Added an enum for months

java/com.sap.sse.datamining.shared/src/com/sap/sse/datamining/shared/Month.java

@@ -0,0 +1,34 @@
+package com.sap.sse.datamining.shared;
+
+public enum Month {
+    
+    January, February, March, April, May, June, Juli, August, September, October, November, December;
+
+    /**
+     * Private cache of all the constants.
+     */
+    private static final Month[] VALUES = Month.values();
+    
+    /**
+     * @param month the month as <code>int</code> to represent, from 1 (January) to 12 (December)
+     * @return the month, not null
+     * @throws IllegalArgumentException if the given month isn't valid
+     */
+    public static Month fromInt(int month) {
+        if (month < 1 || month > 12) {
+            throw new IllegalArgumentException("Invalid value for MonthOfYear: " + month);
+        }
+        return VALUES[month - 1];
+    }
+    
+    /**
+     * Gets the month {@code int} value.<br />
+     * The values are numbered from 1 (January) to 12 (December).
+     *
+     * @return the month as <code>int</code>, from 1 (January) to 12 (December)
+     */
+    public int asInt() {
+        return ordinal() + 1;
+    }
+
+}