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diff --git a/src/org/apache/http/client/CredentialsProvider.java b/src/org/apache/http/client/CredentialsProvider.java
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+/*
+ * $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();
+    
+}