private void BuildBloomFilter(BloomFilterParameters parameters, GeneratedData data)
{
if (parameters.Disabled)
{
return;
}
using (new Timer("DataGenerator.BuildBloomFilter"))
{
var filter = new BloomFilter(parameters.FilterSizeBytes * 8, parameters.HashFunctionsCount);
var counter = new TestExecutor.MatchCounter();
foreach (var word in Words.Value)
{
// if (word.Length < 3) continue;
if (!TestExecutor.Match(data, word, data.Parameters, counter, skipBloomFilter: true))
{
continue;
}
var processed = ProcessWordForBloomFilter(parameters, word);
filter.add(processed);
}
data.BloomFilter = filter;
using (new Timer("DataGenerator.BuildBloomFilter[retouch]"))
{
if (parameters.RetouchWordCount > 0)
{
var retouched = FakeWordsByFrequency.Value
.Where(t => t.Item2 > 2)
.Where(t => TestExecutor.Match(data, t.Item1, data.Parameters, counter))
.Take(parameters.RetouchWordCount.Value)
.ToArray();
foreach (var tuple in retouched)
{
var word = tuple.Item1;
var processed = ProcessWordForBloomFilter(parameters, word);
filter.retouch(processed, parameters.RetouchMaxWeight ?? 0);
}
// WriteRetouched(data.Parameters.Id.Value, retouched);
}
else if (parameters.RetouchMinRelWeight != null)
{
var falsePositives = FakeWordsByFrequency.Value
.Where(t => t.Item2 > 2)
.Where(t => TestExecutor.Match(data, t.Item1, data.Parameters, counter))
.ToArray();
var falsePositivesBF = new BloomFilter(filter.m, filter.k);
foreach (var fp in falsePositives)
{
var processed = ProcessWordForBloomFilter(parameters, fp.Item1);
falsePositivesBF.add(processed, fp.Item2);
}
filter.retouch(falsePositivesBF, parameters.RetouchMinRelWeight.Value);
}
}
}
}
