1 /*
2 * Copyright 2011-2012 smartics, Kronseder & Reiner GmbH
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package de.smartics.util.io;
17
18 import java.io.IOException;
19 import java.io.InputStream;
20 import java.io.OutputStream;
21
22 /**
23 * Provides access to streams to read from and write to a destination. This is a
24 * simple method to abstract access to the file system.
25 */
26 public interface StreamHandler
27 {
28 // ********************************* Fields *********************************
29
30 // --- constants ------------------------------------------------------------
31
32 // ****************************** Initializer *******************************
33
34 // ****************************** Inner Classes *****************************
35
36 // ********************************* Methods ********************************
37
38 // --- get&set --------------------------------------------------------------
39
40 // --- business -------------------------------------------------------------
41
42 /**
43 * Opens a stream to the given resource for reading.
44 *
45 * @param resourceId the identifier of the resource that should be opened.
46 * @return the stream to the resource.
47 * @throws IOException on any problem opening the resource.
48 */
49 InputStream openToRead(String resourceId) throws IOException;
50
51 /**
52 * Opens a stream to the given resource for writing.
53 *
54 * @param resourceId the identifier of the resource that should be opened.
55 * @return the stream to the resource.
56 * @throws IOException on any problem opening the resource.
57 */
58 OutputStream openToWrite(String resourceId) throws IOException;
59
60 // --- object basics --------------------------------------------------------
61
62 }