1 package org.apache.maven.index.updater;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.io.FileNotFoundException;
23 import java.io.IOException;
24 import java.io.InputStream;
25
26 /**
27 * An interface defining resource downloading contract
28 *
29 * @author Eugene Kuleshov
30 */
31 public interface ResourceFetcher
32 {
33 /**
34 * Connect and start transfer session
35 */
36 void connect( String id, String url )
37 throws IOException;
38
39 /**
40 * Disconnect and complete transfer session
41 */
42 void disconnect()
43 throws IOException;
44
45 /**
46 * Retrieves resource as InputStream
47 *
48 * @param name a name of resource to retrieve
49 */
50 InputStream retrieve( String name )
51 throws IOException, FileNotFoundException;
52 }