}
else if (callback instanceof CredentialValidationCallback)
{
CredentialValidationCallback credentialValidationCallback = (CredentialValidationCallback) callback;
Subject subject = credentialValidationCallback.getSubject();
LoginCallback loginCallback = new LoginCallbackImpl(subject,
credentialValidationCallback.getUsername(),
credentialValidationCallback.getCredential());
UserIdentity user = _loginService.login(credentialValidationCallback.getUsername(),credentialValidationCallback.getCredential());
if (user!=null)
{
loginCallback.setUserPrincipal(user.getUserPrincipal());
credentialValidationCallback.getSubject().getPrivateCredentials().add(loginCallback);
credentialValidationCallback.setResult(true);
credentialValidationCallback.getSubject().getPrincipals().addAll(user.getSubject().getPrincipals());
credentialValidationCallback.getSubject().getPrivateCredentials().add(user);
}