/// <summary>
/// Creates a new GeonamesParser using the provided IDictionary to map each Cities'
/// string TZ Name to int TimeZone ids.
/// </summary>
public GeonamesParser(DataTable featureCodesDataTable, GeonamesDirectoryInfo directory)
{
Directory = directory;
_geonamesFiles = directory.ValidGeonamesFiles;
FEATURECODE_FILE_PATH = Environment.CurrentDirectory + @"\Resources\geonames_feature_codes.txt";
_regex = new Regex(@"\t", RegexOptions.Compiled);
_maxParallelism = Environment.ProcessorCount;
// Assign a reusable buffer for each thread.
_bufferPool = new ConcurrentPool <string[]>(_maxParallelism);
// Allocate buffer pool.
for (int i = 0; i < _maxParallelism; i++)
{
// Adding string[] with max number of City fields for size.
_bufferPool.Push(new string[City.NUM_FIELDS]);
}
ParsedEntries = 0;
if (null != featureCodesDataTable)
{
_featureCodesDataTable = featureCodesDataTable;
}
else
{
throw new ArgumentNullException("featureCodesDataTable");
}
}
/// <summary>
/// Parses the provided line into a City.
/// </summary>
/// <param name="line">The line to parse into a city.</param>
/// <returns>A city parsed from the provided line.</returns>
private object[] ParseCity(string line)
{
// Fields corresponding to each City data type.
string[] fields = SplitTabs(line);
// Parse fields into each data type.
object[] values = new object[]
{
(object)DBNull.Value,
City.ParseName(fields[City.NameIndex]),
City.ParseAsciiName(fields[City.AsciiNameIndex]),
City.ParseAlternateNames(fields[City.AlternateNamesIndex]),
City.ParseLatitude(fields[City.LatitudeIndex]),
City.ParseLongitude(fields[City.LongitudeIndex]),
City.ParseFeatureClass(fields[City.FeatureClassIndex]) ?? (object)DBNull.Value,
City.ParseFeatureCode(fields[City.FeatureCodeIndex]),
City.ParseCountryCode(fields[City.CountryCodeIndex]),
City.ParseCountryCode2(fields[City.CountryCode2Index]),
City.ParsePopulation(fields[City.PopulationIndex]),
City.ParseElevation(fields[City.ElevationIndex]) ?? (object)DBNull.Value,
City.ParseModificationDate(fields[City.ModificationDateIndex]),
City.ParseAdmin1Code(fields[City.Admin1CodeIndex]),
City.ParseAdmin2Code(fields[City.Admin2CodeIndex]),
City.ParseAdmin3Code(fields[City.Admin3CodeIndex]),
City.ParseAdmin4Code(fields[City.Admin4CodeIndex]),
City.ParseGtopo30(fields[City.Gtopo30Index]),
(object)DBNull.Value,
fields[City.TimeZoneIdIndex],
(object)DBNull.Value
};
_bufferPool.Push(fields);
return(values);
}
