http://www.jboss.org/undertow-parent/undertow-core: Undertow (JBoss by Red Hat) 
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 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
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 *  See the License for the specific language governing permissions and
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package io.undertow.security.idm;

import java.io.Serializable;


Representation of an external credential. This basically represents a trusted
3rd party, e.g. a front end server that has performed authentication.

Author:Stuart Douglas
/**
 * Representation of an external credential. This basically represents a trusted
 * 3rd party, e.g. a front end server that has performed authentication.
 *
 * @author Stuart Douglas
 */
public class ExternalCredential implements Serializable, Credential {

    public static final ExternalCredential INSTANCE = new ExternalCredential();

    private ExternalCredential() {

    }

}