UUIDUtil (Java UUID Generator 4.2.0 API)

java.lang.Object
- com.fasterxml.uuid.impl.UUIDUtil

```
public class UUIDUtil
extends Object
```

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`BYTE_OFFSET_CLOCK_HI`
`static int`	`BYTE_OFFSET_CLOCK_LO`
`static int`	`BYTE_OFFSET_CLOCK_MID`
`static int`	`BYTE_OFFSET_CLOCK_SEQUENCE`
`static int`	`BYTE_OFFSET_TYPE`
`static int`	`BYTE_OFFSET_VARIATION`

Constructor Summary

Constructors
Constructor and Description

UUIDUtil()

Constructors
Constructor and Description
`UUIDUtil()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static byte[]`	`asByteArray(UUID uuid)`
`static UUID`	`constructUUID(UUIDType type, byte[] uuidBytes)` Helper method for constructing UUID instances with appropriate type
`static UUID`	`constructUUID(UUIDType type, long l1, long l2)`
`protected static long`	`gatherLong(byte[] buffer, int offset)`
`static long`	`initUUIDFirstLong(long l1, int rawType)`
`static long`	`initUUIDFirstLong(long l1, UUIDType type)`
`static long`	`initUUIDSecondLong(long l2)`
`static UUID`	`maxUUID()` Accessor for so-call "Max UUID" (see UUID 6 draft; one that is all one bits
`static UUID`	`nilUUID()` Accessor for so-call "Nil UUID" (see RFC 4122/4.1.7; one that is all zeroes.
`static void`	`toByteArray(UUID uuid, byte[] buffer)`
`static void`	`toByteArray(UUID uuid, byte[] buffer, int offset)`
`static UUIDType`	`typeOf(UUID uuid)` Method for determining which type of UUID given UUID is.
`static UUID`	`uuid(byte[] bytes)` Factory method for constructing `UUID` instance from given 16 bytes.
`static UUID`	`uuid(byte[] bytes, int offset)` Factory method for constructing `UUID` instance from given 16 bytes.
`static UUID`	`uuid(String id)` Factory method for creating UUIDs from the canonical string representation.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - BYTE_OFFSET_CLOCK_LO
```
public static final int BYTE_OFFSET_CLOCK_LO
```
    See Also:
    
    Constant Field Values
  - BYTE_OFFSET_CLOCK_MID
```
public static final int BYTE_OFFSET_CLOCK_MID
```
    See Also:
    
    Constant Field Values
  - BYTE_OFFSET_CLOCK_HI
```
public static final int BYTE_OFFSET_CLOCK_HI
```
    See Also:
    
    Constant Field Values
  - BYTE_OFFSET_TYPE
```
public static final int BYTE_OFFSET_TYPE
```
    See Also:
    
    Constant Field Values
  - BYTE_OFFSET_CLOCK_SEQUENCE
```
public static final int BYTE_OFFSET_CLOCK_SEQUENCE
```
    See Also:
    
    Constant Field Values
  - BYTE_OFFSET_VARIATION
```
public static final int BYTE_OFFSET_VARIATION
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - UUIDUtil
```
public UUIDUtil()
```
- Method Detail
  - nilUUID
```
public static UUID nilUUID()
```
    Accessor for so-call "Nil UUID" (see RFC 4122/4.1.7; one that is all zeroes.
    
    Returns:
    
    "Nil" UUID instance
    
    Since:
    
    4.1
  - maxUUID
```
public static UUID maxUUID()
```
    Accessor for so-call "Max UUID" (see UUID 6 draft; one that is all one bits
    
    Returns:
    
    "Nil" UUID instance
    
    Since:
    
    4.1
  - uuid
```
public static UUID uuid(String id)
```
    Factory method for creating UUIDs from the canonical string representation.
    
    Parameters:
    
    id - String that contains the canonical representation of the UUID to build; 36-char string (see UUID specs for details). Hex-chars may be in upper-case too; UUID class will always output them in lowercase.
  - uuid
```
public static UUID uuid(byte[] bytes)
```
    Factory method for constructing UUID instance from given 16 bytes. NOTE: since absolutely no validation is done for contents, this method should only be used if contents are known to be valid.
  - uuid
```
public static UUID uuid(byte[] bytes,
                        int offset)
```
    Factory method for constructing UUID instance from given 16 bytes. NOTE: since absolutely no validation is done for contents, this method should only be used if contents are known to be valid.
    
    Parameters:
    
    bytes - Array that contains sequence of 16 bytes that contain a valid UUID
    
    offset - Offset of the first of 16 bytes
  - constructUUID
```
public static UUID constructUUID(UUIDType type,
                                 byte[] uuidBytes)
```
    Helper method for constructing UUID instances with appropriate type
  - constructUUID
```
public static UUID constructUUID(UUIDType type,
                                 long l1,
                                 long l2)
```
  - initUUIDFirstLong
```
public static long initUUIDFirstLong(long l1,
                                     UUIDType type)
```
  - initUUIDFirstLong
```
public static long initUUIDFirstLong(long l1,
                                     int rawType)
```
  - initUUIDSecondLong
```
public static long initUUIDSecondLong(long l2)
```
  - typeOf
```
public static UUIDType typeOf(UUID uuid)
```
    Method for determining which type of UUID given UUID is. Returns null if type can not be determined.
    
    Parameters:
    
    uuid - UUID to check
    
    Returns:
    
    Null if UUID is null or type can not be determined (== invalid UUID); otherwise type
  - asByteArray
```
public static byte[] asByteArray(UUID uuid)
```
  - toByteArray
```
public static void toByteArray(UUID uuid,
                               byte[] buffer)
```
  - toByteArray
```
public static void toByteArray(UUID uuid,
                               byte[] buffer,
                               int offset)
```
  - gatherLong
```
protected static final long gatherLong(byte[] buffer,
                                       int offset)
```

Class UUIDUtil

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

BYTE_OFFSET_CLOCK_LO

BYTE_OFFSET_CLOCK_MID

BYTE_OFFSET_CLOCK_HI

BYTE_OFFSET_TYPE

BYTE_OFFSET_CLOCK_SEQUENCE

BYTE_OFFSET_VARIATION

Constructor Detail

UUIDUtil

Method Detail

nilUUID

maxUUID

uuid

uuid

uuid

constructUUID

constructUUID

initUUIDFirstLong

initUUIDFirstLong

initUUIDSecondLong

typeOf

asByteArray

toByteArray

toByteArray

gatherLong