/// <summary>
/// Performs a boolean search into a location circle area
/// </summary>
/// <param name="SearchTermFields">Query input</param>
/// <param name="page">Results Page</param>
/// <param name="ResultsPerPage">Results per page</param>
/// <param name="limit">limit result default is 20</param>
/// <returns>Query result</returns>
internal SearchResults <T> Search(IEnumerable <SearchTerm> SearchTermFields,
int page, int ResultsPerPage, int limit = 500, List <SortField> sorting = null)
{
//System.Diagnostics.Stopwatch stopWatch = new System.Diagnostics.Stopwatch();
//stopWatch.Start();
QueryDesriptor query = SearchTermQuery(SearchTermFields);
Sort sort;
if (sorting == null)
{
if (query.InArea)
{
sort = new Sort(new SortField("Distance", SortFieldType.SCORE, true));
}
else
{
sort = Sort.RELEVANCE;
}
}
else
{
if (query.InArea)
{
sorting.Add(new SortField("Distance", SortFieldType.SCORE, true));
}
sort = new Sort(sorting.ToArray());
}
ScoreDoc[] hits;
if (query.InArea)
{
TopDocs topDocs = Searcher.Search(query.Query, query.Filter, limit, sort);
hits = topDocs.ScoreDocs;
}
else
{
hits = Searcher.Search(query.Query, null, limit, sort).ScoreDocs;
}
//stopWatch.Stop();
// Get the elapsed time as a TimeSpan value.
//TimeSpan ts = stopWatch.Elapsed;
//System.Diagnostics.Debug.WriteLine(ts);
return(PageResult(hits, page, ResultsPerPage, query.SpatialArguments));
}
/// <summary>
/// Constracts a boolean query from a searchterm dictionary
/// </summary>
/// <param name="SearchTermFields"></param>
/// <returns></returns>
private QueryDesriptor SearchTermQuery(IEnumerable <SearchTerm> SearchTermFields)
{
QueryDesriptor descriptor = new QueryDesriptor();
BooleanQuery query = new BooleanQuery();
Query areaQuery = null;
foreach (SearchTerm entry in SearchTermFields)
{
if (entry == null)
{
continue;
}
if (entry.InArea != null && areaQuery == null)
{
IPoint p = SpatialContext.MakePoint(entry.InArea.Center.Latitude, entry.InArea.Center.Longitude);
var circle = SpatialContext.MakeCircle(entry.InArea.Center.Latitude, entry.InArea.Center.Longitude, DistanceUtils.Dist2Degrees(entry.InArea.Radius, DistanceUtils.EARTH_EQUATORIAL_RADIUS_KM));
descriptor.SpatialArguments = new SpatialArgs(SpatialOperation.IsWithin, circle);
descriptor.Filter = spatialStrategy.MakeFilter(descriptor.SpatialArguments);
descriptor.InArea = true;
areaQuery = ((PointVectorStrategy)spatialStrategy).MakeQueryDistanceScore(descriptor.SpatialArguments);
}
else if (entry.SearchingOption == SearchFieldOption.INTRANGE)
{
NumericRangeQuery <int> nq = NumericRangeQuery.NewInt32Range(entry.Field, entry.FromAsInt, entry.ToAsInt, true, true);
query.Add(nq, entry.TermOccur);
}
else if (entry.SearchingOption == SearchFieldOption.DOUBLERANGE || entry.SearchingOption == SearchFieldOption.DECIMALRANGE)
{
NumericRangeQuery <double> nq = NumericRangeQuery.NewDoubleRange(entry.Field, entry.FromAsDouble, entry.ToAsDouble, true, true);
query.Add(nq, entry.TermOccur);
}
//else if (entry.SearchingOption == SearchFieldOption.DECIMALRANGE)
//{
// TermRangeQuery nq = TermRangeQuery.NewStringRange(entry.Field, entry.FromAsDecimal, entry.ToAsDecimal, true, true);
// query.Add(nq, entry.TermOccur);
//}
else if (entry.SearchingOption == SearchFieldOption.LIKE)
{
QueryParser parser = new QueryParser(wings.IndexVersion, entry.Field, Analyzer);
Query pquery = WildparseQuery(wings.Transformation.Transform(entry.Term), parser);
query.Add(pquery, entry.TermOccur);
}
else if (entry.SearchingOption == SearchFieldOption.EXACT)
{
var exactQuery = new TermQuery(new Term(entry.Field, QueryParser.Escape(entry.Term.Trim())));
query.Add(exactQuery, entry.TermOccur);
}
else if (entry.SearchingOption == SearchFieldOption.FUZZY)
{
QueryParser parser = new QueryParser(wings.IndexVersion, entry.Field, Analyzer);
Query pquery = FuzzyparseQuery(wings.Transformation.Transform(entry.Term), parser);
query.Add(pquery, entry.TermOccur);
}
else
{
QueryParser parser = new QueryParser(wings.IndexVersion, entry.Field, Analyzer);
Query pquery = ParseQuery(entry.Term, parser);
query.Add(pquery, entry.TermOccur);
}
}
if (areaQuery != null)
{
BooleanQuery areaQueries = new BooleanQuery
{
{ query, Occur.MUST },
{ areaQuery, Occur.MUST }
};
descriptor.Query = areaQueries;
}
else
{
descriptor.Query = query;
}
return(descriptor);
}
