Class MultiFields

Exposes flex API, merged from flex API of sub-segments. This is useful when you're interacting with an IndexReader implementation that consists of sequential sub-readers (eg DirectoryReader or MultiReader).

NOTE: for composite readers, you'll get better performance by gathering the sub readers using Context to get the atomic leaves and then operate per-AtomicReader, instead of using this class.

@lucene.experimental

Inheritance
System.Object
Fields
MultiFields
Inherited Members
Assembly: DistributedLucene.Net.dll
Syntax
public sealed class MultiFields : Fields

Constructors

Name Description
MultiFields(Fields[], ReaderSlice[])

Expert: construct a new MultiFields instance directly.

@lucene.internal

Properties

Name Description
Count

Methods

Name Description
GetEnumerator()
GetFields(IndexReader)

Returns a single Fields instance for this reader, merging fields/terms/docs/positions on the fly. This method will return null if the reader has no postings.

NOTE: this is a slow way to access postings. It's better to get the sub-readers and iterate through them yourself.
GetIndexedFields(IndexReader)

Call this to get the (merged) FieldInfos representing the set of indexed fields only for a composite reader.

NOTE: the returned field numbers will likely not correspond to the actual field numbers in the underlying readers, and codec metadata (GetAttribute(String)) will be unavailable.
GetLiveDocs(IndexReader)

Returns a single IBits instance for this reader, merging live Documents on the fly. This method will return null if the reader has no deletions.

NOTE: this is a very slow way to access live docs. For example, each IBits access will require a binary search. It's better to get the sub-readers and iterate through them yourself.
GetMergedFieldInfos(IndexReader)

Call this to get the (merged) FieldInfos for a composite reader.

NOTE: the returned field numbers will likely not correspond to the actual field numbers in the underlying readers, and codec metadata (GetAttribute(String)) will be unavailable.
GetTermDocsEnum(IndexReader, IBits, String, BytesRef)

Returns DocsEnum for the specified field & term. This will return null if the field or term does not exist.
GetTermDocsEnum(IndexReader, IBits, String, BytesRef, DocsFlags)

Returns DocsEnum for the specified field & term, with control over whether freqs are required. Some codecs may be able to optimize their implementation when freqs are not required. This will return null if the field or term does not exist. See Docs(IBits, DocsEnum, DocsFlags).
GetTermPositionsEnum(IndexReader, IBits, String, BytesRef)

Returns DocsAndPositionsEnum for the specified field & term. This will return null if the field or term does not exist or positions were not indexed.

GetTermPositionsEnum(IndexReader, IBits, String, BytesRef, DocsAndPositionsFlags)

Returns DocsAndPositionsEnum for the specified field & term, with control over whether offsets and payloads are required. Some codecs may be able to optimize their implementation when offsets and/or payloads are not required. This will return null if the field or term does not exist or positions were not indexed. See DocsAndPositions(IBits, DocsAndPositionsEnum, DocsAndPositionsFlags).
GetTerms(IndexReader, String)

this method may return null if the field does not exist.

GetTerms(String)

Extension Methods