org.apache.lucene.index

Class MultiSorter

java.lang.Object

org.apache.lucene.index.MultiSorter

final class MultiSorter
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static interface	MultiSorter.ComparableProvider Returns an object for this docID whose .compareTo represents the requested SortField sort order.
private static class	MultiSorter.LeafAndDocID

Constructor Summary

Constructors

Constructor and Description
MultiSorter()

Method Summary

Modifier and Type	Method and Description
private static MultiSorter.ComparableProvider[]	getComparableProviders(java.util.List<CodecReader> readers, SortField sortField) Returns ComparableProviders for the provided readers to represent the requested SortField sort order.
(package private) static MergeState.DocMap[]	sort(Sort sort, java.util.List<CodecReader> readers) Does a merge sort of the leaves of the incoming reader, returning MergeState.DocMap to map each leaf's documents into the merged segment.

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiSorter

MultiSorter()

Method Detail

sort

static MergeState.DocMap[] sort(Sort sort,
                                java.util.List<CodecReader> readers)
                         throws java.io.IOException

Does a merge sort of the leaves of the incoming reader, returning MergeState.DocMap to map each leaf's documents into the merged segment. The documents for each incoming leaf reader must already be sorted by the same sort! Returns null if the merge sort is not needed (segments are already in index sort order).

Throws:

java.io.IOException

getComparableProviders

private static MultiSorter.ComparableProvider[] getComparableProviders(java.util.List<CodecReader> readers,
                                                                       SortField sortField)
                                                                throws java.io.IOException

Returns ComparableProviders for the provided readers to represent the requested SortField sort order.

Throws:

java.io.IOException