/*
 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/client/CredentialsProvider.java $
 * $Revision: 558124 $
 * $Date: 2007-07-20 13:36:47 -0700 (Fri, 20 Jul 2007) $
 *
 * ====================================================================
 *
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.http.client;

import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;

/**
 * Abstract credentials provider.
 * 
 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
 * 
 * @since 4.0
 */
public interface CredentialsProvider {

    /** 
     * Sets the {@link Credentials credentials} for the given authentication 
     * scope. Any previous credentials for the given scope will be overwritten.
     * 
     * @param authscope the {@link AuthScope authentication scope}
     * @param credentials the authentication {@link Credentials credentials} 
     * for the given scope.
     * 
     * @see #getCredentials(AuthScope)
     */
    void setCredentials(AuthScope authscope, Credentials credentials);

    /**
     * Get the {@link Credentials credentials} for the given authentication scope.
     *
     * @param authscope the {@link AuthScope authentication scope}
     * @return the credentials 
     * 
     * @see #setCredentials(AuthScope, Credentials)
     */
    Credentials getCredentials(AuthScope authscope);

    /**
     * Clears all credentials.
     */
    void clear();
    
}