public IExtractorDatabaseReader Extract()
{
// start with a clean slate (in case this is an update rather than an initial extraction)
_extractorDatabase.DropAndReCreate();
// a list of files which contain data
// see ftp://ftp.iana.org/tz/code/Makefile
var dataFileNameList = new []
{
// YDATA
"africa",
"antarctica",
"asia",
"australasia",
"europe",
"northamerica",
"southamerica",
"pacificnew",
"etcetera",
"backward",
// TABDATA
"zone.tab",
// OTHER
"backzone"
};
foreach (var dataFileName in dataFileNameList)
{
var dataFile =
_fileSource.SingleOrDefault(
file =>
file.Name.Equals(
dataFileName,
StringComparison.InvariantCultureIgnoreCase));
if (null != dataFile)
{
_parser.Parse(dataFile, _extractorDatabase);
}
}
return(new ExtractorDatabaseReader(_extractorDatabase));
}
