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[simantics/platform.git] / bundles / org.simantics.compressions / src / org / simantics / compressions / impl / Buffers.java
1 /*******************************************************************************\r
2  * Copyright (c) 2007, 2012 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.nio.ByteBuffer;\r
15 \r
16 /**\r
17  * @author Tuukka Lehtonen\r
18  */\r
19 public class Buffers {\r
20 \r
21         public static byte[] getInputArray(ByteBuffer buffer) {\r
22                 if (buffer.hasArray())\r
23                         return buffer.array();\r
24                 // Poor performance fallback involving copying.\r
25                 byte[] copy = new byte[buffer.remaining()];\r
26                 buffer.get(copy);\r
27                 return copy;\r
28         }\r
29 \r
30         public static byte[] getOutputArray(ByteBuffer buffer) {\r
31                 return buffer.hasArray() ? buffer.array() : new byte[buffer.remaining()];\r
32         }\r
33 \r
34         public static void writeOutput(ByteBuffer buffer, byte[] array) {\r
35                 if (buffer.hasArray() && buffer.array() == array)\r
36                         return;\r
37                 // Poor performance fallback involving copying.\r
38                 int pos = buffer.position();\r
39                 buffer.put(array);\r
40                 buffer.position(pos);\r
41         }\r
42 \r
43 }\r