org.apache.lucene.index

Class OwnCacheKeyMultiReader

java.lang.Object

org.apache.lucene.index.IndexReader

org.apache.lucene.index.CompositeReader

org.apache.lucene.index.BaseCompositeReader<IndexReader>

org.apache.lucene.index.MultiReader

org.apache.lucene.index.OwnCacheKeyMultiReader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public final class OwnCacheKeyMultiReader
extends MultiReader

A MultiReader that has its own cache key, occasionally useful for testing purposes.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.index.IndexReader

IndexReader.CacheHelper, IndexReader.CacheKey, IndexReader.ClosedListener

Constructor Summary

Constructors

Constructor and Description
OwnCacheKeyMultiReader(IndexReader... subReaders) Sole constructor.

Method Summary

Modifier and Type	Method and Description
IndexReader.CacheHelper	getReaderCacheHelper() Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this reader.

Methods inherited from class org.apache.lucene.index.MultiReader

doClose

Methods inherited from class org.apache.lucene.index.BaseCompositeReader

docFreq, document, getDocCount, getSequentialSubReaders, getSumDocFreq, getSumTotalTermFreq, getTermVectors, maxDoc, numDocs, readerBase, readerIndex, totalTermFreq

Methods inherited from class org.apache.lucene.index.CompositeReader

getContext, toString

Methods inherited from class org.apache.lucene.index.IndexReader

close, decRef, document, document, ensureOpen, equals, getRefCount, getTermVector, hasDeletions, hashCode, incRef, leaves, numDeletedDocs, registerParentReader, tryIncRef

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

OwnCacheKeyMultiReader

public OwnCacheKeyMultiReader(IndexReader... subReaders)
                       throws java.io.IOException

Sole constructor.

Throws:

java.io.IOException

Method Detail

getReaderCacheHelper

public IndexReader.CacheHelper getReaderCacheHelper()

Description copied from class: IndexReader

Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this reader. Two readers that have different data or different sets of deleted documents will be considered different.

A return value of null indicates that this reader is not suited for caching, which is typically the case for short-lived wrappers that alter the content of the wrapped reader.

Overrides:

getReaderCacheHelper in class MultiReader