Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.databoard / src / org / simantics / databoard / util / NumberComparator.java

diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/util/NumberComparator.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/util/NumberComparator.java
new file mode 100644 (file)
index 0000000..d82b6c0
--- /dev/null
+++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/util/NumberComparator.java
@@ -0,0 +1,40 @@
+/*******************************************************************************\r
+ *  Copyright (c) 2010 Association for Decentralized Information Management in\r
+ *  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.databoard.util;
+
+import java.util.Comparator;\r
+
+public class NumberComparator implements Comparator<Number> {
+       
+       public static final NumberComparator INSTANCE = new NumberComparator();
+
+       @Override
+       public int compare(Number n1, Number n2) {
+               boolean integerCompare = 
+                       (n1 instanceof Float==false) && 
+                       (n1 instanceof Double==false) && 
+                       (n2 instanceof Float==false) && 
+                       (n2 instanceof Double==false); 
+               
+               if (integerCompare) {
+                       long v1 = n1.longValue();
+                       long v2 = n2.longValue();
+                       return (v1>v2 ? -1 : (v1==v2 ? 0 : 1));
+               } else {
+                       double v1 = n1.doubleValue();
+                       double v2 = n2.doubleValue();
+                       return (v1>v2 ? -1 : (v1==v2 ? 0 : 1));
+               }
+       }
+
+}
+