ProxyHandler (cas-server-core-api-ticket 6.5.5 API)

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 ProxyHandler
```
Abstraction for what needs to be done to handle proxies. Useful because the generic flow for all authentication is similar the actions taken for proxying are different. One can swap in/out implementations but keep the flow of events the same.

Since:

3.0.0

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default boolean`	`canHandle(org.apereo.cas.authentication.Credential credential)`	Whether this handler can support the proxy request identified by the given credentials.
`java.lang.String`	`handle(org.apereo.cas.authentication.Credential credential, TicketGrantingTicket proxyGrantingTicketId)`	Method to actually process the proxy request.

- Method Detail
  - handle
```
java.lang.String handle(org.apereo.cas.authentication.Credential credential,
                        TicketGrantingTicket proxyGrantingTicketId)
```
    Method to actually process the proxy request.
    
    Parameters:
    
    credential - The credential of the item that will be proxying.
    
    proxyGrantingTicketId - The ticketId for the PGT (which really is a TGT)
    
    Returns:
    
    the String value that needs to be passed to the CAS client.
  - canHandle
```
default boolean canHandle(org.apereo.cas.authentication.Credential credential)
```
    Whether this handler can support the proxy request identified by the given credentials.
    
    Parameters:
    
    credential - the credential object containing the proxy request details.
    
    Returns:
    
    true, if successful