Add helper methods for numer and date

src/main/java/org/spin/service/grpc/util/Service.java

@@ -81,7 +81,7 @@ public static String getUuidFromId(String tableName, int id, String transactionN
 	 * @param value
 	 * @param message
 	 */
-	public static  java.sql.Timestamp validateDate(com.google.protobuf.Timestamp value, String message) {
+	public static java.sql.Timestamp validateDate(com.google.protobuf.Timestamp value, String message) {
 		if(value == null) {
 			throw new AdempiereException(message);
 		}

src/main/java/org/spin/service/grpc/util/value/NumberManager.java

@@ -19,6 +19,8 @@
 
 import org.compiere.util.Util;
 
+import com.google.protobuf.Value;
+
 /**
  * Class for handle Number (BigDecimal, Integer, Double) values
  * @author Edwin Betancourt, EdwinBetanc0urt@outlook.com, https://github.com/EdwinBetanc0urt
@@ -186,5 +188,19 @@ public static int getIntFromString(String stringValue) {
 		}
 		return integerValue;
 	}
+
+	public static BigDecimal convertFromValueToDecimal(Value value) {
+		if(value.hasStringValue()) {
+			return NumberManager.getBigDecimalFromString(value.getStringValue());
+		}
+		return null;
+	}
+
+	public static Value convertFromDecimalToValue(BigDecimal value) {
+		if(value != null) {
+			return Value.newBuilder().setStringValue(value.toPlainString()).build();
+		}
+		return Value.newBuilder().build();
+	}
 
 }

src/main/java/org/spin/service/grpc/util/value/TimeManager.java

@@ -135,5 +135,12 @@ public static long getLongFromTimestamp(Timestamp value) {
 		}
 		return value.getTime();
 	}
+
+	public static Timestamp convertValueToDate(com.google.protobuf.Timestamp value) {
+		return ValueManager.getDateFromTimestampDate(value);
+	}
 
+	public static com.google.protobuf.Timestamp convertDateToValue(Timestamp value) {
+		return ValueManager.getTimestampFromDate(value);
+	}
 }