package org.apache.maven.index.updater;

 /*

  * 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.

  */

 import java.io.FileNotFoundException;

 import java.io.IOException;

 import java.io.InputStream;

 /**

  * An interface defining resource downloading contract

  * 

  * @author Eugene Kuleshov

  */

 public interface ResourceFetcher

 {

     /**

      * Connect and start transfer session

      */

     void connect( String id, String url )

         throws IOException;

     /**

      * Disconnect and complete transfer session

      */

     void disconnect()

         throws IOException;

     /**

      * Retrieves resource as InputStream

      * 

      * @param name a name of resource to retrieve

      */

     InputStream retrieve( String name )

         throws IOException, FileNotFoundException;

 }