private static IEnumerable <Selection> ReadSelectionFromOptions(SelectOptions options)
{
ITimestampStringConverter timestampConverter = TimestampStringConverterResolver.Default.Resolve(options.TimestampFormat);
var selection = Selection.Parse(options.Name, options.FromTimestamp, options.ToTimestamp, timestampConverter);
return(new[] { selection });
}
private static void Configure(SelectContext context, SelectOptions options)
{
// read from options or config file
var selections = Enumerable.Empty <Selection>();
if (String.IsNullOrWhiteSpace(options.ConfigFilePath))
{
selections = ReadSelectionFromOptions(options);
}
else
{
selections = ReadSelectionsFromConfigFile(context, options.ConfigFilePath);
}
if (selections.Any())
{
var observers = CreateObserversForSelections(selections, options).ToList();
observers.ForEach(context.Observers.Add);
context.Selection = Selection.Union(selections);
}
}
private static IEnumerable <FilterObserver> CreateObserversForSelections(IEnumerable <Selection> selections, SelectOptions options)
{
HashSet <string> paths = new HashSet <string>();
List <FilteringObserver> observers = new List <FilteringObserver>();
foreach (var selection in selections)
{
string path = options.OutputFilePath;
string name = (selection.Name ?? String.Empty).Trim();
if (String.IsNullOrWhiteSpace(path) && String.IsNullOrWhiteSpace(name) == false)
{
path = options.InputFilePath;
}
if (String.IsNullOrWhiteSpace(path) == false)
{
if (path.Contains("{name}"))
{
path = path.Replace("{name}", name);
}
else if (String.IsNullOrWhiteSpace(name) == false)
{
path = Path.GetFileNameWithoutExtension(path) + $".{name}" + Path.GetExtension(path);
}
}
// use only unique paths
if (path != options.InputFilePath && paths.Add(path))
{
var output = UXI.Filters.Common.FileHelper.DescribeOutput(
path,
options.InputFileFormat,
options.DefaultInputFileFormat,
typeof(TimestampedDataPayload),
(String.IsNullOrWhiteSpace(path)) ? Console.Out : TextWriter.Null // use Console.Out for empty path only
);
observers.Add(new FilteringObserver(selection, output));
}
}
return(observers);
}
