protected override SortedDocValues GetSortedDocValues(AtomicReaderContext context, string field)
{
SortedSetDocValues sortedSet = FieldCache.DEFAULT.GetDocTermOrds(context.AtomicReader, field);
if (sortedSet.ValueCount >= int.MaxValue)
{
throw new NotSupportedException("fields containing more than " + (int.MaxValue - 1) + " unique terms are unsupported");
}
SortedDocValues singleton = DocValues.UnwrapSingleton(sortedSet);
if (singleton != null)
{
// it's actually single-valued in practice, but indexed as multi-valued,
// so just sort on the underlying single-valued dv directly.
// regardless of selector type, this optimization is safe!
return(singleton);
}
else if (outerInstance.selector == Selector.MIN)
{
return(new MinValue(sortedSet));
}
else
{
if (sortedSet is RandomAccessOrds == false)
{
throw new NotSupportedException("codec does not support random access ordinals, cannot use selector: " + outerInstance.selector);
}
RandomAccessOrds randomOrds = (RandomAccessOrds)sortedSet;
switch (outerInstance.selector)
{
case Selector.MAX: return(new MaxValue(randomOrds));
case Selector.MIDDLE_MIN: return(new MiddleMinValue(randomOrds));
case Selector.MIDDLE_MAX: return(new MiddleMaxValue(randomOrds));
case Selector.MIN:
default:
if (Debugging.AssertsEnabled)
{
Debugging.Assert(false);
}
return(null);
}
}
}
internal MiddleMaxValue(RandomAccessOrds @in)
{
this.@in = @in;
}
