DocIdBitSet
, FieldCacheDocIdSet
, FilteredDocIdSet
, FixedBitSet
, OpenBitSet
, SortedVIntList
public abstract class DocIdSet extends Object
iterator()
to provide access to the set.Modifier and Type | Field | Description |
---|---|---|
static DocIdSet |
EMPTY_DOCIDSET |
An empty
DocIdSet instance for easy use, e.g. |
Constructor | Description |
---|---|
DocIdSet() |
Modifier and Type | Method | Description |
---|---|---|
boolean |
isCacheable() |
This method is a hint for
CachingWrapperFilter , if this DocIdSet
should be cached without copying it into a BitSet. |
abstract DocIdSetIterator |
iterator() |
Provides a
DocIdSetIterator to access the set. |
public static final DocIdSet EMPTY_DOCIDSET
DocIdSet
instance for easy use, e.g. in Filters that hit no documents.public abstract DocIdSetIterator iterator() throws IOException
DocIdSetIterator
to access the set.
This implementation can return null
or
EMPTY_DOCIDSET.iterator()
if there
are no docs that match.IOException
public boolean isCacheable()
CachingWrapperFilter
, if this DocIdSet
should be cached without copying it into a BitSet. The default is to return
false
. If you have an own DocIdSet
implementation
that does its iteration very effective and fast without doing disk I/O,
override this method and return true.
Copyright © 2000-2018 Apache Software Foundation. All Rights Reserved.