public IFilter MultiMatch <TObj>(string query, IEnumerable <MatchField <TObj> > fields)
{
var resultContainer = new ConcurrentDictionary <int, double>();
var terms = _tokinizer.GetTokens(query.ToLower());
var termIds = terms.Select(x => new { id = _vocabulary.GetIndex(x.Term), term = x.Term }).Where(x => x.id != -1);
foreach (var termId in termIds)
{
foreach (var field in fields)
{
var fieldName = field.field.GetExpressionName();
var docScore = _searchEngine.SearchForTerm(termId.id, fieldName);
foreach (var score in docScore)
{
var docTempScore = resultContainer.GetOrAdd(score.DocumentId, 0);
var newScore = docTempScore + (score.Score * field.Boost);
resultContainer.TryUpdate(score.DocumentId, newScore, docTempScore);
}
}
}
_queryDocumants = resultContainer.OrderByDescending(x => x.Value).Select(x => new DocumentScore()
{
DocumentId = x.Key, Score = x.Value
}).ToList();
return(this);
}
public IEnumerable <SearchHit <TObj> > Search <TObj>(string str, int numberOfDocuments) where TObj : class
{
var resultContainer = new ConcurrentDictionary <int, double>();
var terms = _tokinizer.GetTokens(str.ToLower());
var termIds = terms.Select(x => new { id = _vocabulary.GetIndex(x.Term), term = x.Term }).Where(x => x.id != -1);
foreach (var termId in termIds)
{
var docScore = SearchForTerm(termId.id);
foreach (var score in docScore)
{
var docTempScore = resultContainer.GetOrAdd(score.DocumentId, 0);
var newScore = docTempScore + score.Score;
resultContainer.TryUpdate(score.DocumentId, newScore, docTempScore);
}
}
return(resultContainer.OrderByDescending(x => x.Value).Take(numberOfDocuments).Select(x => new SearchHit <TObj>()
{
Score = x.Value, Document = _documentStorage.Get <TObj>(x.Key)
}));
}
