private static SortField GetSortField(SortingField field, ICollection <string> availableFields)
{
var dataType = availableFields.Contains(LuceneSearchHelper.GetFacetableFieldName(field.FieldName)) ? SortFieldType.DOUBLE : SortFieldType.STRING;
var result = new SortField(LuceneSearchHelper.ToLuceneFieldName(field.FieldName), dataType, field.IsDescending);
return(result);
}
private static string GetFacetFieldName(string originalName, ICollection <string> availableFields)
{
var result = LuceneSearchHelper.GetFacetableFieldName(originalName);
if (!availableFields.Contains(result))
{
result = LuceneSearchHelper.ToLuceneFieldName(originalName);
}
return(result);
}
private static AggregationResponse CreateRangeAggregationResponse(RangeAggregationRequest rangeAggregationRequest, IndexSearcher searcher, ICollection <string> availableFields)
{
AggregationResponse result = null;
if (rangeAggregationRequest != null)
{
var fieldName = LuceneSearchHelper.ToLuceneFieldName(rangeAggregationRequest.FieldName);
var valueFilters = rangeAggregationRequest.Values?.ToDictionary(v => v.Id, v => LuceneSearchFilterBuilder.CreateRangeFilterForValue(fieldName, v.Lower, v.Upper, v.IncludeLower, v.IncludeUpper));
result = GetAggregation(rangeAggregationRequest, valueFilters, searcher, false, null, availableFields);
}
return(result);
}
private static Filter CreateTermFilter(TermFilter termFilter, ICollection <string> availableFields)
{
Filter result = null;
if (termFilter?.FieldName != null && termFilter.Values != null)
{
var isBooleanField = availableFields.Contains(LuceneSearchHelper.GetBooleanFieldName(termFilter.FieldName));
var values = termFilter.Values.Select(v => GetFilterValue(v, isBooleanField)).ToArray();
var fieldName = LuceneSearchHelper.ToLuceneFieldName(termFilter.FieldName);
result = CreateTermsFilter(fieldName, values);
}
return(result);
}
private static Filter CreateRangeFilter(RangeFilter rangeFilter)
{
Filter result = null;
if (rangeFilter?.FieldName != null && rangeFilter.Values != null)
{
var fieldName = LuceneSearchHelper.ToLuceneFieldName(rangeFilter.FieldName);
var childFilters = rangeFilter.Values.Select(v => CreateRangeFilterForValue(fieldName, v))
.Where(f => f != null)
.ToArray();
result = JoinNonEmptyFilters(childFilters, Occur.SHOULD);
}
return(result);
}
private static Filter CreateGeoDistanceFilter(GeoDistanceFilter geoDistanceFilter)
{
Filter result = null;
if (geoDistanceFilter?.FieldName != null && geoDistanceFilter.Location != null)
{
var spatialContext = SpatialContext.GEO;
var distance = DistanceUtils.Dist2Degrees(geoDistanceFilter.Distance, DistanceUtils.EARTH_MEAN_RADIUS_KM);
var searchArea = spatialContext.MakeCircle(geoDistanceFilter.Location.Longitude, geoDistanceFilter.Location.Latitude, distance);
var spatialArgs = new SpatialArgs(SpatialOperation.Intersects, searchArea);
var fieldName = LuceneSearchHelper.ToLuceneFieldName(geoDistanceFilter.FieldName);
var strategy = new PointVectorStrategy(spatialContext, fieldName);
result = strategy.MakeFilter(spatialArgs);
}
return(result);
}
protected virtual IList <IIndexableField> ConvertToProviderFields(IndexDocumentField field)
{
// TODO: Introduce and use metadata describing value type
var result = new List <IIndexableField>();
var fieldName = LuceneSearchHelper.ToLuceneFieldName(field.Name);
var store = field.IsRetrievable ? Field.Store.YES : Field.Store.NO;
//var index = field.IsSearchable ? Field.Index.ANALYZED : field.IsFilterable ? Field.Index.NOT_ANALYZED : Field.Index.NO;
if (field.Value is string)
{
foreach (var value in field.Values)
{
result.Add(new StringField(fieldName, (string)value, store));
if (field.IsSearchable)
{
result.Add(new StringField(LuceneSearchHelper.SearchableFieldName, (string)value, Field.Store.NO));
}
}
}
else if (field.Value is bool)
{
var booleanFieldName = LuceneSearchHelper.GetBooleanFieldName(field.Name);
foreach (var value in field.Values)
{
var stringValue = value.ToStringInvariant();
result.Add(new StringField(fieldName, stringValue, store));
result.Add(new StringField(booleanFieldName, stringValue, Field.Store.NO));
}
}
else if (field.Value is DateTime)
{
var dateTimeFieldName = LuceneSearchHelper.GetDateTimeFieldName(field.Name);
foreach (var value in field.Values)
{
//TODO
//var numericField = new NumericField(fieldName, store, index != Field.Index.NO);
//numericField.SetLongValue(((DateTime)value).Ticks);
//result.Add(numericField);
result.Add(new StringField(dateTimeFieldName, value.ToStringInvariant(), Field.Store.NO));
}
}
else if (field.Value is GeoPoint)
{
var geoPoint = (GeoPoint)field.Value;
result.Add(new StringField(fieldName, geoPoint.ToString(), Field.Store.YES));
var shape = _spatialContext.MakePoint(geoPoint.Longitude, geoPoint.Latitude);
var strategy = new PointVectorStrategy(_spatialContext, fieldName);
foreach (var f in strategy.CreateIndexableFields(shape))
{
result.Add(f);
}
}
else
{
double t;
if (double.TryParse(field.Value.ToStringInvariant(), NumberStyles.Float, CultureInfo.InvariantCulture, out t))
{
var facetableFieldName = LuceneSearchHelper.GetFacetableFieldName(field.Name);
foreach (var value in field.Values)
{
var stringValue = value.ToStringInvariant();
//TODO
//var numericField = new NumericField(fieldName, store, index != Field.Index.NO);
//numericField.SetDoubleValue(double.Parse(stringValue, NumberStyles.Float, CultureInfo.InvariantCulture));
//result.Add(numericField);
result.Add(new StringField(facetableFieldName, stringValue, Field.Store.NO));
}
}
else
{
result.AddRange(field.Values.Select(value => new StringField(fieldName, value.ToStringInvariant(), store)));
}
}
return(result);
}
protected virtual IList <IIndexableField> ConvertToProviderFields(IndexDocumentField field)
{
var result = new List <IIndexableField>();
var fieldName = LuceneSearchHelper.ToLuceneFieldName(field.Name);
var store = field.IsRetrievable ? Field.Store.YES : Field.Store.NO;
switch (field.Value)
{
case string _:
foreach (var value in field.Values)
{
result.Add(new StringField(fieldName, (string)value, store));
if (field.IsSearchable)
{
result.Add(new StringField(LuceneSearchHelper.SearchableFieldName, (string)value, Field.Store.NO));
}
}
break;
case bool _:
var booleanFieldName = LuceneSearchHelper.GetBooleanFieldName(field.Name);
foreach (var value in field.Values)
{
var stringValue = value.ToStringInvariant();
result.Add(new StringField(fieldName, stringValue, store));
result.Add(new StringField(booleanFieldName, stringValue, Field.Store.NO));
}
break;
case DateTime _:
var dateTimeFieldName = LuceneSearchHelper.GetDateTimeFieldName(field.Name);
foreach (var value in field.Values)
{
var numericField = new Int64Field(fieldName, ((DateTime)value).Ticks, store);
result.Add(numericField);
result.Add(new StringField(dateTimeFieldName, value.ToStringInvariant(), Field.Store.NO));
}
break;
case GeoPoint _:
var geoPoint = (GeoPoint)field.Value;
result.Add(new StringField(fieldName, geoPoint.ToString(), Field.Store.YES));
var shape = _spatialContext.MakePoint(geoPoint.Longitude, geoPoint.Latitude);
var strategy = new PointVectorStrategy(_spatialContext, fieldName);
result.AddRange(strategy.CreateIndexableFields(shape));
break;
default:
if (double.TryParse(field.Value.ToStringInvariant(), NumberStyles.Float, CultureInfo.InvariantCulture, out _))
{
var facetableFieldName = LuceneSearchHelper.GetFacetableFieldName(field.Name);
foreach (var value in field.Values)
{
var stringValue = value.ToStringInvariant();
var doubleField = new DoubleField(fieldName, double.Parse(stringValue, NumberStyles.Float, CultureInfo.InvariantCulture), store);
result.Add(doubleField);
result.Add(new StringField(facetableFieldName, stringValue, Field.Store.NO));
}
}
else
{
result.AddRange(field.Values.Select(value => new StringField(fieldName, value.ToStringInvariant(), store)));
}
break;
}
return(result);
}