org.apache.lucene.index

Class SortingCodecReader

java.lang.Object

org.apache.lucene.index.IndexReader

org.apache.lucene.index.LeafReader

org.apache.lucene.index.CodecReader

org.apache.lucene.index.FilterCodecReader

org.apache.lucene.index.SortingCodecReader

All Implemented Interfaces:

Closeable, AutoCloseable, Accountable

public final class SortingCodecReader
extends FilterCodecReader

An CodecReader which supports sorting documents by a given Sort. This can be used to re-sort and index after it's been created by wrapping all readers of the index with this reader and adding it to a fresh IndexWriter via IndexWriter.addIndexes(CodecReader...). NOTE: This reader should only be used for merging. Pulling fields from this reader might be very costly and memory intensive.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Nested Class Summary

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

IndexReader.CacheHelper, IndexReader.CacheKey, IndexReader.ClosedListener

Field Summary

Fields inherited from class org.apache.lucene.index.FilterCodecReader

in

Fields inherited from interface org.apache.lucene.util.Accountable

NULL_ACCOUNTABLE

Method Summary

Modifier and Type	Method and Description
IndexReader.CacheHelper	getCoreCacheHelper() Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this leaf regardless of deletions.
DocValuesProducer	getDocValuesReader() Expert: retrieve underlying DocValuesProducer
StoredFieldsReader	getFieldsReader() Expert: retrieve thread-private StoredFieldsReader
Bits	getLiveDocs() Returns the Bits representing live (not deleted) docs.
LeafMetaData	getMetaData() Return metadata about this leaf.
NormsProducer	getNormsReader() Expert: retrieve underlying NormsProducer
PointsReader	getPointsReader() Expert: retrieve underlying PointsReader
FieldsProducer	getPostingsReader() Expert: retrieve underlying FieldsProducer
IndexReader.CacheHelper	getReaderCacheHelper() Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this reader.
TermVectorsReader	getTermVectorsReader() Expert: retrieve thread-private TermVectorsReader
String	toString()
static CodecReader	wrap(CodecReader reader, Sort sort) Return a sorted view of reader according to the order defined by sort.

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

checkIntegrity, doClose, getChildResources, getDelegate, getFieldInfos, maxDoc, numDocs, ramBytesUsed, unwrap

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

document, getBinaryDocValues, getNormValues, getNumericDocValues, getPointValues, getSortedDocValues, getSortedNumericDocValues, getSortedSetDocValues, getTermVectors, terms

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

docFreq, getContext, getDocCount, getSumDocFreq, getSumTotalTermFreq, postings, postings, totalTermFreq

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

Method Detail

wrap

public static CodecReader wrap(CodecReader reader,
                               Sort sort)
                        throws IOException

Return a sorted view of reader according to the order defined by sort. If the reader is already sorted, this method might return the reader as-is.

Throws:

IOException

getPostingsReader

public FieldsProducer getPostingsReader()

Description copied from class: CodecReader

Expert: retrieve underlying FieldsProducer

Overrides:

getPostingsReader in class FilterCodecReader

getFieldsReader

public StoredFieldsReader getFieldsReader()

Description copied from class: CodecReader

Expert: retrieve thread-private StoredFieldsReader

Overrides:

getFieldsReader in class FilterCodecReader

getLiveDocs

public Bits getLiveDocs()

Description copied from class: LeafReader

Returns the Bits representing live (not deleted) docs. A set bit indicates the doc ID has not been deleted. If this method returns null it means there are no deleted documents (all documents are live). The returned instance has been safely published for use by multiple threads without additional synchronization.

Overrides:

getLiveDocs in class FilterCodecReader

getPointsReader

public PointsReader getPointsReader()

Description copied from class: CodecReader

Expert: retrieve underlying PointsReader

Overrides:

getPointsReader in class FilterCodecReader

getNormsReader

public NormsProducer getNormsReader()

Description copied from class: CodecReader

Expert: retrieve underlying NormsProducer

Overrides:

getNormsReader in class FilterCodecReader

getDocValuesReader

public DocValuesProducer getDocValuesReader()

Description copied from class: CodecReader

Expert: retrieve underlying DocValuesProducer

Overrides:

getDocValuesReader in class FilterCodecReader

getTermVectorsReader

public TermVectorsReader getTermVectorsReader()

Description copied from class: CodecReader

Expert: retrieve thread-private TermVectorsReader

Overrides:

getTermVectorsReader in class FilterCodecReader

toString

public String toString()

Overrides:

toString in class Object

getCoreCacheHelper

public IndexReader.CacheHelper getCoreCacheHelper()

Description copied from class: LeafReader

Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this leaf regardless of deletions. Two readers that have the same data but different sets of deleted documents or doc values updates may be considered equal. Consider using IndexReader.getReaderCacheHelper() if you need deletions or dv updates to be taken into account.

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 leaf reader.

Specified by:

getCoreCacheHelper in class LeafReader

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.

Specified by:

getReaderCacheHelper in class IndexReader

getMetaData

public LeafMetaData getMetaData()

Description copied from class: LeafReader

Return metadata about this leaf.

Overrides:

getMetaData in class FilterCodecReader