001/*
002 * ====================================================================
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *   http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied.  See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 * ====================================================================
020 *
021 * This software consists of voluntary contributions made by many
022 * individuals on behalf of the Apache Software Foundation.  For more
023 * information on the Apache Software Foundation, please see
024 * <http://www.apache.org/>.
025 *
026 */
027package org.apache.http.impl.client;
028
029import org.apache.http.annotation.Contract;
030import org.apache.http.annotation.ThreadingBehavior;
031import org.apache.http.client.UserTokenHandler;
032import org.apache.http.protocol.HttpContext;
033
034/**
035 * Noop implementation of {@link UserTokenHandler} that always returns {@code null}.
036 *
037 * @since 4.3
038 */
039@Contract(threading = ThreadingBehavior.IMMUTABLE)
040public class NoopUserTokenHandler implements UserTokenHandler {
041
042    public static final NoopUserTokenHandler INSTANCE = new NoopUserTokenHandler();
043
044    @Override
045    public Object getUserToken(final HttpContext context) {
046        return null;
047    }
048
049}