EvidenceDecoder (WildFly Elytron Parent 1.10.12.Final API)

All Superinterfaces:

Function<Evidence,Principal>

All Known Implementing Classes:

X500SubjectEvidenceDecoder, X509SubjectAltNameEvidenceDecoder

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 EvidenceDecoder
extends Function<Evidence,Principal>
```
A decoder for extracting a principal from evidence.

Since:

1.10.0

Author:

Farah Juma

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`static EvidenceDecoder`	`aggregate(EvidenceDecoder... decoders)`	Create an aggregated evidence decoder.
`default Principal`	`apply(Evidence evidence)`
`Principal`	`getPrincipal(Evidence evidence)`	Get the principal from the given evidence.

Methods inherited from interface java.util.function.Function
andThen, compose

- Method Detail
  - getPrincipal
```
Principal getPrincipal(Evidence evidence)
```
    Get the principal from the given evidence. If this decoder does not understand the given evidence, null is returned.
    
    Parameters:
    
    evidence - the evidence to decode
    
    Returns:
    
    the principal, or null if this decoder does not understand the evidence
  - apply
```
default Principal apply(Evidence evidence)
```
    Specified by:
    
    apply in interface Function<Evidence,Principal>
  - aggregate
```
static EvidenceDecoder aggregate(EvidenceDecoder... decoders)
```
    Create an aggregated evidence decoder. The aggregated decoder will try each evidence decoder until one returns a non-null value. If all the evidence decoders return null, then null will be returned.
    
    Parameters:
    
    decoders - the constituent decoders
    
    Returns:
    
    the aggregated decoder