Class PForDeltaDocIdSet

DocIdSet implementation based on pfor-delta encoding.

This implementation is inspired from LinkedIn's Kamikaze (http://data.linkedin.com/opensource/kamikaze) and Daniel Lemire's JavaFastPFOR (https://github.com/lemire/JavaFastPFOR).

On the contrary to the original PFOR paper, exceptions are encoded with FOR instead of Simple16.

Inheritance

object

DocIdSet

PForDeltaDocIdSet

Inherited Members

DocIdSet.Bits

DocIdSet.NewAnonymous(Func<DocIdSetIterator>)

DocIdSet.NewAnonymous(Func<DocIdSetIterator>, Func<IBits>)

DocIdSet.NewAnonymous(Func<DocIdSetIterator>, Func<bool>)

DocIdSet.NewAnonymous(Func<DocIdSetIterator>, Func<IBits>, Func<bool>)

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Lucene.Net.Util

Assembly: Lucene.Net.dll

Syntax

public sealed class PForDeltaDocIdSet : DocIdSet

Properties

Cardinality

Gets the number of documents in this DocIdSet in constant time.

Declaration

public int Cardinality { get; }

Property Value

Type	Description
int

IsCacheable

This method is a hint for CachingWrapperFilter, if this DocIdSet should be cached without copying it. 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 property and return true.

Declaration

public override bool IsCacheable { get; }

Property Value

Type	Description
bool

Overrides

DocIdSet.IsCacheable

Methods

GetIterator()

Provides a DocIdSetIterator to access the set. This implementation can return null if there are no docs that match.

Declaration

public override DocIdSetIterator GetIterator()

Returns

Type	Description
DocIdSetIterator

Overrides

DocIdSet.GetIterator()

RamBytesUsed()

Return the memory usage of this instance.

Declaration

public long RamBytesUsed()

Returns

Type	Description
long