org.apache.lucene.search.suggest
Class SortedTermFreqIteratorWrapper

java.lang.Object
  org.apache.lucene.search.suggest.SortedTermFreqIteratorWrapper

All Implemented Interfaces:

TermFreqIterator, BytesRefIterator

public class SortedTermFreqIteratorWrapper
extends Object
implements TermFreqIterator

This wrapper buffers incoming elements and makes sure they are sorted based on given comparator.

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

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.lucene.search.spell.TermFreqIterator

TermFreqIterator.TermFreqIteratorWrapper

Field Summary

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

EMPTY

Constructor Summary

SortedTermFreqIteratorWrapper(TermFreqIterator source)
Creates a new sorted wrapper, using BytesRef.getUTF8SortedAsUnicodeComparator() for sorting.

SortedTermFreqIteratorWrapper(TermFreqIterator source, Comparator<BytesRef> comparator)
Creates a new sorted wrapper, sorting by BytesRef (ascending) then cost (ascending).

Method Summary

protected long	decode(BytesRef scratch, ByteArrayDataInput tmpInput) decodes the weight at the current position
protected void	encode(Sort.ByteSequencesWriter writer, ByteArrayDataOutput output, byte[] buffer, BytesRef spare, long weight) encodes an entry (bytes+weight) to the provided writer
Comparator<BytesRef>	getComparator()
BytesRef	next()
long	weight() A term's weight, higher numbers mean better suggestions.

Methods inherited from class java.lang.Object

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

Constructor Detail

SortedTermFreqIteratorWrapper

public SortedTermFreqIteratorWrapper(TermFreqIterator source)
                              throws IOException

Creates a new sorted wrapper, using BytesRef.getUTF8SortedAsUnicodeComparator() for sorting.

Throws:

IOException

SortedTermFreqIteratorWrapper

public SortedTermFreqIteratorWrapper(TermFreqIterator source,
                                     Comparator<BytesRef> comparator)
                              throws IOException

Creates a new sorted wrapper, sorting by BytesRef (ascending) then cost (ascending).

Throws:

IOException

Method Detail

getComparator

public Comparator<BytesRef> getComparator()

Specified by:

getComparator in interface BytesRefIterator

next

public BytesRef next()
              throws IOException

Specified by:

next in interface BytesRefIterator

Throws:

IOException

weight

public long weight()

Description copied from interface: TermFreqIterator

A term's weight, higher numbers mean better suggestions.

Specified by:

weight in interface TermFreqIterator

encode

protected void encode(Sort.ByteSequencesWriter writer,
                      ByteArrayDataOutput output,
                      byte[] buffer,
                      BytesRef spare,
                      long weight)
               throws IOException

encodes an entry (bytes+weight) to the provided writer

Throws:

IOException

decode

protected long decode(BytesRef scratch,
                      ByteArrayDataInput tmpInput)

decodes the weight at the current position