Pattern (Jakarta EE Platform API)

```
@Target({METHOD,FIELD,ANNOTATION_TYPE,CONSTRUCTOR,PARAMETER,TYPE_USE})
@Retention(RUNTIME)
@Repeatable(List.class)
@Documented
@Constraint(validatedBy={})
public @interface Pattern
```
The annotated CharSequence must match the specified regular expression. The regular expression follows the Java regular expression conventions see Pattern.
Accepts CharSequence. null elements are considered valid.

Author:

Emmanuel Bernard

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  String regexp
- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  Pattern.Flag[] flags
  
  Class<?>[] groups
  
  String message
  
  Class<? extends Payload>[] payload

- Element Detail
  - regexp
```
String regexp
```
    Returns:
    
    the regular expression to match
- - flags
```
Pattern.Flag[] flags
```
    Returns:
    
    array of Flags considered when resolving the regular expression
    
    Default:
    
    {}
- - message
```
String message
```
    Returns:
    
    the error message template
    
    Default:
    
    "{jakarta.validation.constraints.Pattern.message}"
- - groups
```
Class<?>[] groups
```
    Returns:
    
    the groups the constraint belongs to
    
    Default:
    
    {}
- - payload
```
Class<? extends Payload>[] payload
```
    Returns:
    
    the payload associated to the constraint
    
    Default:
    
    {}