C# Класс Lucene.Net.Facet.Taxonomy.Directory.DirectoryTaxonomyReader

A TaxonomyReader which retrieves stored taxonomy information from a Directory.

Reading from the on-disk index on every method call is too slow, so this implementation employs caching: Some methods cache recent requests and their results, while other methods prefetch all the data into memory and then provide answers directly from in-memory tables. See the documentation of individual methods for comments on their performance. @lucene.experimental

Наследование: TaxonomyReader, IDisposable

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Private Properties

Свойство	Тип	Описание
DirectoryTaxonomyReader	System
InitTaxoArrays	void

Открытые методы

Метод	Описание
DirectoryTaxonomyReader ( Directory directory ) : System	Open for reading a taxonomy stored in a given Directory.
DirectoryTaxonomyReader ( DirectoryTaxonomyWriter taxoWriter ) : System	Opens a DirectoryTaxonomyReader over the given DirectoryTaxonomyWriter (for NRT).
Dispose ( ) : void
GetOrdinal ( FacetLabel cp ) : int
GetPath ( int ordinal ) : FacetLabel
ToString ( int max ) : string	Returns ordinal -> label mapping, up to the provided max ordinal or number of ordinals, whichever is smaller.

Защищенные методы

Метод	Описание
DoClose ( ) : void
DoOpenIfChanged ( ) : TaxonomyReader	Implements the opening of a new DirectoryTaxonomyReader instance if the taxonomy has changed. NOTE: the returned DirectoryTaxonomyReader shares the ordinal and category caches with this reader. This is not expected to cause any issues, unless the two instances continue to live. The reader guarantees that the two instances cannot affect each other in terms of correctness of the caches, however if the size of the cache is changed through CacheSize, it will affect both reader instances.
OpenIndexReader ( Directory directory ) : DirectoryReader	Open the DirectoryReader from this Directory.
OpenIndexReader ( IndexWriter writer ) : DirectoryReader	Open the DirectoryReader from this IndexWriter.

Приватные методы

Метод	Описание
DirectoryTaxonomyReader ( DirectoryReader indexReader, DirectoryTaxonomyWriter taxoWriter, IntClass>.LRUHashMap ordinalCache, FacetLabel>.LRUHashMap categoryCache, TaxonomyIndexArrays taxoArrays ) : System	Called only from DoOpenIfChanged(). If the taxonomy has been recreated, you should pass `null` as the caches and parent/children arrays.
InitTaxoArrays ( ) : void

Описание методов

DirectoryTaxonomyReader() публичный Метод

Open for reading a taxonomy stored in a given Directory.

if the Taxonomy is corrupt. if another error occurred.

public DirectoryTaxonomyReader ( Directory directory ) : System
directory	System.IO.Directory	The in which the taxonomy resides.
Результат	System

DirectoryTaxonomyReader() публичный Метод

Opens a DirectoryTaxonomyReader over the given DirectoryTaxonomyWriter (for NRT).

public DirectoryTaxonomyReader ( DirectoryTaxonomyWriter taxoWriter ) : System
taxoWriter	DirectoryTaxonomyWriter	/// The from which to obtain newly /// added categories, in real-time.
Результат	System

Dispose() публичный Метод

public Dispose ( ) : void
Результат	void

DoClose() защищенный Метод

protected DoClose ( ) : void
Результат	void

DoOpenIfChanged() защищенный Метод

Implements the opening of a new DirectoryTaxonomyReader instance if the taxonomy has changed.

NOTE: the returned DirectoryTaxonomyReader shares the ordinal and category caches with this reader. This is not expected to cause any issues, unless the two instances continue to live. The reader guarantees that the two instances cannot affect each other in terms of correctness of the caches, however if the size of the cache is changed through CacheSize, it will affect both reader instances.

protected DoOpenIfChanged ( ) : TaxonomyReader
Результат	TaxonomyReader

GetOrdinal() публичный Метод

public GetOrdinal ( FacetLabel cp ) : int
cp	FacetLabel
Результат	int

GetPath() публичный Метод

public GetPath ( int ordinal ) : FacetLabel
ordinal	int
Результат	FacetLabel

OpenIndexReader() защищенный Метод

Open the DirectoryReader from this Directory.

protected OpenIndexReader ( Directory directory ) : DirectoryReader
directory	System.IO.Directory
Результат	DirectoryReader

OpenIndexReader() защищенный Метод

Open the DirectoryReader from this IndexWriter.

protected OpenIndexReader ( IndexWriter writer ) : DirectoryReader
writer	IndexWriter
Результат	DirectoryReader

ToString() публичный Метод

Returns ordinal -> label mapping, up to the provided max ordinal or number of ordinals, whichever is smaller.

public ToString ( int max ) : string
max	int
Результат	string