public void TestAntiM()
{
_searcher = new IndexSearcher(_directory, true);
const double miles = 5.0;
Console.WriteLine("testAntiM");
// create a distance query
var dq = new DistanceQueryBuilder(_lat, _lng, miles, LatField, LngField, CartesianTierPlotter.DefaltFieldPrefix, true);
Console.WriteLine(dq);
//create a term query to search against all documents
Query tq = new TermQuery(new Term("metafile", "doc"));
var dsort = new DistanceFieldComparatorSource(dq.DistanceFilter);
Sort sort = new Sort(new SortField("foo", dsort, false));
// Perform the search, using the term query, the distance filter, and the
// distance sort
TopDocs hits = _searcher.Search(tq, dq.Filter, 1000, sort);
int results = hits.TotalHits;
ScoreDoc[] scoreDocs = hits.ScoreDocs;
// Get a list of distances
Dictionary<int, Double> distances = dq.DistanceFilter.Distances;
Console.WriteLine("Distance Filter filtered: " + distances.Count);
Console.WriteLine("Results: " + results);
Console.WriteLine("=============================");
Console.WriteLine("Distances should be 3 " + distances.Count);
Console.WriteLine("Results should be 3 " + results);
Assert.AreEqual(3, distances.Count); // fixed a store of only needed distances
Assert.AreEqual(3, results);
double lastDistance = 0;
for (int i = 0; i < results; i++)
{
Document d = _searcher.Doc(scoreDocs[i].Doc);
String name = d.Get("name");
double rsLat = NumericUtils.PrefixCodedToDouble(d.Get(LatField));
double rsLng = NumericUtils.PrefixCodedToDouble(d.Get(LngField));
Double geo_distance = distances[scoreDocs[i].Doc];
double distance = DistanceUtils.GetInstance().GetDistanceMi(_lat, _lng, rsLat, rsLng);
double llm = DistanceUtils.GetInstance().GetLLMDistance(_lat, _lng, rsLat, rsLng);
Console.WriteLine("Name: " + name + ", Distance " + distance);
Assert.IsTrue(Math.Abs((distance - llm)) < 1);
Assert.IsTrue((distance < miles));
Assert.IsTrue(geo_distance >= lastDistance);
lastDistance = geo_distance;
}
}
public ActionResult Index(string q, string city, string lat, string @long, string miles, string count)
{
IList<SelectListItem> listOfMiles = new List<SelectListItem>
{
new SelectListItem {Text = "50", Value = "50"},
new SelectListItem {Text = "100", Value = "100"}
};
IList<SelectListItem> listOfCounts = new List<SelectListItem>
{
new SelectListItem {Text = "10", Value = "10"},
new SelectListItem {Text = "50", Value = "50"},
new SelectListItem {Text = "100", Value = "100"}
};
ViewData["Miles"] = listOfMiles;
ViewData["Counts"] = listOfCounts;
var indexViewModel = new IndexViewModel
{
q = q,
lat = lat,
@long = @long
};
var analyzer = new StandardAnalyzer(_luceneVersion);
Query query;
if (string.IsNullOrEmpty(q))
{
query = new MatchAllDocsQuery();
}
else
{
var multiFieldQueryParser = new MultiFieldQueryParser(_luceneVersion, _searchFields, analyzer);
query = multiFieldQueryParser.Parse(q);
}
// create a distance query
// https://svn.apache.org/repos/asf/incubator/lucene.net/trunk/test/contrib/Spatial/TestCartesian.cs
double milesDouble = 100.0;
int countInt = 50;
double latitudeDouble;
double longitudeDouble;
if (!String.IsNullOrEmpty(miles))
{
Double.TryParse(miles, out milesDouble);
}
if (!String.IsNullOrEmpty(count))
{
int.TryParse(count, out countInt);
}
Double.TryParse(lat, out latitudeDouble);
Double.TryParse(@long, out longitudeDouble);
var distanceQuery = new DistanceQueryBuilder(latitudeDouble, longitudeDouble, milesDouble, LuceneIndexFieldMap.LatitudeField, LuceneIndexFieldMap.LongitudeField, CartesianTierPlotter.DefaltFieldPrefix, true);
var dsort = new DistanceFieldComparatorSource(distanceQuery.DistanceFilter);
var sort = new Sort(new SortField("foo", dsort, false));
var startTime = DateTime.Now;
var distanceHelper = new DistanceHelper();
// search for documents
{
TopDocs topDocs = _indexSearcher.Search(query, distanceQuery.Filter, countInt, sort);
indexViewModel.TotalHits = topDocs.TotalHits;
foreach (ScoreDoc match in topDocs.ScoreDocs)
{
Document doc = _indexSearcher.Doc(match.doc);
double prefixCodedToDouble = NumericUtils.PrefixCodedToDouble(doc.Get(LuceneIndexFieldMap.LatitudeField));
double codedToDouble = NumericUtils.PrefixCodedToDouble(doc.Get(LuceneIndexFieldMap.LongitudeField));
double distanceInKilometres = distanceHelper.DistanceInKilometres(latitudeDouble, longitudeDouble,
prefixCodedToDouble, codedToDouble);
var geo = new GeoName
{
Name = doc.Get(LuceneIndexFieldMap.FirstNameField),
Asciiname = doc.Get(LuceneIndexFieldMap.CityField),
FeatureClass = doc.Get(LuceneIndexFieldMap.FeatureClassField),
FeatureCode = doc.Get(LuceneIndexFieldMap.FeatureCodeField),
Latitude = prefixCodedToDouble,
Longitude = codedToDouble,
Timezone = doc.Get(LuceneIndexFieldMap.TimeZoneField),
DistanceInKm = distanceInKilometres
};
indexViewModel.SearchResults.Add(geo);
}
}
indexViewModel.SearchTimeMs = DateTime.Now.Subtract(startTime).TotalMilliseconds;
return View(indexViewModel);
}
