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WebDAV server implementations for JCR

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/*
 * 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.
 */
package org.apache.jackrabbit.server;

import javax.jcr.Credentials;
import javax.jcr.LoginException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;

/**
 * This Interface defines a provider for the credentials.
 */
public interface CredentialsProvider {

    /**
     * Extracts the credentials from the given servlet request.
     *
     * @param request
     * @return the credentials or null
     * @throws LoginException if the credentials are invalid
     * @throws ServletException if an error occurrs
     */
    public Credentials getCredentials(HttpServletRequest request)
            throws LoginException, ServletException;
}