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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
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 *
 * This software consists of voluntary contributions made by many
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package org.apache.http.impl.client;

import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.client.UserTokenHandler;
import org.apache.http.protocol.HttpContext;

Noop implementation of UserTokenHandler that always returns null. 
Since:
4.3/**
 * Noop implementation of {@link UserTokenHandler} that always returns {@code null}.
 *
 * @since 4.3
 */
@Contract(threading = ThreadingBehavior.IMMUTABLE)
public class NoopUserTokenHandler implements UserTokenHandler {

    public static final NoopUserTokenHandler INSTANCE = new NoopUserTokenHandler();

    @Override
    public Object getUserToken(final HttpContext context) {
        return null;
    }

}