X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.compressions%2Fsrc%2Forg%2Fsimantics%2Fcompressions%2Fimpl%2FBuffers.java;fp=bundles%2Forg.simantics.compressions%2Fsrc%2Forg%2Fsimantics%2Fcompressions%2Fimpl%2FBuffers.java;h=feac5206c6cdd29f0485a6de23077a3a8de87deb;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

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
index 000000000..feac5206c
--- /dev/null
+++ b/bundles/org.simantics.compressions/src/org/simantics/compressions/impl/Buffers.java
@@ -0,0 +1,43 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2012 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.compressions.impl;
+
+import java.nio.ByteBuffer;
+
+/**
+ * @author Tuukka Lehtonen
+ */
+public class Buffers {
+
+	public static byte[] getInputArray(ByteBuffer buffer) {
+		if (buffer.hasArray())
+			return buffer.array();
+		// Poor performance fallback involving copying.
+		byte[] copy = new byte[buffer.remaining()];
+		buffer.get(copy);
+		return copy;
+	}
+
+	public static byte[] getOutputArray(ByteBuffer buffer) {
+		return buffer.hasArray() ? buffer.array() : new byte[buffer.remaining()];
+	}
+
+	public static void writeOutput(ByteBuffer buffer, byte[] array) {
+		if (buffer.hasArray() && buffer.array() == array)
+			return;
+		// Poor performance fallback involving copying.
+		int pos = buffer.position();
+		buffer.put(array);
+		buffer.position(pos);
+	}
+
+}