PrincipalExtractor (Spring Boot API)

All Known Implementing Classes:
FixedPrincipalExtractor
```
public interface PrincipalExtractor
```
Strategy used by UserInfoTokenServices to extract the principal from the resource server's response.
Since:
1.4.0

- Method Summary
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  Object extractPrincipal(Map<String,Object> map)
  Extract the principal that should be used for the token.

- Method Detail
  - extractPrincipal
```
Object extractPrincipal(Map<String,Object> map)
```
    Extract the principal that should be used for the token.
    Parameters:
    map - the source map
    Returns:
    the extracted principal or null