| Package | Description | 
|---|---|
| org.apache.lucene.search | Code to search indices. | 
| org.apache.lucene.util | Some utility classes. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | DocValuesDocIdSetBase class for DocIdSet to be used with DocValues. | 
| Modifier and Type | Field and Description | 
|---|---|
| static DocIdSet | DocIdSet. EMPTYAn empty  DocIdSetinstance | 
| Modifier and Type | Method and Description | 
|---|---|
| protected DocIdSet | LRUQueryCache. cacheImpl(BulkScorer scorer,
         int maxDoc)Default cache implementation: uses  RoaringDocIdSetfor sets that
 have a density < 1% and aBitDocIdSetover aFixedBitSetotherwise. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | BitDocIdSet | 
| class  | NotDocIdSet | 
| class  | RoaringDocIdSetDocIdSetimplementation inspired from http://roaringbitmap.org/
 The space is divided into blocks of 2^16 bits and each block is encoded
 independently. | 
| Modifier and Type | Method and Description | 
|---|---|
| DocIdSet | DocIdSetBuilder. build()Build a  DocIdSetfrom the accumulated doc IDs. | 
| Constructor and Description | 
|---|
| NotDocIdSet(int maxDoc,
           DocIdSet in)Sole constructor. | 
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