org.apache.lucene.codecs.blockterms

Class BlockTermsReader

java.lang.Object

org.apache.lucene.index.Fields

org.apache.lucene.codecs.FieldsProducer

org.apache.lucene.codecs.blockterms.BlockTermsReader

All Implemented Interfaces:

Closeable, Iterable<String>

public class BlockTermsReader
extends FieldsProducer

Handles a terms dict, but decouples all details of doc/freqs/positions reading to an instance of PostingsReaderBase. This class is reusable for codecs that use a different format for docs/freqs/positions (though codecs are also free to make their own terms dict impl).

This class also interacts with an instance of TermsIndexReaderBase, to abstract away the specific implementation of the terms dict index.

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

Field Summary

Fields

Modifier and Type	Field and Description
protected long	dirOffset

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

EMPTY_ARRAY

Constructor Summary

Constructors

Constructor and Description
BlockTermsReader(TermsIndexReaderBase indexReader, Directory dir, FieldInfos fieldInfos, SegmentInfo info, PostingsReaderBase postingsReader, IOContext context, int termsCacheSize, String segmentSuffix)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
Iterator<String>	iterator()
protected void	readHeader(IndexInput input)
protected void	seekDir(IndexInput input, long dirOffset)
int	size()
Terms	terms(String field)

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

getUniqueTermCount

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

dirOffset

protected long dirOffset

Constructor Detail

BlockTermsReader

public BlockTermsReader(TermsIndexReaderBase indexReader,
                Directory dir,
                FieldInfos fieldInfos,
                SegmentInfo info,
                PostingsReaderBase postingsReader,
                IOContext context,
                int termsCacheSize,
                String segmentSuffix)
                 throws IOException

Throws:

IOException

Method Detail

readHeader

protected void readHeader(IndexInput input)
                   throws IOException

Throws:

IOException

seekDir

protected void seekDir(IndexInput input,
           long dirOffset)
                throws IOException

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in class FieldsProducer

Throws:

IOException

iterator

public Iterator<String> iterator()

Specified by:

iterator in interface Iterable<String>

Specified by:

iterator in class Fields

terms

public Terms terms(String field)
            throws IOException

Specified by:

terms in class Fields

Throws:

IOException

size

public int size()

Specified by:

size in class Fields