Example usage for org.apache.lucene.benchmark.quality QualityStats getRecall

Introduction

In this page you can find the example usage for org.apache.lucene.benchmark.quality QualityStats getRecall.

Prototype

public double getRecall() 

Source Link

Document

Return the recall: |{relevant hits found}| / |{relevant hits existing}|.

Usage

From source file:PrecisionRecall.PrecisionRecallMain.java

public BeanPrecisionRecall caculate() throws Throwable {

    File topicsFile = new File(getTopicsFile());
    File qrelsFile = new File(getQrelsFile());
    Directory dir = FSDirectory.open(new File(getIndexPath()));

    IndexReader reader = DirectoryReader.open(dir);
    IndexSearcher searcher = new IndexSearcher(reader);
    String docNameField = "filename";

    PrintWriter logger = new PrintWriter(System.out, true);

    TrecTopicsReader qReader = new TrecTopicsReader();
    QualityQuery qqs[] = qReader.readQueries(new BufferedReader(new FileReader(topicsFile)));

    Judge judge = new TrecJudge(new BufferedReader(new FileReader(qrelsFile)));

    judge.validateData(qqs, logger);/*ww  w  .j a  va 2s  .c om*/

    QualityQueryParser qqParser = new SimpleQQParser("title", "contents");

    QualityBenchmark qrun = new QualityBenchmark(qqs, qqParser, searcher, docNameField);
    SubmissionReport submitLog = null;

    QualityStats stats[] = qrun.execute(judge, submitLog, logger);

    QualityStats avg = QualityStats.average(stats);

    BeanPrecisionRecall bpr = new BeanPrecisionRecall();

    bpr.setAveragePrecision(avg.getAvp());
    bpr.setMmr(avg.getMRR());
    bpr.setRecall(avg.getRecall());
    bpr.setSearchTime(avg.getSearchTime());

    dir.close();
    return bpr;
}

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