Examples of org.apache.lucene.search.ScoreCachingWrappingScorer

org.apache.lucene.search.ScoreCachingWrappingScorer
A {@link Scorer} which wraps another scorer and caches the score of thecurrent document. Successive calls to {@link #score()} will return the sameresult and will not invoke the wrapped Scorer's score() method, unless the current document has changed.
This class might be useful due to the changes done to the {@link Collector}interface, in which the score is not computed for a document by default, only if the collector requests it. Some collectors may need to use the score in several places, however all they have in hand is a {@link Scorer} object, andmight end up computing the score of a document more than once.

    }


    @Override public void setScorer(Scorer scorer) throws IOException {
        // always wrap it in a scorer wrapper
        if (!(scorer instanceof ScoreCachingWrappingScorer)) {
            scorer = new ScoreCachingWrappingScorer(scorer);
        }
        collector.setScorer(scorer);
        for (Collector collector : collectors) {
            collector.setScorer(scorer);
        }

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        this.minimumScore = minimumScore;
    }


    @Override public void setScorer(Scorer scorer) throws IOException {
        if (!(scorer instanceof ScoreCachingWrappingScorer)) {
            scorer = new ScoreCachingWrappingScorer(scorer);
        }
        this.scorer = scorer;
        collector.setScorer(scorer);
    }

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  public void setScorer(Scorer scorer) {
    //System.out.println("C.setScorer scorer=" + scorer);
    // Since we invoke .score(), and the comparators likely
    // do as well, cache it so it's only "really" computed
    // once:
    this.scorer = new ScoreCachingWrappingScorer(scorer);
    for (int compIDX = 0; compIDX < comparators.length; compIDX++) {
      comparators[compIDX].setScorer(this.scorer);
    }
    Arrays.fill(joinScorers, null);

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  public void setScorer(Scorer scorer) {
    //System.out.println("C.setScorer scorer=" + scorer);
    // Since we invoke .score(), and the comparators likely
    // do as well, cache it so it's only "really" computed
    // once:
    this.scorer = new ScoreCachingWrappingScorer(scorer);
    for (int compIDX = 0; compIDX < comparators.length; compIDX++) {
      comparators[compIDX].setScorer(this.scorer);
    }
    Arrays.fill(joinScorers, null);

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  public void setScorer(Scorer scorer) {
    //System.out.println("C.setScorer scorer=" + scorer);
    // Since we invoke .score(), and the comparators likely
    // do as well, cache it so it's only "really" computed
    // once:
    this.scorer = new ScoreCachingWrappingScorer(scorer);
    for (int compIDX = 0; compIDX < comparators.length; compIDX++) {
      comparators[compIDX].setScorer(this.scorer);
    }
    Arrays.fill(joinScorers, null);

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Related Classes of org.apache.lucene.search.ScoreCachingWrappingScorer

org.apache.lucene.search.join.BlockJoinCollector

org.apache.lucene.search.join.ToParentBlockJoinCollector

org.elasticsearch.common.lucene.MinimumScoreCollector

org.elasticsearch.common.lucene.MultiCollector

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