httpclient/src/main/java/org/apache/http/auth/ContextAwareAuthScheme.java

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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
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 * Unless required by applicable law or agreed to in writing,
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 * KIND, either express or implied.  See the License for the
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 * under the License.
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 *
 * This software consists of voluntary contributions made by many
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package org.apache.http.auth;

import org.apache.http.Header;
import org.apache.http.HttpRequest;
import org.apache.http.protocol.HttpContext;

/**
 * This interface represents an extended  authentication scheme
 * that requires access to {@link HttpContext} in order to
 * generate an authorization string.
 *
 * TODO: Fix AuthScheme interface in the next major version
 *
 * @since 4.1
 */

public interface ContextAwareAuthScheme extends AuthScheme {

    /**
     * Produces an authorization string for the given set of
     * {@link Credentials}.
     *
     * @param credentials The set of credentials to be used for athentication
     * @param request The request being authenticated
     * @param context HTTP context
     * @throws AuthenticationException if authorization string cannot
     *   be generated due to an authentication failure
     *
     * @return the authorization string
     */
    Header authenticate(
            Credentials credentials,
            HttpRequest request,
            HttpContext context) throws AuthenticationException;

}