RoleDecoder (WildFly Elytron Parent 1.10.12.Final API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface RoleDecoder
```
A decoder to extract role information from an identity's attributes.

Author:

David M. Lloyd

Field Summary

Fields
Modifier and Type	Field	Description
`static RoleDecoder`	`DEFAULT`	A role decoder which always decodes roles from the attribute called "Roles".
`static RoleDecoder`	`EMPTY`	A role decoder which decodes no roles.
`static String`	`KEY_ROLES`	A key whose value is the string "Roles", to provide a standard/default location at which roles may be found.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Roles`	`decodeRoles(AuthorizationIdentity authorizationIdentity)`	Decode the role set from the given authorization identity.
`static RoleDecoder`	`simple(String attribute)`	Create a simple role decoder which returns the values of the given attribute.

- Field Detail
  - KEY_ROLES
```
static final String KEY_ROLES
```
    A key whose value is the string "Roles", to provide a standard/default location at which roles may be found.
    
    See Also:
    
    Constant Field Values
  - EMPTY
```
static final RoleDecoder EMPTY
```
    A role decoder which decodes no roles.
  - DEFAULT
```
static final RoleDecoder DEFAULT
```
    A role decoder which always decodes roles from the attribute called "Roles".
- Method Detail
  - decodeRoles
```
Roles decodeRoles(AuthorizationIdentity authorizationIdentity)
```
    Decode the role set from the given authorization identity.
    
    Parameters:
    
    authorizationIdentity - the authorization identity (not null)
    
    Returns:
    
    the role set (must not be null)
  - simple
```
static RoleDecoder simple(String attribute)
```
    Create a simple role decoder which returns the values of the given attribute.
    
    Parameters:
    
    attribute - the attribute
    
    Returns:
    
    the roles