public override object ConvertFrom(ITypeDescriptorContext context, Globalization.CultureInfo culture, object value)
{
if (value == null)
{
throw GetConvertFromException(value);
}
var source = value as string;
if (source != null)
{
return(ExtendedDateTimeCollection.Parse(source));
}
return(base.ConvertFrom(context, culture, value));
}
internal static string Serialize(ExtendedDateTimeCollection extendedDateTimeCollection)
{
var stringBuilder = new StringBuilder();
stringBuilder.Append('{');
for (int i = 0; i < extendedDateTimeCollection.Count; i++)
{
stringBuilder.Append(extendedDateTimeCollection[i].ToString());
if (i != extendedDateTimeCollection.Count - 1) // Don't put comma after last element.
{
stringBuilder.Append(",");
}
}
stringBuilder.Append('}');
return(stringBuilder.ToString());
}
public void CanRoundTrip()
{
Assert.AreEqual("{1667,1668,1670..1672}", ExtendedDateTimeCollection.Parse("{1667,1668,1670..1672}").ToString());
Assert.AreEqual("{1960,1961-12}", ExtendedDateTimeCollection.Parse("{1960,1961-12}").ToString());
}
internal static ExtendedDateTimeCollection Parse(string extendedDateTimeCollectionString, ExtendedDateTimeCollection collection = null)
{
if (string.IsNullOrWhiteSpace(extendedDateTimeCollectionString))
{
return(null);
}
var hasStartBrace = extendedDateTimeCollectionString[0] == '{';
var hasEndBrace = extendedDateTimeCollectionString[extendedDateTimeCollectionString.Length - 1] == '}';
if (!hasStartBrace || !hasEndBrace)
{
throw new ParseException("A collection string must be surrounded by curly braces.", extendedDateTimeCollectionString);
}
var contentsString = extendedDateTimeCollectionString.Substring(1, extendedDateTimeCollectionString.Length - 2);
var closingChar = (char?)null;
var setRanges = new Dictionary <int, int>(); // A dictionary of indexes where sets begin and end within the contents string.
var setStartingIndex = (int?)null;
for (int i = 0; i < contentsString.Length; i++) // Locate nested sets.
{
if (contentsString[i] == '{' && setStartingIndex == null)
{
closingChar = '}';
setStartingIndex = i;
}
else if (contentsString[i] == '[' && setStartingIndex == null)
{
closingChar = ']';
setStartingIndex = i;
}
else if (contentsString[i] == closingChar && setStartingIndex != null)
{
setRanges.Add(setStartingIndex.Value, i);
setStartingIndex = null;
}
}
var currentSetRangeIndex = 0;
var remainingChars = new List <char>();
if (collection == null)
{
collection = new ExtendedDateTimeCollection();
}
for (int i = 0; i < contentsString.Length; i++) // Add set contents, including nested sets.
{
if (setRanges.Count > currentSetRangeIndex && i == setRanges.Keys.ElementAt(currentSetRangeIndex))
{
var preceedingElementsString = new string(remainingChars.ToArray()); // Add elements preceeding the nested set.
var preceedingElementStrings = preceedingElementsString.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var preceedingElementString in preceedingElementStrings)
{
if (preceedingElementString.Contains(".."))
{
collection.Add((IExtendedDateTimeCollectionChild)ExtendedDateTimeRangeParser.Parse(preceedingElementString));
}
else
{
collection.Add((IExtendedDateTimeCollectionChild)ExtendedDateTimeParser.Parse(preceedingElementString));
}
}
remainingChars.Clear();
var setString = contentsString.Substring(i, setRanges[i] - i); // Add nested set.
if (setString[0] == '{')
{
collection.Add((IExtendedDateTimeCollectionChild)ExtendedDateTimeCollectionParser.Parse(setString));
}
else
{
collection.Add((IExtendedDateTimeCollectionChild)ExtendedDateTimePossibilityCollectionParser.Parse(setString));
}
i = setRanges[i];
currentSetRangeIndex++;
}
else
{
remainingChars.Add(contentsString[i]);
}
}
var remainingElementsString = new string(remainingChars.ToArray()); // Add all elements that remain.
var remainingElementStrings = remainingElementsString.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var remainingElementString in remainingElementStrings)
{
if (remainingElementString.Contains(".."))
{
collection.Add((IExtendedDateTimeCollectionChild)ExtendedDateTimeRangeParser.Parse(remainingElementString));
}
else
{
collection.Add((IExtendedDateTimeCollectionChild)ExtendedDateTimeParser.Parse(remainingElementString));
}
}
return(collection);
}