public void testIsNumeric()
        {
            Assert.IsTrue(StagingRange.isNumeric("0"));
            Assert.IsTrue(StagingRange.isNumeric("1"));
            Assert.IsTrue(StagingRange.isNumeric("-1"));
            Assert.IsTrue(StagingRange.isNumeric("1.1"));

            Assert.IsFalse(StagingRange.isNumeric(null));
            Assert.IsFalse(StagingRange.isNumeric(""));
            Assert.IsFalse(StagingRange.isNumeric("1.1.1"));
            Assert.IsFalse(StagingRange.isNumeric("NAN"));
        }
        // Parses a string in having lists of ranges into a List of Range objects
        // @param values String representing sets value ranges
        // @return a parsed list of string Range objects
        public static List <Range> splitValues(String values)
        {
            List <Range> convertedRanges = new List <Range>();

            if (values != null)
            {
                // if the value of the string is "*", then consider it as matching anything
                if (values == "*")
                {
                    convertedRanges.Add(_MATCH_ALL_ENDPOINT);
                }
                else
                {
                    // split the string; the "9999" makes sure to not discard empty strings
                    String[] ranges = values.Split(",".ToCharArray(), 9999);

                    foreach (String range in ranges)
                    {
                        // Not sure if this is the best way to handle this, but I ran into a problem when I converted the CS data.  One of the tables had
                        // a value of "N0(mol-)".  This fails since it considers it a range and we require our ranges to have the same size on both sides.
                        // The only thing I can think of is for cases like this, assume it is not a range and use the whole string as a non-range value.
                        // The problem is that if something is entered incorrectly and was supposed to be a range, we will not process it correctly.  We
                        // may need to revisit this issue later.
                        String[] parts = range.Split("-".ToCharArray());
                        if (parts.Length == 2)
                        {
                            String low  = parts[0].Trim();
                            String high = parts[1].Trim();

                            // check if both sides of the range are numeric values; if so the length does not have to match
                            bool isNumericRange = StagingRange.isNumeric(low) && StagingRange.isNumeric(high);

                            // if same length, a numeric range, or one of the parts is a context variable, use the low and high as range.  Otherwise consier
                            // a single value (i.e. low = high)
                            if (low.Length == high.Length || isNumericRange || DecisionEngineFuncs.isReferenceVariable(low) || DecisionEngineFuncs.isReferenceVariable(high))
                            {
                                convertedRanges.Add(new StagingRange(low, high));
                            }
                            else
                            {
                                convertedRanges.Add(new StagingRange(range.Trim(), range.Trim()));
                            }
                        }
                        else
                        {
                            convertedRanges.Add(new StagingRange(range.Trim(), range.Trim()));
                        }
                    }
                }
            }

            return(convertedRanges);
        }