Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.compressions / src / org / simantics / compressions / impl / Buffers.java

diff --git a/bundles/org.simantics.compressions/src/org/simantics/compressions/impl/Buffers.java b/bundles/org.simantics.compressions/src/org/simantics/compressions/impl/Buffers.java
new file mode 100644 (file)
index 0000000..feac520
--- /dev/null
+++ b/bundles/org.simantics.compressions/src/org/simantics/compressions/impl/Buffers.java
@@ -0,0 +1,43 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.compressions.impl;\r
+\r
+import java.nio.ByteBuffer;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class Buffers {\r
+\r
+       public static byte[] getInputArray(ByteBuffer buffer) {\r
+               if (buffer.hasArray())\r
+                       return buffer.array();\r
+               // Poor performance fallback involving copying.\r
+               byte[] copy = new byte[buffer.remaining()];\r
+               buffer.get(copy);\r
+               return copy;\r
+       }\r
+\r
+       public static byte[] getOutputArray(ByteBuffer buffer) {\r
+               return buffer.hasArray() ? buffer.array() : new byte[buffer.remaining()];\r
+       }\r
+\r
+       public static void writeOutput(ByteBuffer buffer, byte[] array) {\r
+               if (buffer.hasArray() && buffer.array() == array)\r
+                       return;\r
+               // Poor performance fallback involving copying.\r
+               int pos = buffer.position();\r
+               buffer.put(array);\r
+               buffer.position(pos);\r
+       }\r
+\r
+}\r