Examples with QueryParser org.apache.lucene.queryparser.classic.QueryParser used on opensource projects

Example 66 with QueryParser

use of org.apache.lucene.queryparser.classic.QueryParser in project Anserini by castorini.

the class PyseriniEntryPoint method search.

/**
   * Prints TREC submission file to the standard output stream.
   *
   * @param topics     queries
   * @param similarity similarity
   * @throws IOException
   * @throws ParseException
   */
public Map<String, Float> search(SortedMap<Integer, String> topics, Similarity similarity, int numHits, RerankerCascade cascade, boolean useQueryParser, boolean keepstopwords) throws IOException, ParseException {
    Map<String, Float> scoredDocs = new LinkedHashMap<>();
    IndexSearcher searcher = new IndexSearcher(reader);
    searcher.setSimilarity(similarity);
    EnglishAnalyzer ea = keepstopwords ? new EnglishAnalyzer(CharArraySet.EMPTY_SET) : new EnglishAnalyzer();
    QueryParser queryParser = new QueryParser(FIELD_BODY, ea);
    queryParser.setDefaultOperator(QueryParser.Operator.OR);
    for (Map.Entry<Integer, String> entry : topics.entrySet()) {
        int qID = entry.getKey();
        String queryString = entry.getValue();
        Query query = useQueryParser ? queryParser.parse(queryString) : AnalyzerUtils.buildBagOfWordsQuery(FIELD_BODY, ea, queryString);
        TopDocs rs = searcher.search(query, numHits);
        ScoreDoc[] hits = rs.scoreDocs;
        List<String> queryTokens = AnalyzerUtils.tokenize(ea, queryString);
        RerankerContext context = new RerankerContext(searcher, query, String.valueOf(qID), queryString, queryTokens, FIELD_BODY, null);
        ScoredDocuments docs = cascade.run(ScoredDocuments.fromTopDocs(rs, searcher), context);
        for (int i = 0; i < docs.documents.length; i++) {
            String docid = docs.documents[i].getField(FIELD_ID).stringValue();
            float score = docs.scores[i];
            scoredDocs.put(docid, score);
        }
    }
    return scoredDocs;
}

Example 67 with QueryParser

use of org.apache.lucene.queryparser.classic.QueryParser in project Anserini by castorini.

the class RetrieveSentences method search.

public Map<String, Float> search(SortedMap<Integer, String> topics, int numHits) throws IOException, ParseException {
    IndexSearcher searcher = new IndexSearcher(reader);
    //using BM25 scoring model
    Similarity similarity = new BM25Similarity(0.9f, 0.4f);
    searcher.setSimilarity(similarity);
    EnglishAnalyzer ea = new EnglishAnalyzer();
    QueryParser queryParser = new QueryParser(FIELD_BODY, ea);
    queryParser.setDefaultOperator(QueryParser.Operator.OR);
    Map<String, Float> scoredDocs = new LinkedHashMap<>();
    for (Map.Entry<Integer, String> entry : topics.entrySet()) {
        int qID = entry.getKey();
        String queryString = entry.getValue();
        Query query = AnalyzerUtils.buildBagOfWordsQuery(FIELD_BODY, ea, queryString);
        TopDocs rs = searcher.search(query, numHits);
        ScoreDoc[] hits = rs.scoreDocs;
        ScoredDocuments docs = ScoredDocuments.fromTopDocs(rs, searcher);
        for (int i = 0; i < docs.documents.length; i++) {
            scoredDocs.put(docs.documents[i].getField(FIELD_ID).stringValue(), docs.scores[i]);
        }
    }
    return scoredDocs;
}