protected String getAuthorization(Request request, Map info, URL serverUrl, URL protectionSpaceUrl, URL proxyServerUrl) {
        Assert.isNotNull(request);
        Assert.isNotNull(info);
        Assert.isNotNull(serverUrl);
        Assert.isNotNull(protectionSpaceUrl);
        return null;
    }
protected String getAuthorization(Request request, Map info, URL serverUrl, URL protectionSpaceUrl, URL proxyServerUrl) {
        Assert.isNotNull(request);
        Assert.isNotNull(info);
        Assert.isNotNull(serverUrl);
        Assert.isNotNull(protectionSpaceUrl);
        return null;
    }
protected String getAuthorization ( Request request , Map info , URL serverUrl , URL protectionSpaceUrl , URL proxyServerUrl ) { Assert . isNotNull ( request ) ; Assert . isNotNull ( info ) ; Assert . isNotNull ( serverUrl ) ; Assert . isNotNull ( protectionSpaceUrl ) ; return null ; }
Returns the authorization credentials for the given request. The
authorization credentials are derived from the given authentication
info. The authentication info may contain directives such as usernames
and passwords.
<p>This method should be overridden by schema specific authenticators.

@param request the request being authorized
@param info the authentication information used to derive the
authorization credentials
@param serverUrl the URL of the server
@param protectionSpaceUrl the URL of the protected resource
@param proxyServerUrl the URL of the proxy server, or <code>null</code>
if there is none
@return the authorization credentials for the given request
Returns the authorization credentials for the given request . The authorization credentials are derived from the given authentication info . The authentication info may contain directives such as usernames and passwords . <p > This method should be overridden by schema specific authenticators .