Examples with IdentityReranker io.anserini.rerank.IdentityReranker used on opensource projects

Example 1 with IdentityReranker

use of io.anserini.rerank.IdentityReranker in project Anserini by castorini.

the class PyseriniEntryPoint method search.

public Map<String, Float> search(String query, int numHits) throws IOException, ParseException {
    // for now, using BM25 similarity  - not branching on args.bm25 or args.ql
    float k1 = 0.9f;
    float b = 0.4f;
    Similarity similarity = new BM25Similarity(k1, b);
    // for now, creating Topics map and appending query and setting id=1
    SortedMap<Integer, String> topics = new TreeMap<>();
    int id = 1;
    topics.put(id, query);
    // for now, using IdentityReranker  - not branching on args.rm3
    RerankerCascade cascade = new RerankerCascade();
    cascade.add(new IdentityReranker());
    Map<String, Float> scoredDocs = search(topics, similarity, numHits, cascade, false, false);
    return scoredDocs;
}

Example 2 with IdentityReranker

use of io.anserini.rerank.IdentityReranker in project Anserini by castorini.

the class SearchWebCollection method main.

public static void main(String[] args) throws Exception {
    SearchArgs searchArgs = new SearchArgs();
    CmdLineParser parser = new CmdLineParser(searchArgs, ParserProperties.defaults().withUsageWidth(90));
    try {
        parser.parseArgument(args);
    } catch (CmdLineException e) {
        System.err.println(e.getMessage());
        parser.printUsage(System.err);
        System.err.println("Example: SearchWebCollection" + parser.printExample(OptionHandlerFilter.REQUIRED));
        return;
    }
    LOG.info("Reading index at " + searchArgs.index);
    Directory dir;
    if (searchArgs.inmem) {
        LOG.info("Using MMapDirectory with preload");
        dir = new MMapDirectory(Paths.get(searchArgs.index));
        ((MMapDirectory) dir).setPreload(true);
    } else {
        LOG.info("Using default FSDirectory");
        dir = FSDirectory.open(Paths.get(searchArgs.index));
    }
    Similarity similarity = null;
    if (searchArgs.ql) {
        LOG.info("Using QL scoring model");
        similarity = new LMDirichletSimilarity(searchArgs.mu);
    } else if (searchArgs.bm25) {
        LOG.info("Using BM25 scoring model");
        similarity = new BM25Similarity(searchArgs.k1, searchArgs.b);
    } else {
        LOG.error("Error: Must specify scoring model!");
        System.exit(-1);
    }
    RerankerCascade cascade = new RerankerCascade();
    boolean useQueryParser = false;
    if (searchArgs.rm3) {
        cascade.add(new Rm3Reranker(new EnglishAnalyzer(), FIELD_BODY, "src/main/resources/io/anserini/rerank/rm3/rm3-stoplist.gov2.txt"));
        useQueryParser = true;
    } else {
        cascade.add(new IdentityReranker());
    }
    FeatureExtractors extractors = null;
    if (searchArgs.extractors != null) {
        extractors = FeatureExtractors.loadExtractor(searchArgs.extractors);
    }
    if (searchArgs.dumpFeatures) {
        PrintStream out = new PrintStream(searchArgs.featureFile);
        Qrels qrels = new Qrels(searchArgs.qrels);
        cascade.add(new WebCollectionLtrDataGenerator(out, qrels, extractors));
    }
    Path topicsFile = Paths.get(searchArgs.topics);
    if (!Files.exists(topicsFile) || !Files.isRegularFile(topicsFile) || !Files.isReadable(topicsFile)) {
        throw new IllegalArgumentException("Topics file : " + topicsFile + " does not exist or is not a (readable) file.");
    }
    TopicReader tr = (TopicReader) Class.forName("io.anserini.search.query." + searchArgs.topicReader + "TopicReader").getConstructor(Path.class).newInstance(topicsFile);
    SortedMap<Integer, String> topics = tr.read();
    final long start = System.nanoTime();
    SearchWebCollection searcher = new SearchWebCollection(searchArgs.index);
    searcher.search(topics, searchArgs.output, similarity, searchArgs.hits, cascade, useQueryParser, searchArgs.keepstop);
    searcher.close();
    final long durationMillis = TimeUnit.MILLISECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS);
    LOG.info("Total " + topics.size() + " topics searched in " + DurationFormatUtils.formatDuration(durationMillis, "HH:mm:ss"));
}

Example 3 with IdentityReranker

use of io.anserini.rerank.IdentityReranker in project Anserini by castorini.

the class SearchTimeUtil method main.

public static void main(String[] args) throws IOException, ParseException, ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException, InstantiationException {
    if (args.length != 1) {
        System.err.println("Usage: SearchTimeUtil <indexDir>");
        System.err.println("indexDir: index directory");
        System.exit(1);
    }
    String[] topics = { "topics.web.1-50.txt", "topics.web.51-100.txt", "topics.web.101-150.txt", "topics.web.151-200.txt", "topics.web.201-250.txt", "topics.web.251-300.txt" };
    SearchWebCollection searcher = new SearchWebCollection(args[0]);
    for (String topicFile : topics) {
        Path topicsFile = Paths.get("src/resources/topics-and-qrels/", topicFile);
        TopicReader tr = (TopicReader) Class.forName("io.anserini.search.query." + "Webxml" + "TopicReader").getConstructor(Path.class).newInstance(topicsFile);
        SortedMap<Integer, String> queries = tr.read();
        for (int i = 1; i <= 3; i++) {
            final long start = System.nanoTime();
            String submissionFile = File.createTempFile(topicFile + "_" + i, ".tmp").getAbsolutePath();
            RerankerCascade cascade = new RerankerCascade();
            cascade.add(new IdentityReranker());
            searcher.search(queries, submissionFile, new BM25Similarity(0.9f, 0.4f), 1000, cascade);
            final long durationMillis = TimeUnit.MILLISECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS);
            System.out.println(topicFile + "_" + i + " search completed in " + DurationFormatUtils.formatDuration(durationMillis, "mm:ss:SSS"));
        }
    }
    searcher.close();
}