public virtual float ParseFloat(System.String val)
{
int shift = val[0] - NumericUtils.SHIFT_START_INT;
if (shift > 0 && shift <= 31)
throw new FieldCacheImpl.StopFillCacheException();
return NumericUtils.SortableIntToFloat(NumericUtils.PrefixCodedToInt(val));
}
public override DocIdSet GetDocIdSet(IndexReader reader)
{
// we transform the floating point numbers to sortable integers
// using NumericUtils to easier find the next bigger/lower value
float inclusiveLowerPoint;
float inclusiveUpperPoint;
if (lowerVal != null)
{
float f = System.Convert.ToSingle(((System.ValueType)lowerVal));
if (!includeUpper && f > 0.0f && System.Single.IsInfinity(f))
{
return(DocIdSet.EMPTY_DOCIDSET);
}
int i = NumericUtils.FloatToSortableInt(f);
inclusiveLowerPoint = NumericUtils.SortableIntToFloat(includeLower?i:(i + 1));
}
else
{
inclusiveLowerPoint = System.Single.NegativeInfinity;
}
if (upperVal != null)
{
float f = System.Convert.ToSingle(((System.ValueType)upperVal));
if (!includeUpper && f < 0.0f && System.Single.IsInfinity(f))
{
return(DocIdSet.EMPTY_DOCIDSET);
}
int i = NumericUtils.FloatToSortableInt(f);
inclusiveUpperPoint = NumericUtils.SortableIntToFloat(includeUpper?i:(i - 1));
}
else
{
inclusiveUpperPoint = System.Single.PositiveInfinity;
}
if (inclusiveLowerPoint > inclusiveUpperPoint)
{
return(DocIdSet.EMPTY_DOCIDSET);
}
float[] values = Lucene.Net.Search.FieldCache_Fields.DEFAULT.GetFloats(reader, field, (Lucene.Net.Search.FloatParser)parser);
// we only request the usage of termDocs, if the range contains 0
return(new AnonymousClassFieldCacheDocIdSet(values, inclusiveLowerPoint, inclusiveUpperPoint, this, reader, (inclusiveLowerPoint <= 0.0f && inclusiveUpperPoint >= 0.0f)));
}
/// <summary>we fake a float test using int2float conversion of NumericUtils </summary>
private void TestFloatRange(int precisionStep)
{
System.String field = "ascfield" + precisionStep;
int lower = -1000;
int upper = +2000;
System.Single tempAux = (float)NumericUtils.SortableIntToFloat(lower);
System.Single tempAux2 = (float)NumericUtils.SortableIntToFloat(upper);
Query tq = NumericRangeQuery.NewFloatRange(field, precisionStep, tempAux, tempAux2, true, true);
TopDocs tTopDocs = searcher.Search(tq, 1, null);
Assert.AreEqual(upper - lower + 1, tTopDocs.TotalHits, "Returned count of range query must be equal to inclusive range length");
System.Single tempAux3 = (float)NumericUtils.SortableIntToFloat(lower);
System.Single tempAux4 = (float)NumericUtils.SortableIntToFloat(upper);
Filter tf = NumericRangeFilter.NewFloatRange(field, precisionStep, tempAux3, tempAux4, true, true);
tTopDocs = searcher.Search((Query) new MatchAllDocsQuery(), tf, (int)1, (IState)null);
Assert.AreEqual(upper - lower + 1, tTopDocs.TotalHits, "Returned count of range filter must be equal to inclusive range length");
}