rrd4j: Merge in upstream changes part 5

add file missing from previous checkin

apps/jrobin/java/src/org/rrd4j/graph/FindUnit.java

@@ -0,0 +1,25 @@
+package org.rrd4j.graph;
+
+class FindUnit {
+
+    private static final char UNIT_UNKNOWN = '?';
+    private static final char[] UNIT_SYMBOLS = {'y', 'z', 'a', 'f', 'p', 'n', 'µ', 'm', ' ', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'};
+    private static final int SYMBOLS_CENTER = 8;
+
+    private FindUnit() {
+
+    }
+
+    public static char resolveSymbol(double digits) {
+        if (Double.isNaN(digits)) {
+            return UNIT_UNKNOWN;
+        } else {
+            if (((digits + SYMBOLS_CENTER) < UNIT_SYMBOLS.length) && ((digits + SYMBOLS_CENTER) >= 0)) {
+                return UNIT_SYMBOLS[(int) digits + SYMBOLS_CENTER];
+            } else {
+                return UNIT_UNKNOWN;
+            }
+        }
+    }
+
+}