private static void UserQueryMode(IIndex index, NotebooksFileDataSource storage)
{
Console.CancelKeyPress += new ConsoleCancelEventHandler(CancelHandler);
Stopwatch stopWatch = new Stopwatch();
var searcher = new EtSearcher(index, storage);
while (true)
{
Console.WriteLine();
Console.Write("Enter the query: ");
string query = Console.ReadLine();
stopWatch.Reset();
stopWatch.Start();
try
{
var result = searcher.Search(query);
stopWatch.Stop();
PrintResults(result, stopWatch.ElapsedMilliseconds, storage);
}
catch
{
Console.WriteLine();
Console.WriteLine("Invalid query format");
Console.WriteLine();
}
}
}
private static void DemoSearch(IIndex index, NotebooksFileDataSource storage)
{
var queries = new[] {
"apple && 13",
"iru || samsung",
"apple air && ! 11 && ! 11.6"
};
Stopwatch stopWatch = new Stopwatch();
var searcher = new EtSearcher(index, storage);
foreach (var query in queries)
{
Console.WriteLine();
Console.Write($"Searching {query}:");
stopWatch.Reset();
stopWatch.Start();
try
{
var result = searcher.Search(query);
stopWatch.Stop();
PrintResults(result, stopWatch.ElapsedMilliseconds, storage);
}
catch
{
Console.WriteLine();
Console.WriteLine("Invalid query format");
Console.WriteLine();
}
}
}
public static void Main(string[] args)
{
// const string Filename = "notebooks_210000.csv";
const string Filename = "notebooks.csv";
/*var arguments = new List<string>() { "--generate", "210000" };
* args = arguments.ToArray();*/
if (args.Count() >= 2 && args[0] == "--generate")
{
if (int.TryParse(args[1], out var number))
{
ExampleDataGenerator.Generate(Filename, number);
return;
}
}
var storage = new NotebooksFileDataSource(Filename);
var index = BuildIndex(storage);
if (args.Count() == 1 && args[0] == "--demo")
{
DemoSearch(index, storage);
return;
}
UserQueryMode(index, storage);
Console.ReadKey();
}
private static void PrintResults(List <int> result, long timeMeasure, NotebooksFileDataSource storage)
{
Console.WriteLine();
var maxShow = Math.Min(result.Count, 10);
if (maxShow > 0)
{
Console.WriteLine($"First {maxShow} results: ");
for (var r = 0; r < maxShow; r++)
{
var notebook = storage.GetAllNotebook()[result[r]];
Console.WriteLine($"Id {result[r]}. Brand {notebook.Brand}, Model {notebook.Model}");
}
Console.WriteLine();
}
Console.WriteLine($"Total results: {result.Count}. Search time: {timeMeasure} ms.");
}
private static IIndex BuildIndex(NotebooksFileDataSource storage)
{
Console.WriteLine($"Start indexing");
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
var indexBuilder = new InvertedIndexBuilder();
var index = indexBuilder.BuildIndex(storage);
stopWatch.Stop();
Console.WriteLine($"Indexing is finished in {stopWatch.ElapsedMilliseconds} ms");
Console.WriteLine();
Console.WriteLine($"Notebooks: {storage.GetAllNotebook().Count}.");
Console.WriteLine($"Inverted index terms size: {index.Size()}.");
Console.WriteLine($"Inverted index memory size: {GetObjectSize(index)}.");
Console.WriteLine();
return(index);
}
