Package com.yahoo.search.predicate.index

Class PredicateSearch

java.lang.Object

com.yahoo.search.predicate.index.PredicateSearch

public class PredicateSearch
extends Object

Implementation of the "Interval" predicate search algorithm.

Author:

Magnar Nedland, bjorncs

Constructor Summary

Constructors

Constructor	Description
PredicateSearch(List<PostingList> postingLists, byte[] nPostingListsForDocument, byte[] minFeatureIndex, short[] intervalEnds, int highestIntervalEnd)	Creates a search for a set of posting lists.

Method Summary

Modifier and Type	Method	Description
Stream<Hit>	stream()

Methods inherited from class java.lang.Object

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

Constructor Details

PredicateSearch

public PredicateSearch(List<PostingList> postingLists,
 byte[] nPostingListsForDocument,
 byte[] minFeatureIndex,
 short[] intervalEnds,
 int highestIntervalEnd)

Creates a search for a set of posting lists.

Parameters:

postingLists - Posting lists for the boolean variables that evaluate to true

nPostingListsForDocument - The number of posting list for each docId

minFeatureIndex - Index from docId to min-feature value.

intervalEnds - The interval end for each document.

highestIntervalEnd - The highest end value.

Method Details

stream

public Stream<Hit> stream()

Returns:

A stream of Hit-objects from a lazy evaluation of the boolean search algorithm.