Package org.apache.lucene.search.uhighlight

Class TermVectorFilteredLeafReader

java.lang.Object

org.apache.lucene.index.IndexReader

org.apache.lucene.index.LeafReader

org.apache.lucene.index.FilterLeafReader

org.apache.lucene.search.uhighlight.TermVectorFilteredLeafReader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

final class TermVectorFilteredLeafReader
extends FilterLeafReader

A filtered LeafReader that only includes the terms that are also in a provided set of terms. Certain methods may be unimplemented or cause large operations on the underlying reader and be slow.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	TermVectorFilteredLeafReader.TermsFilteredTerms
private static class	TermVectorFilteredLeafReader.TermVectorFilteredTermsEnum

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

FilterLeafReader.FilterFields, FilterLeafReader.FilterPostingsEnum, FilterLeafReader.FilterTerms, FilterLeafReader.FilterTermsEnum

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

IndexReader.CacheHelper, IndexReader.CacheKey, IndexReader.ClosedListener

Field Summary

Fields

Modifier and Type	Field	Description
private java.lang.String	fieldFilter
private Terms	filterTerms

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

in

Constructor Summary

Constructors

Constructor	Description
TermVectorFilteredLeafReader(LeafReader baseLeafReader, Terms filterTerms, java.lang.String fieldFilter)	Construct a FilterLeafReader based on the specified base reader.

Method Summary

Modifier and Type	Method	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.
IndexReader.CacheHelper	getReaderCacheHelper()	Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this reader.
Terms	terms(java.lang.String field)	Returns the Terms index for this field, or null if it has none.

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

checkIntegrity, doClose, document, getBinaryDocValues, getDelegate, getFieldInfos, getLiveDocs, getMetaData, getNormValues, getNumericDocValues, getPointValues, getSortedDocValues, getSortedNumericDocValues, getSortedSetDocValues, getTermVectors, maxDoc, numDocs, toString, unwrap

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

Field Detail

filterTerms

private final Terms filterTerms

fieldFilter

private final java.lang.String fieldFilter

Constructor Detail

TermVectorFilteredLeafReader

TermVectorFilteredLeafReader(LeafReader baseLeafReader,
                             Terms filterTerms,
                             java.lang.String fieldFilter)

Construct a FilterLeafReader based on the specified base reader.

Note that base reader is closed if this FilterLeafReader is closed.

Parameters:

baseLeafReader - full/original reader.

filterTerms - set of terms to filter by -- probably from a TermVector or MemoryIndex.

fieldFilter - the field to do this on

Method Detail

terms

public Terms terms(java.lang.String field)
            throws java.io.IOException

Description copied from class: LeafReader

Returns the Terms index for this field, or null if it has none.

Overrides:

terms in class FilterLeafReader

Throws:

java.io.IOException

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