public static HistoricalDate Parse(string text)
{
if (String.IsNullOrEmpty(text))
{
return(null);
}
// --1 term:
// 1263 [ca.]
// av.1263 [ca.]
// pt.1263 [ca.]
// sec.XII [ca.]
// --2 terms:
// 1263 [ca.] - 1321 [ca.]
// sec.XII [ca.] - XIII [ca.]</code>
Match m = _dateRegex.Match(text);
if (!m.Success)
{
return(null);
}
HistoricalDate date = new HistoricalDate();
// ap: implies 1 term only, non-century
if (m.Groups["ap"].Length > 0)
{
// av
if (m.Groups["ap"].Value.ToLowerInvariant().StartsWith("av", StringComparison.OrdinalIgnoreCase))
{
date.SetEndPoint(new Datation(Int16.Parse(m.Groups["val"].Value, CultureInfo.InvariantCulture)));
}
// pt
else
{
date.SetStartPoint(new Datation(Int16.Parse(m.Groups["val"].Value, CultureInfo.InvariantCulture)));
}
} // (ap)
else
{
int n1, n2 = 0;
bool cent1 = false, cent2 = false;
// century or centuries
if (m.Groups["cent"].Length > 0)
{
// get 1st century
n1 = (short)RomanNumber.FromRoman(m.Groups["cent"].Value);
cent1 = true;
// get 2nd century if any
if (m.Groups["cent2"].Length > 0)
{
n2 = (short)RomanNumber.FromRoman(m.Groups["cent2"].Value);
cent2 = true;
}
} // (cent)
else
{
// val
n1 = Int16.Parse(m.Groups["val"].Value, CultureInfo.InvariantCulture);
// val2, if any
if (m.Groups["val2"].Length > 0)
{
n2 = Int16.Parse(m.Groups["val2"].Value, CultureInfo.InvariantCulture);
}
} // (!cent)
if (n2 != 0)
{
date.SetStartPoint(new Datation(n1, cent1));
date.SetEndPoint(new Datation(n2, cent2));
}
else
{
date.SetSinglePoint(new Datation(n1, cent1));
}
} // (!ap)
// about modifier
if (m.Groups["ca"].Length > 0)
{
if (date.GetDateType() == HistoricalDateType.Range)
{
date.A.IsApproximate = true;
date.B.IsApproximate = true;
}
else
{
date.A.IsApproximate = true;
}
}
return(date);
}
