private Ephemeris decadeEphemerisOf(DateTimeOffset date)
{
int startYear = 10 * (date.Year / 10);
string fileName = String.Format("{0}{1}.eph", Name, startYear);
FileInfo[] files = EphemerisDirectory.GetFiles(fileName, SearchOption.AllDirectories);
Ephemeris decadeEphe = null;
if (files.Length != 0)
{
IFormatter formatter = new BinaryFormatter();
Stream stream = new FileStream(EphemerisDirectory + fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
decadeEphe = (Ephemeris)formatter.Deserialize(stream);
stream.Close();
}
if (decadeEphe == null)
{
decadeEphe = new Ephemeris(Name + startYear.ToString(), PositionDelegate);
DateTimeOffset start = new DateTimeOffset(startYear, 1, 1, 0, 0, 0, TimeSpan.Zero);
DateTimeOffset end = new DateTimeOffset(startYear + 10, 1, 1, 0, 0, 0, TimeSpan.Zero);
decadeEphe.calculate(start, end);
decadeEphe.save();
}
return(decadeEphe);
}
private void save()
{
string fileName = Name + ".eph";
FileInfo[] files = EphemerisDirectory.GetFiles(fileName, SearchOption.AllDirectories);
if (files.Length != 0)
{
throw new Exception("Ephemeris already existed: " + fileName + " in " + EphemerisDirectory.Name);
}
IFormatter formatter = new BinaryFormatter();
Stream stream = new FileStream(EphemerisDirectory + fileName, FileMode.Create, FileAccess.Write);
formatter.Serialize(stream, this);
stream.Close();
}