PrincipalNameFilter (Apache Sling Jackrabbit UserManager Support 2.2.18 API)

```
public interface PrincipalNameFilter
```
Service interface which allows for filtering what characters are allowed in a generated principal name

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`filter(String principalName)`	Filter the invalid characters out of the provided principal name candidate

- Method Detail
  - filter
```
String filter(String principalName)
```
    Filter the invalid characters out of the provided principal name candidate
    
    Parameters:
    
    principalName - the candidate principal name
    
    Returns:
    
    the filtered value