org.apache.lucene.facet.util

Class ScoredDocIdsUtils

java.lang.Object

org.apache.lucene.facet.util.ScoredDocIdsUtils

public class ScoredDocIdsUtils
extends Object

Utility methods for Scored Doc IDs.

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

Constructor Summary

Constructors

Constructor and Description
ScoredDocIdsUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static ScoredDocIDs	createAllDocsScoredDocIDs(IndexReader reader) Creates a ScoredDocIDs which returns document IDs all non-deleted doc ids according to the given reader.
static ScoredDocIDs	createScoredDocIds(DocIdSet docIdSet, int maxDoc) Create a ScoredDocIDs out of a given docIdSet and the total number of documents in an index
static ScoredDocIDs	createScoredDocIDsSubset(ScoredDocIDs allDocIds, int[] sampleSet) Create a subset of an existing ScoredDocIDs object.
static ScoredDocIDs	getComplementSet(ScoredDocIDs docids, IndexReader reader) Create a complement of the input set.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScoredDocIdsUtils

public ScoredDocIdsUtils()

Method Detail

getComplementSet

public static final ScoredDocIDs getComplementSet(ScoredDocIDs docids,
                            IndexReader reader)
                                           throws IOException

Create a complement of the input set. The returned ScoredDocIDs does not contain any scores, which makes sense given that the complementing documents were not scored. Note: the complement set does NOT contain doc ids which are noted as deleted by the given reader

Parameters:

docids - to be complemented.

reader - holding the number of documents & information about deletions.

Throws:

IOException

createScoredDocIDsSubset

public static final ScoredDocIDs createScoredDocIDsSubset(ScoredDocIDs allDocIds,
                                    int[] sampleSet)
                                                   throws IOException

Create a subset of an existing ScoredDocIDs object.

Parameters:

allDocIds - orginal set

sampleSet - Doc Ids of the subset.

Throws:

IOException

createAllDocsScoredDocIDs

public static final ScoredDocIDs createAllDocsScoredDocIDs(IndexReader reader)

Creates a ScoredDocIDs which returns document IDs all non-deleted doc ids according to the given reader. The returned set contains the range of [0 .. reader.maxDoc ) doc ids

createScoredDocIds

public static final ScoredDocIDs createScoredDocIds(DocIdSet docIdSet,
                              int maxDoc)

Create a ScoredDocIDs out of a given docIdSet and the total number of documents in an index