UUID (Red Hat JBoss Enterprise Application Platform 8.0.0.GA public API)

```
@Documented
@Constraint(validatedBy={})
@Target({METHOD,FIELD,ANNOTATION_TYPE,CONSTRUCTOR,PARAMETER,TYPE_USE})
@Retention(RUNTIME)
@Repeatable(List.class)
public @interface UUID
```
Checks that the annotated character sequence is a valid UUID.
Validation characteristics:
- Consists only of numbers, hex characters and dashes
- Has exact length of 36 characters
- Number of hex digits in every group (8-4-4-4-12)
- Nil UUID (default: allowed)
- Allowed UUID versions (default: 1 to 5)
- Allowed UUID variants (default: 0 to 2)
- Letter case (default: lower case)
The supported type is CharSequence. null is considered valid.
Since:

8.0.0

Author:

Daniel Heid

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`boolean`	`allowEmpty`
`boolean`	`allowNil`
`Class<?>[]`	`groups`
`UUID.LetterCase`	`letterCase`
`String`	`message`
`Class<? extends Payload>[]`	`payload`
`int[]`	`variant`	Must not be lower than variant 0
`int[]`	`version`	Must not be lower than version 1

- Element Detail
  - message
```
String message
```
    Default:
    
    "{org.hibernate.validator.constraints.UUID.message}"
- - groups
```
Class<?>[] groups
```
    Default:
    
    {}
- - payload
```
Class<? extends Payload>[] payload
```
    Default:
    
    {}
- - allowEmpty
```
boolean allowEmpty
```
    Returns:
    
    allow empty strings. Per default does not allow empty strings
    
    Default:
    
    false
- - allowNil
```
boolean allowNil
```
    Returns:
    
    true if nil UUIDs 00000000-0000-0000-0000-000000000000 are valid Per default nil UUIDs are valid
    
    Default:
    
    true
- - version
```
int[] version
```
    Must not be lower than version 1
    
    Returns:
    
    the accepted UUID version numbers Per default versions 1 to 5 are allowed
    
    Default:
    
    {1, 2, 3, 4, 5}
- - variant
```
int[] variant
```
    Must not be lower than variant 0
    
    Returns:
    
    the allowed UUID variant numbers Per default variants 0 to 2 are allowed
    
    Default:
    
    {0, 1, 2}
- - letterCase
```
UUID.LetterCase letterCase
```
    Returns:
    
    the required letter case Per default only lower case is valid
    
    See Also:
    
    UUID.LetterCase
    
    Default:
    
    org.hibernate.validator.constraints.UUID.LetterCase.LOWER_CASE