org.apache.lucene.search

Class QueryUtils.FCInvisibleMultiReader

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.search.QueryUtils.FCInvisibleMultiReader

All Implemented Interfaces:

Closeable, AutoCloseable

Enclosing class:

QueryUtils

public static class QueryUtils.FCInvisibleMultiReader
extends MultiReader

This is a MultiReader that can be used for randomly wrapping other readers without creating FieldCache insanity. The trick is to use an opaque/fake cache key.

Nested Class Summary

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

IndexReader.ReaderClosedListener

Constructor Summary

Constructors

Constructor and Description
FCInvisibleMultiReader(IndexReader... readers)

Method Summary

Modifier and Type	Method and Description
Object	getCombinedCoreAndDeletesKey() Expert: Returns a key for this IndexReader that also includes deletions, so CachingWrapperFilter can find it again.
Object	getCoreCacheKey() Expert: Returns a key for this IndexReader, so CachingWrapperFilter can find it again.

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

FCInvisibleMultiReader

public FCInvisibleMultiReader(IndexReader... readers)
                       throws IOException

Throws:

IOException

Method Detail

getCoreCacheKey

public Object getCoreCacheKey()

Description copied from class: IndexReader

Expert: Returns a key for this IndexReader, so CachingWrapperFilter can find it again. This key must not have equals()/hashCode() methods, so "equals" means "identical".

Overrides:

getCoreCacheKey in class IndexReader

getCombinedCoreAndDeletesKey

public Object getCombinedCoreAndDeletesKey()

Description copied from class: IndexReader

Expert: Returns a key for this IndexReader that also includes deletions, so CachingWrapperFilter can find it again. This key must not have equals()/hashCode() methods, so "equals" means "identical".

Overrides:

getCombinedCoreAndDeletesKey in class IndexReader