Class SortingMergePolicy

A MergePolicy that reorders documents according to a Sort before merging them. As a consequence, all segments resulting from a merge will be sorted while segments resulting from a flush will be in the order in which documents have been added.

NOTE: Never use this policy if you rely on AddDocuments(IEnumerable<IEnumerable<IIndexableField>>, Analyzer) to have sequentially-assigned doc IDs, this policy will scatter doc IDs.

NOTE: This policy should only be used with idempotent Sorts so that the order of segments is predictable. For example, using INDEXORDER in reverse (which is not idempotent) will make the order of documents in a segment depend on the number of times the segment has been merged.

This is a Lucene.NET EXPERIMENTAL API, use at your own risk

Inheritance
System.Object
MergePolicy
SortingMergePolicy
Implements
System.IDisposable
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: Lucene.Net.Index.Sorter
Assembly: Lucene.Net.Misc.dll
Syntax
public sealed class SortingMergePolicy : MergePolicy, IDisposable

Constructors

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SortingMergePolicy(MergePolicy, Sort)

Create a new MergePolicy that sorts documents with the given sort.

Declaration
public SortingMergePolicy(MergePolicy in, Sort sort)
Parameters
Type Name Description
MergePolicy in
Sort sort

Fields

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SORTER_ID_PROP

Put in the Diagnostics to denote that this segment is sorted.

Declaration
public static readonly string SORTER_ID_PROP
Field Value
Type Description
System.String

Methods

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Clone()

Declaration
public override object Clone()
Returns
Type Description
System.Object
Overrides
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Dispose(Boolean)

Declaration
protected override void Dispose(bool disposing)
Parameters
Type Name Description
System.Boolean disposing
Overrides
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FindForcedDeletesMerges(SegmentInfos)

Declaration
public override MergePolicy.MergeSpecification FindForcedDeletesMerges(SegmentInfos segmentInfos)
Parameters
Type Name Description
SegmentInfos segmentInfos
Returns
Type Description
MergePolicy.MergeSpecification
Overrides
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FindForcedMerges(SegmentInfos, Int32, IDictionary<SegmentCommitInfo, Nullable<Boolean>>)

Declaration
public override MergePolicy.MergeSpecification FindForcedMerges(SegmentInfos segmentInfos, int maxSegmentCount, IDictionary<SegmentCommitInfo, bool?> segmentsToMerge)
Parameters
Type Name Description
SegmentInfos segmentInfos
System.Int32 maxSegmentCount
System.Collections.Generic.IDictionary<SegmentCommitInfo, System.Nullable<System.Boolean>> segmentsToMerge
Returns
Type Description
MergePolicy.MergeSpecification
Overrides
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FindMerges(MergeTrigger, SegmentInfos)

Declaration
public override MergePolicy.MergeSpecification FindMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos)
Parameters
Type Name Description
MergeTrigger mergeTrigger
SegmentInfos segmentInfos
Returns
Type Description
MergePolicy.MergeSpecification
Overrides
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IsSorted(AtomicReader, Sort)

Returns true if the given reader is sorted by the specified sort.

Declaration
public static bool IsSorted(AtomicReader reader, Sort sort)
Parameters
Type Name Description
AtomicReader reader
Sort sort
Returns
Type Description
System.Boolean
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SetIndexWriter(IndexWriter)

Declaration
public override void SetIndexWriter(IndexWriter writer)
Parameters
Type Name Description
IndexWriter writer
Overrides
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ToString()

Declaration
public override string ToString()
Returns
Type Description
System.String
Overrides
System.Object.ToString()
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UseCompoundFile(SegmentInfos, SegmentCommitInfo)

Declaration
public override bool UseCompoundFile(SegmentInfos segments, SegmentCommitInfo newSegment)
Parameters
Type Name Description
SegmentInfos segments
SegmentCommitInfo newSegment
Returns
Type Description
System.Boolean
Overrides

Implements

System.IDisposable