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[simantics/platform.git] / bundles / org.simantics.compressions / src / org / simantics / compressions / impl / Channels.java
1 /*******************************************************************************\r
2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management\r
3  * in Industry THTH ry.\r
4  * All rights reserved. This program and the accompanying materials\r
5  * are made available under the terms of the Eclipse Public License v1.0\r
6  * which accompanies this distribution, and is available at\r
7  * http://www.eclipse.org/legal/epl-v10.html\r
8  *\r
9  * Contributors:\r
10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
11  *******************************************************************************/\r
12 package org.simantics.compressions.impl;\r
13 \r
14 import java.io.IOException;\r
15 import java.io.InputStream;\r
16 import java.nio.ByteBuffer;\r
17 import java.nio.channels.ReadableByteChannel;\r
18 \r
19 /**\r
20  * @author Tuukka Lehtonen\r
21  */\r
22 public class Channels {\r
23 \r
24     public static int read(ReadableByteChannel channel, ByteBuffer intoBuffer, int expectedBytes) throws IOException {\r
25         int read = 0;\r
26         while (read < expectedBytes) {\r
27             int ret = channel.read(intoBuffer);\r
28             if (ret < 0)\r
29                 return read; // End-Of-Stream\r
30             read += ret;\r
31         }\r
32         return read;\r
33     }\r
34 \r
35     public static int read(ReadableByteChannel channel, ByteBuffer intoBuffer) throws IOException {\r
36         return read(channel, intoBuffer, intoBuffer.limit());\r
37     }\r
38 \r
39     public static int readStream(InputStream stream, byte[] array, int expectedBytes) throws IOException {\r
40         int read = 0;\r
41         while (read < expectedBytes) {\r
42             int ret = stream.read(array, read, expectedBytes - read);\r
43             if (ret < 0)\r
44                 return read; // End-Of-Stream\r
45             read += ret;\r
46         }\r
47         return read;\r
48     }\r
49 \r
50 }