CredentialsExtractor (pac4j core 4.0.0-RC2 API)

All Known Implementing Classes:

BasicAuthExtractor, BearerAuthExtractor, FormExtractor, HeaderExtractor, ParameterExtractor
```
public interface CredentialsExtractor<C extends Credentials>
```
A credentials extractor.

Since:

1.8.0

Author:

Jerome Leleu

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Optional<C>`	`extract(WebContext context)`	Extract the `Credentials` from a `WebContext` and return `Optional.empty()` if no credentials are present or throw a `CredentialsException` if it cannot get it.

- Method Detail
  - extract
```
Optional<C> extract(WebContext context)
```
    Extract the Credentials from a WebContext and return Optional.empty() if no credentials are present or throw a CredentialsException if it cannot get it.
    
    Parameters:
    
    context - the current web context
    
    Returns:
    
    the credentials (optional)