WSCandidateComparator.java

/*
 * Copyright 2011-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.lucene.analysis.kr.morph;

import java.util.Comparator;
import java.util.List;

public class WSCandidateComparator implements Comparator<WSOutput> {

    public int compare(WSOutput o1, WSOutput o2) {

        int end = o2.getLastEnd() - o1.getLastEnd();
        if (end != 0) return end;

        int s1 = o1.getPhrases().size() == 0 ? Integer.MAX_VALUE : o1.getPhrases().size();
        int s2 = o2.getPhrases().size() == 0 ? Integer.MAX_VALUE : o2.getPhrases().size();

        int size = s1 - s2;
        if (size != 0) return size;

        int score = calculateScore(o2) - calculateScore(o1);
        if (score != 0) return score;

        return 0;
    }

    private int calculateScore(WSOutput o) {

        List<AnalysisOutput> entries = o.getPhrases();

        if (entries.size() == 0) return 0;

        long sum = 0;
        for (AnalysisOutput entry : entries)
            sum += entry.getScore();

        return (int) (sum / entries.size());
    }

}