Java Explanation.isMatch方法代碼示例

import org.apache.lucene.search.Explanation; //導入方法依賴的package包/類
@Override
public Explanation explain(LeafReaderContext context, int doc) throws IOException {
    Explanation subQueryExpl = subQueryWeight.explain(context, doc);
    if (!subQueryExpl.isMatch()) {
        return subQueryExpl;
    }
    Explanation expl;
    if (function != null) {
        Explanation functionExplanation = function.getLeafScoreFunction(context).explainScore(doc, subQueryExpl);
        expl = combineFunction.explain(subQueryExpl, functionExplanation, maxBoost);
    } else {
        expl = subQueryExpl;
    }
    if (minScore != null && minScore > expl.getValue()) {
        expl = Explanation.noMatch("Score value is too low, expected at least " + minScore + " but got " + expl.getValue(), expl);
    }
    return expl;
}
 

import org.apache.lucene.search.Explanation; //導入方法依賴的package包/類
@Override
public Explanation explain(int topLevelDocId, SearchContext context, RescoreSearchContext rescoreContext,
                           Explanation sourceExplanation) throws IOException {
    QueryRescoreContext rescore = (QueryRescoreContext) rescoreContext;
    ContextIndexSearcher searcher = context.searcher();
    if (sourceExplanation == null) {
        // this should not happen but just in case
        return Explanation.noMatch("nothing matched");
    }
    // TODO: this isn't right?  I.e., we are incorrectly pretending all first pass hits were rescored?  If the requested docID was
    // beyond the top rescoreContext.window() in the first pass hits, we don't rescore it now?
    Explanation rescoreExplain = searcher.explain(rescore.query(), topLevelDocId);
    float primaryWeight = rescore.queryWeight();

    Explanation prim;
    if (sourceExplanation.isMatch()) {
        prim = Explanation.match(
                sourceExplanation.getValue() * primaryWeight,
                "product of:", sourceExplanation, Explanation.match(primaryWeight, "primaryWeight"));
    } else {
        prim = Explanation.noMatch("First pass did not match", sourceExplanation);
    }

    // NOTE: we don't use Lucene's Rescorer.explain because we want to insert our own description with which ScoreMode was used.  Maybe
    // we should add QueryRescorer.explainCombine to Lucene?
    if (rescoreExplain != null && rescoreExplain.isMatch()) {
        float secondaryWeight = rescore.rescoreQueryWeight();
        Explanation sec = Explanation.match(
                rescoreExplain.getValue() * secondaryWeight,
                "product of:",
                rescoreExplain, Explanation.match(secondaryWeight, "secondaryWeight"));
        QueryRescoreMode scoreMode = rescore.scoreMode();
        return Explanation.match(
                scoreMode.combine(prim.getValue(), sec.getValue()),
                scoreMode + " of:",
                prim, sec);
    } else {
        return prim;
    }
}
 

import org.apache.lucene.search.Explanation; //導入方法依賴的package包/類
public static void writeExplanation(StreamOutput out, Explanation explanation) throws IOException {
    out.writeBoolean(explanation.isMatch());
    out.writeString(explanation.getDescription());
    Explanation[] subExplanations = explanation.getDetails();
    out.writeVInt(subExplanations.length);
    for (Explanation subExp : subExplanations) {
        writeExplanation(out, subExp);
    }
    if (explanation.isMatch()) {
        out.writeFloat(explanation.getValue());
    }
}
 

import org.apache.lucene.search.Explanation; //導入方法依賴的package包/類
@Override
public Explanation explain(int topLevelDocId, SearchContext context, RescoreSearchContext rescoreContext,
                           Explanation sourceExplanation) throws IOException {
    QueryRescoreContext rescore = (QueryRescoreContext) rescoreContext;
    ContextIndexSearcher searcher = context.searcher();
    if (sourceExplanation == null) {
        // this should not happen but just in case
        return Explanation.noMatch("nothing matched");
    }
    // TODO: this isn't right?  I.e., we are incorrectly pretending all first pass hits were rescored?  If the requested docID was
    // beyond the top rescoreContext.window() in the first pass hits, we don't rescore it now?
    Explanation rescoreExplain = searcher.explain(rescore.query(), topLevelDocId);
    float primaryWeight = rescore.queryWeight();

    Explanation prim;
    if (sourceExplanation.isMatch()) {
        prim = Explanation.match(
                sourceExplanation.getValue() * primaryWeight,
                "product of:", sourceExplanation, Explanation.match(primaryWeight, "primaryWeight"));
    } else {
        prim = Explanation.noMatch("First pass did not match", sourceExplanation);
    }

    // NOTE: we don't use Lucene's Rescorer.explain because we want to insert our own description with which ScoreMode was used.  Maybe
    // we should add QueryRescorer.explainCombine to Lucene?
    if (rescoreExplain != null && rescoreExplain.isMatch()) {
        float secondaryWeight = rescore.rescoreQueryWeight();
        Explanation sec = Explanation.match(
                rescoreExplain.getValue() * secondaryWeight,
                "product of:",
                rescoreExplain, Explanation.match(secondaryWeight, "secondaryWeight"));
        ScoreMode scoreMode = rescore.scoreMode();
        return Explanation.match(
                scoreMode.combine(prim.getValue(), sec.getValue()),
                scoreMode + " of:",
                prim, sec);
    } else {
        return prim;
    }
}