IAuthCredentialToSubjectResolverSPI (ph-security 11.0.6 API)

```
@IsSPIInterface
public interface IAuthCredentialToSubjectResolverSPI
```
This interface needs to be implemented by all classes that are used for resolving credentials to a certain subject.

Author:

Philip Helger

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`IAuthSubject`	`getSubjectFromCredentials(IAuthCredentials aCredentials)`	This method is only called if `supportsCredentials(IAuthCredentials)` returned `true`.
`boolean`	`supportsCredentials(IAuthCredentials aCredentials)`	Check if this class can handle the passed credential implementation.

- Method Detail
  - supportsCredentials
```
boolean supportsCredentials(@Nonnull
                            IAuthCredentials aCredentials)
```
    Check if this class can handle the passed credential implementation.
    
    Parameters:
    
    aCredentials - The credentials to be validated. Never null.
    
    Returns:
    
    true if this class can handle the given credentials, false otherwise.
  - getSubjectFromCredentials
```
@Nullable
IAuthSubject getSubjectFromCredentials(@Nonnull
                                       IAuthCredentials aCredentials)
```
    This method is only called if supportsCredentials(IAuthCredentials) returned true. It should try to resolve the credentials to an IAuthSubject. If resolving fails, no exception should be thrown, but null should be returned.
    
    Parameters:
    
    aCredentials - The credentials to be resolved to a subject. Never null .
    
    Returns:
    
    null if the credentials could not be resolved, the subject otherwise.