diff --git a/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/tr/column/PeriodDataTypeMap.java b/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/tr/column/PeriodDataTypeMap.java
new file mode 100644
index 0000000..8c81e8f
--- /dev/null
+++ b/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/tr/column/PeriodDataTypeMap.java
@@ -0,0 +1,33 @@
+package org.gcube.portlets.user.td.widgetcommonevent.shared.tr.column;
+
+/**
+ * 
+ * @author "Giancarlo Panichi" <a
+ *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
+ *
+ */
+public class PeriodDataTypeMap {
+
+	public static PeriodDataType map(String id) {
+		if (id.compareTo(PeriodDataType.DAY.toString()) == 0) {
+			return PeriodDataType.DAY;
+		} else {
+			if (id.compareTo(PeriodDataType.MONTH.toString()) == 0) {
+				return PeriodDataType.MONTH;
+			} else {
+				if (id.compareTo(PeriodDataType.QUARTER.toString()) == 0) {
+					return PeriodDataType.QUARTER;
+				} else {
+					if (id.compareTo(PeriodDataType.YEAR.toString()) == 0) {
+						return PeriodDataType.YEAR;
+					} else {
+						return null;
+						
+					}
+				}
+
+			}
+		}
+	}
+
+}