/*
* Carrot2 project.
*
* Copyright (C) 2002-2014, Dawid Weiss, Stanisław Osiński.
* All rights reserved.
*
* Refer to the full license file "carrot2.LICENSE"
* in the root folder of the repository checkout or at:
* http://www.carrot2.org/carrot2.LICENSE
*/
package org.carrot2.clustering.stc;
import java.util.ArrayList;
import com.carrotsearch.hppc.BitSet;
import com.google.common.collect.Lists;
/**
* A cluster candidate in the process of building STC clusters.
*/
final class ClusterCandidate
{
/**
* This cluster's score.
*/
float score;
/**
* Indexes of documents this cluster covers.
*/
BitSet documents;
/**
* Pairs of integers denoting a range of indices in {@link GeneralizedSuffixTree.SequenceBuilder#input}
* forming this cluster's label.
*/
final ArrayList<int[]> phrases;
/**
* Cached cardinality of {@link #documents}.
*/
int cardinality;
/* For cluster merging. */
ClusterCandidate()
{
this.phrases = Lists.newArrayList();
this.documents = new BitSet();
}
/* */
ClusterCandidate(int [] phraseIndices, BitSet documents, int cardinality, float score)
{
assert documents.cardinality() == cardinality;
phrases = Lists.newArrayListWithCapacity(1);
phrases.add(phraseIndices);
this.documents = documents;
this.score = score;
this.cardinality = cardinality;
}
}