org.apache.lucene.codecs.memory
Class FSTOrdTermsReader

java.lang.Object
  org.apache.lucene.index.Fields
      org.apache.lucene.codecs.FieldsProducer
          org.apache.lucene.codecs.memory.FSTOrdTermsReader

All Implemented Interfaces:

Closeable, Iterable<String>

public class FSTOrdTermsReader
extends FieldsProducer

FST-based terms dictionary reader. The FST index maps each term and its ord, and during seek the ord is used fetch metadata from a single block. The term dictionary is fully memeory resident.

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

Field Summary

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

EMPTY_ARRAY

Constructor Summary

FSTOrdTermsReader(SegmentReadState state, PostingsReaderBase postingsReader)

Method Summary

void	close()
Iterator<String>	iterator()
long	ramBytesUsed()
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

Constructor Detail

FSTOrdTermsReader

public FSTOrdTermsReader(SegmentReadState state,
                         PostingsReaderBase postingsReader)
                  throws IOException

Throws:

IOException

Method Detail

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

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in class FieldsProducer

Throws:

IOException

ramBytesUsed

public long ramBytesUsed()

Specified by:

ramBytesUsed in class FieldsProducer