;
import java.util.UUID;
public class UlidCreatorUuidTest {
private static final int DEFAULT_LOOP_MAX = 100_000;
@Test
public void testGetUlid() {
UUID[] list = new UUID[DEFAULT_LOOP_MAX];
long startTime = System.currentTimeMillis();
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
list[i] = UlidCreator.getUlid();
}
long endTime = System.currentTimeMillis();
checkNullOrInvalid(list);
checkUniqueness(list);
checkOrdering(list);
checkCreationTime(list, startTime, endTime);
}
@Test
public void testGetUlid4() {
UUID[] list = new UUID[DEFAULT_LOOP_MAX];
long startTime = System.currentTimeMillis();
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
list[i] = UlidCreator.getUlid4();
}
long endTime = System.currentTimeMillis();
checkNullOrInvalid(list);
checkUniqueness(list);
checkOrdering(list);
checkCreationTime(list, startTime, endTime);
checkVersion4(list);
}
private void checkNullOrInvalid(UUID[] list) {
for (UUID ulid : list) {
assertNotNull("ULID is null", ulid);
}
}
private void checkUniqueness(UUID[] list) {
HashSet<UUID> set = new HashSet<>();
for (UUID ulid : list) {
assertTrue(String.format("ULID is duplicated %s", ulid), set.add(ulid));
}
assertEquals("There are duplicated ULIDs", set.size(), list.length);
}
private void checkCreationTime(UUID[] list, long startTime, long endTime) {
assertTrue("Start time was after end time", startTime <= endTime);
for (UUID ulid : list) {
long creationTime = UlidUtil.extractUnixMilliseconds(ulid);
assertTrue("Creation time was before start time " + creationTime + " " + startTime,
creationTime >= startTime);
assertTrue("Creation time was after end time", creationTime <= endTime);
}
}
private void checkOrdering(UUID[] list) {
UUID[] other = Arrays.copyOf(list, list.length);
Arrays.sort(other);
for (int i = 0; i < list.length; i++) {
assertEquals("The ULID list is not ordered", list[i], other[i]);
}
}
private void checkVersion4(UUID[] list) {
for (UUID uuid : list) {
assertEquals(String.format("ULID is is not RFC-4122 version 4 %s", uuid), 4, uuid.version());
assertEquals(String.format("ULID is is not RFC-4122 variant 2 %s", uuid), 2, uuid.variant());
}
}
}

118
src/test/java/com/github/f4b6a3/ulid/util/UlidConverterTest.java
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@ -1,118 +0,0 @@
package com.github.f4b6a3.ulid.util;
import static org.junit.Assert.*;
import java.util.Random;
import java.util.UUID;
import org.junit.Test;
import com.github.f4b6a3.ulid.UlidCreator;
import com.github.f4b6a3.ulid.util.UlidConverter;
import com.github.f4b6a3.ulid.util.UlidValidator;
import com.github.f4b6a3.ulid.util.internal.UlidStruct;
public class UlidConverterTest {
private static final int ULID_LENGTH = 26;
private static final int DEFAULT_LOOP_MAX = 100_000;
@Test
public void testToAndFromUlid() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
UUID uuid1 = UlidCreator.getUlid();
String ulid = UlidConverter.toString(uuid1);
assertNotNull("ULID is null", ulid);
assertTrue("ULID is empty", !ulid.isEmpty());
assertEquals("ULID length is wrong ", ULID_LENGTH, ulid.length());
assertTrue("ULID is not valid", UlidValidator.isValid(ulid));
UUID uuid2 = UlidConverter.fromString(ulid);
assertEquals("Result ULID is different from original ULID", uuid1, uuid2);
}
}
@Test
public void testToString1() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
Random random = new Random();
final long time = random.nextLong();
final long random1 = random.nextLong();
final long random2 = random.nextLong();
UlidStruct struct0 = UlidStruct.of(time, random1, random2);
String string1 = struct0.toString();
UlidStruct struct1 = UlidStruct.of(string1);
assertEquals(struct0.time, struct1.time);
assertEquals(struct0.random1, struct1.random1);
assertEquals(struct0.random2, struct1.random2);
}
}
@Test
public void testToString2() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
UUID ulid0 = UlidCreator.getUlid();
UlidStruct struct0 = UlidStruct.of(ulid0);
String string1 = UlidConverter.toString(ulid0);
UlidStruct struct1 = UlidStruct.of(string1);
assertEquals(struct0.time, struct1.time);
assertEquals(struct0.random1, struct1.random1);
assertEquals(struct0.random2, struct1.random2);
}
}
@Test
public void testToString3() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
UUID ulid0 = UlidCreator.getUlid();
UlidStruct struct0 = UlidStruct.of(ulid0);
String string1 = struct0.toString();
UlidStruct struct1 = UlidStruct.of(string1);
assertEquals(struct0.time, struct1.time);
assertEquals(struct0.random1, struct1.random1);
assertEquals(struct0.random2, struct1.random2);
}
}
@Test
public void testToString4() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
UUID ulid0 = UlidCreator.getUlid();
UlidStruct struct0 = UlidStruct.of(ulid0);
String string1 = UlidConverter.toString(ulid0);
UlidStruct struct1 = UlidStruct.of(string1);
String string2 = struct0.toString();
UlidStruct struct2 = UlidStruct.of(string2);
assertEquals(string1, string2);
assertEquals(struct0.time, struct1.time);
assertEquals(struct0.random1, struct1.random1);
assertEquals(struct0.random2, struct1.random2);
assertEquals(struct0.time, struct2.time);
assertEquals(struct0.random1, struct2.random1);
assertEquals(struct0.random2, struct2.random2);
}
}
}

156
src/test/java/com/github/f4b6a3/ulid/util/UlidUtilTest.java
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@ -1,156 +0,0 @@
package com.github.f4b6a3.ulid.util;
import static org.junit.Assert.*;
import java.time.Instant;
import java.util.Random;
import org.junit.Test;
import com.github.f4b6a3.ulid.exception.InvalidUlidException;
import com.github.f4b6a3.ulid.util.internal.UlidStructTest;
import static com.github.f4b6a3.ulid.util.UlidUtil.*;
public class UlidUtilTest {
// Date: 10889-08-02T05:31:50.655Z: 281474976710655 (2^48-1)
private static final long TIMESTAMP_MAX = 0xffffffffffffL;
private static final long HALF_RANDOM_MAX = 0xffffffffffL;
private static final int DEFAULT_LOOP_MAX = 100_000;
private static final Random RANDOM = new Random();
@Test
public void testExtractTimestamp1() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
long time = RANDOM.nextLong() & TIMESTAMP_MAX;
long random1 = RANDOM.nextLong() & HALF_RANDOM_MAX;
long random2 = RANDOM.nextLong() & HALF_RANDOM_MAX;
String timeComponent = UlidStructTest.toTimeComponent(time);
String randomComponent = UlidStructTest.toRandomComponent(random1, random2);
String ulid = timeComponent + randomComponent;
long result = extractTimestamp(ulid);
assertEquals(time, result);
}
}
@Test
public void testExtractTimestamp2() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
String ulid;
String timeComponent;
String randomComponent;
long time;
long random1;
long random2;
time = RANDOM.nextLong() & TIMESTAMP_MAX;
random1 = RANDOM.nextLong() & HALF_RANDOM_MAX;
random2 = RANDOM.nextLong() & HALF_RANDOM_MAX;
timeComponent = UlidStructTest.toTimeComponent(time);
randomComponent = UlidStructTest.toRandomComponent(random1, random2);
timeComponent = "7ZZZZZZZZZ";
ulid = timeComponent + randomComponent;
time = extractTimestamp(ulid);
assertEquals(TIMESTAMP_MAX, time);
timeComponent = "0000000000";
ulid = timeComponent + randomComponent;
time = extractTimestamp(ulid);
assertEquals(0, time);
try {
// Test the first extra bit added by the base32 encoding
char[] chars = timeComponent.toCharArray();
chars[0] = 'G'; // GZZZZZZZZZ
timeComponent = new String(chars);
ulid = timeComponent + randomComponent;
extractTimestamp(ulid);
fail("Should throw an InvalidUlidException");
} catch (InvalidUlidException e) {
// success
}
try {
// Test the second extra bit added by the base32 encoding
char[] chars = timeComponent.toCharArray();
chars[0] = '8'; // 8ZZZZZZZZZ
timeComponent = new String(chars);
ulid = timeComponent + randomComponent;
extractTimestamp(ulid);
fail("Should throw an InvalidUlidException");
} catch (InvalidUlidException e) {
// success
}
}
}
@Test
public void testExtractUnixMilliseconds() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
long time = RANDOM.nextLong() & TIMESTAMP_MAX;
long random1 = RANDOM.nextLong() & HALF_RANDOM_MAX;
long random2 = RANDOM.nextLong() & HALF_RANDOM_MAX;
String ulid = UlidStructTest.toString(time, random1, random2);
long result = extractUnixMilliseconds(ulid);
assertEquals(time, result);
}
}
@Test
public void testExtractInstant() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
long time = RANDOM.nextLong() & TIMESTAMP_MAX;
Instant instant = Instant.ofEpochMilli(time);
long random1 = RANDOM.nextLong() & HALF_RANDOM_MAX;
long random2 = RANDOM.nextLong() & HALF_RANDOM_MAX;
String ulid = UlidStructTest.toString(time, random1, random2);
Instant result = extractInstant(ulid);
assertEquals(instant, result);
}
}
@Test
public void testExtractTimestampComponent() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
long time = RANDOM.nextLong() & TIMESTAMP_MAX;
long random1 = RANDOM.nextLong() & HALF_RANDOM_MAX;
long random2 = RANDOM.nextLong() & HALF_RANDOM_MAX;
String ulid = UlidStructTest.toString(time, random1, random2);
char[] chars = ulid.toCharArray();
char[] timeComponent = new char[10];
System.arraycopy(chars, 0, timeComponent, 0, 10);
String expected = new String(timeComponent);
String result = extractTimestampComponent(ulid);
assertEquals(expected, result);
}
}
@Test
public void testExtractRandomnessComponent() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
long time = RANDOM.nextLong() & TIMESTAMP_MAX;
long random1 = RANDOM.nextLong() & HALF_RANDOM_MAX;
long random2 = RANDOM.nextLong() & HALF_RANDOM_MAX;
String ulid = UlidStructTest.toString(time, random1, random2);
char[] chars = ulid.toCharArray();
char[] randomComponent = new char[16];
System.arraycopy(chars, 10, randomComponent, 0, 16);
String expected = new String(randomComponent);
String result = extractRandomnessComponent(ulid);
assertEquals(expected, result);
}
}
}

116
src/test/java/com/github/f4b6a3/ulid/util/internal/UlidStructTest.java → src/test/java/com/github/f4b6a3/ulid/util/internal/UlidTest.java
View File

@ -7,7 +7,9 @@ import java.util.UUID;
import org.junit.Test;
public class UlidStructTest {
import com.github.f4b6a3.ulid.Ulid;
public class UlidTest {
private static final int DEFAULT_LOOP_MAX = 100_000;
@ -19,43 +21,17 @@ public class UlidStructTest {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
UUID uuid0 = UUID.randomUUID();
String string0 = toString(uuid0);
String string1 = UlidStruct.of(string0).toString();
String string1 = Ulid.of(string0).toString();
assertEquals(string0, string1);
}
// Test RFC-4122 UUID version 4
final long versionMask = 0xffffffffffff0fffL;
final long variantMask = 0x3fffffffffffffffL;
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
UUID uuid0 = UUID.randomUUID();
String string0 = toString(uuid0);
String string1 = UlidStruct.of(string0).toString4(); // UUID v4 in base32
UUID uuid1 = toUuid(fromString(string1));
assertEquals(uuid0.getMostSignificantBits() & versionMask, uuid1.getMostSignificantBits() & versionMask);
assertEquals(uuid0.getLeastSignificantBits() & variantMask, uuid1.getLeastSignificantBits() & variantMask);
assertEquals(4, uuid1.version());
assertEquals(2, uuid1.variant());
}
}
@Test
public void testOfAndToUuid() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
UUID uuid0 = UUID.randomUUID();
UUID uuid1 = UlidStruct.of(uuid0).toUuid();
assertEquals(uuid0, uuid1);
}
// Test RFC-4122 UUID version 4
final long versionMask = 0xffffffffffff0fffL;
final long variantMask = 0x3fffffffffffffffL;
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
UUID uuid0 = UUID.randomUUID();
UUID uuid1 = UlidStruct.of(uuid0).toUuid4(); // UUID v4
assertEquals(uuid0.getMostSignificantBits() & versionMask, uuid1.getMostSignificantBits() & versionMask);
assertEquals(uuid0.getLeastSignificantBits() & variantMask, uuid1.getLeastSignificantBits() & variantMask);
assertEquals(4, uuid1.version());
assertEquals(2, uuid1.variant());
UUID uuid1 = Ulid.of(uuid0).toUuid();
assertEquals(uuid0.toString(), uuid1.toString());
}
}
@ -63,14 +39,12 @@ public class UlidStructTest {
public void testConstructorLongs() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
Random random = new Random();
final long time = random.nextLong();
final long random1 = random.nextLong();
final long random2 = random.nextLong();
UlidStruct struct0 = UlidStruct.of(time, random1, random2); // <-- under test
final long msb = random.nextLong();
final long lsb = random.nextLong();
Ulid ulid0 = Ulid.of(msb, lsb); // <-- under test
assertEquals(time & 0xffffffffffffL, struct0.time);
assertEquals(random1 & 0xffffffffffL, struct0.random1);
assertEquals(random2 & 0xffffffffffL, struct0.random2);
assertEquals(msb, ulid0.toUuid().getMostSignificantBits());
assertEquals(lsb, ulid0.toUuid().getLeastSignificantBits());
}
}
@ -78,14 +52,13 @@ public class UlidStructTest {
public void testConstructorString() {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
Random random = new Random();
final long time = random.nextLong();
final long random1 = random.nextLong();
final long random2 = random.nextLong();
UlidStruct struct0 = UlidStruct.of(time, random1, random2);
Ulid ulid0 = Ulid.of(random1, random2);
String string1 = toString(struct0);
UlidStruct struct1 = UlidStruct.of(string1); // <-- under test
assertEquals(struct0, struct1);
String string1 = toString(ulid0);
Ulid struct1 = Ulid.of(string1); // <-- under test
assertEquals(ulid0, struct1);
}
}
@ -96,7 +69,7 @@ public class UlidStructTest {
final long msb = random.nextLong();
final long lsb = random.nextLong();
final UUID uuid0 = new UUID(msb, lsb);
UlidStruct struct0 = UlidStruct.of(uuid0); // <-- under test
Ulid struct0 = Ulid.of(uuid0); // <-- under test
UUID uuid1 = toUuid(struct0);
assertEquals(uuid0, uuid1);
@ -108,13 +81,12 @@ public class UlidStructTest {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
Random random = new Random();
final long time = random.nextLong();
final long random1 = random.nextLong();
final long random2 = random.nextLong();
UlidStruct struct0 = UlidStruct.of(time, random1, random2);
Ulid ulid0 = Ulid.of(random1, random2);
String string1 = toString(struct0);
String string2 = struct0.toString(); // <-- under test
String string1 = toString(ulid0);
String string2 = ulid0.toString(); // <-- under test
assertEquals(string1, string2);
}
}
@ -124,18 +96,17 @@ public class UlidStructTest {
for (int i = 0; i < DEFAULT_LOOP_MAX; i++) {
Random random = new Random();
final long time = random.nextLong();
final long random1 = random.nextLong();
final long random2 = random.nextLong();
UlidStruct struct0 = UlidStruct.of(time, random1, random2);
Ulid ulid0 = Ulid.of(random1, random2);
UUID uuid1 = toUuid(struct0);
UUID uuid2 = struct0.toUuid(); // <-- under test
UUID uuid1 = toUuid(ulid0);
UUID uuid2 = ulid0.toUuid(); // <-- under test
assertEquals(uuid1, uuid2);
}
}
public static UlidStruct fromString(String string) {
public static Ulid fromString(String string) {
long time = 0;
long random1 = 0;
@ -153,17 +124,16 @@ public class UlidStructTest {
random1 = Long.parseUnsignedLong(r1, 32);
random2 = Long.parseUnsignedLong(r2, 32);
return UlidStruct.of(time, random1, random2);
long msb = (time << 16) | (random1 >>> 24);
long lsb = (random1 << 40) | (random2 & 0xffffffffffL);
return Ulid.of(msb, lsb);
}
public static UUID toUuid(UlidStruct struct) {
public static UUID toUuid(Ulid struct) {
long time = struct.time & 0xffffffffffffL;
long random1 = struct.random1 & 0xffffffffffL;
long random2 = struct.random2 & 0xffffffffffL;
final long msb = (time << 16) | (random1 >>> 24);
final long lsb = (random1 << 40) | random2;
long msb = struct.toUuid().getMostSignificantBits();
long lsb = struct.toUuid().getLeastSignificantBits();
return new UUID(msb, lsb);
}
@ -180,38 +150,36 @@ public class UlidStructTest {
return new UUID(msb, lsb);
}
public static String toString(UlidStruct struct) {
return toString(struct.time, struct.random1, struct.random2);
public static String toString(Ulid ulid) {
return toString(ulid.toUuid().getMostSignificantBits(), ulid.toUuid().getLeastSignificantBits());
}
public static String toString(UUID uuid) {
final long msb = uuid.getMostSignificantBits();
final long lsb = uuid.getLeastSignificantBits();
final long time = (msb >>> 16);
final long random1 = ((msb & 0xffffL) << 24) | (lsb >>> 40);
final long random2 = (lsb & 0xffffffffffL);
return toString(time, random1, random2);
return toString(msb, lsb);
}
public static String toString(final long time, final long random1, final long random2) {
String timeComponent = toTimeComponent(time);
String randomComponent = toRandomComponent(random1, random2);
public static String toString(final long msb, final long lsb) {
String timeComponent = toTimeComponent(msb >>> 16);
String randomComponent = toRandomComponent(msb, lsb);
return timeComponent + randomComponent;
}
public static String toTimeComponent(final long time) {
final String tzero = "0000000000";
String tm = Long.toUnsignedString(time, 32);
tm = tzero.substring(0, tzero.length() - tm.length()) + tm;
return transliterate(tm, ALPHABET_JAVA, ALPHABET_CROCKFORD);
}
public static String toRandomComponent(final long random1, final long random2) {
public static String toRandomComponent(final long msb, final long lsb) {
final String zeros = "00000000";
final long random1 = ((msb & 0xffffL) << 24) | (lsb >>> 40);
final long random2 = (lsb & 0xffffffffffL);
String r1 = Long.toUnsignedString(random1, 32);
String r2 = Long.toUnsignedString(random2, 32);