if (context != null) {
final Set<Identity> identities = context.getSubjectInfo().getIdentities();
if (identities.isEmpty()) {
ncb.setName(DOLLAR_LOCAL);
} else {
final Identity identity = identities.iterator().next();
ncb.setName(identity.getName());
}
} else {
ncb.setName(DOLLAR_LOCAL);
}
} else if (current instanceof PasswordCallback) {
if (context != null) {
final PasswordCallback pcb = (PasswordCallback) current;
final Set<Identity> identities = context.getSubjectInfo().getIdentities();
if (identities.isEmpty()) {
throw new UnsupportedCallbackException(current);
} else {
final Identity identity = identities.iterator().next();
if (identity instanceof CredentialIdentity) {
pcb.setPassword((char[]) ((CredentialIdentity) identity).getCredential());
} else {
throw new UnsupportedCallbackException(current);
}