NumericComparator
Abstract numeric comparator for comparing numeric values. This comparator provides a skipping functionality – an iterator that can skip over non-competitive documents.
Parameter field provided in the constructor is used as a field name in the default implementations of the methods getNumericDocValues and getPointValues to retrieve doc values and points. You can pass a dummy value for a field name (e.g. when sorting by script), but in this case you must override both of these methods.
Inheritors
Types
Functions
Returns a negative integer if first is less than second, 0 if they are equal and a positive integer otherwise. Default impl to assume the type implements Comparable and invoke .compareTo; be sure to override this method if your FieldComparator's type isn't a Comparable or if your values may sometimes be null
Informs the comparator that the skipping of documents should be disabled. This function is called by TopFieldCollector in cases when the skipping functionality should not be applied or not necessary. An example could be when search sort is a part of the index sort, and can be already efficiently handled by TopFieldCollector, and doing extra work for skipping in the comparator is redundant.
Get a per-segment LeafFieldComparator to collect the given [ ]. All docIDs supplied to this [ ] are relative to the current reader (you must add docBase if you need to map it to a top-level docID).
Informs the comparator that sort is done on this single field. This is useful to enable some optimizations for skipping non-competitive documents.
Record the top value, for future calls to LeafFieldComparator.compareTop. This is only called for searches that use searchAfter (deep paging), and is called before any calls to .getLeafComparator.