Examples of BM25Similarity

org.apache.lucene.search.similarities.BM25Similarity
BM25 Similarity. Introduced in Stephen E. Robertson, Steve Walker, Susan Jones, Micheline Hancock-Beaulieu, and Mike Gatford. Okapi at TREC-3. In Proceedings of the Third Text REtrieval Conference (TREC 1994). Gaithersburg, USA, November 1994. @lucene.experimental

Examples of org.apache.lucene.search.similarities.BM25Similarity


  public SearchResults BM25search(String query, int limit) 
  throws CorruptIndexException, IOException {
    
    // Score
    BM25Similarity similarity = new BM25Similarity();    
    BasicSimilarityProvider similarityProvider = new BasicSimilarityProvider(similarity);
    this.setSimilarityProvider(similarityProvider);
    
    return this.search(query, limit);
  }

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Examples of org.apache.lucene.search.similarities.BM25Similarity


    IndexReader reader = DirectoryReader.open(FSDirectory.open(indexLocation));
    IndexSearcher searcher = new IndexSearcher(reader);


    if (similarity.equalsIgnoreCase("BM25")) {
      Similarity simBM25 = new BM25Similarity();
      searcher.setSimilarity(simBM25);
    } else if (similarity.equalsIgnoreCase("LM")) {
      NamedList<Double> paramNamedList = new NamedList<Double>();
      paramNamedList.add("mu", 2500.0);
      SolrParams params = SolrParams.toSolrParams(paramNamedList);

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Examples of org.apache.lucene.search.similarities.BM25Similarity


    IndexReader reader = DirectoryReader.open(FSDirectory.open(indexLocation));
    IndexSearcher searcher = new IndexSearcher(reader);


    if (similarity.equalsIgnoreCase("BM25")) {
      Similarity simBM25 = new BM25Similarity();
      searcher.setSimilarity(simBM25);
    } else if (similarity.equalsIgnoreCase("LM")) {
      NamedList<Double> paramNamedList = new NamedList<Double>();
      paramNamedList.add("mu", 2500.0);
      SolrParams params = SolrParams.toSolrParams(paramNamedList);

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Examples of org.apache.lucene.search.similarities.BM25Similarity


    IndexReader reader = DirectoryReader.open(FSDirectory.open(indexLocation));
    IndexSearcher searcher = new IndexSearcher(reader);


    if (similarity.equalsIgnoreCase("BM25")) {
      Similarity simBM25 = new BM25Similarity();
      searcher.setSimilarity(simBM25);
    } else if (similarity.equalsIgnoreCase("LM")) {
      NamedList<Double> paramNamedList = new NamedList<Double>();
      paramNamedList.add("mu", 2500.0);
      SolrParams params = SolrParams.toSolrParams(paramNamedList);

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Examples of org.apache.lucene.search.similarities.BM25Similarity


    IndexReader reader = DirectoryReader.open(FSDirectory.open(indexLocation));
    IndexSearcher searcher = new IndexSearcher(reader);


    if (similarity.equalsIgnoreCase("BM25")) {
      Similarity simBM25 = new BM25Similarity();
      searcher.setSimilarity(simBM25);
    } else if (similarity.equalsIgnoreCase("LM")) {
      NamedList<Double> paramNamedList = new NamedList<Double>();
      paramNamedList.add("mu", 2500.0);
      SolrParams params = SolrParams.toSolrParams(paramNamedList);

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Examples of org.apache.lucene.search.similarities.BM25Similarity


    IndexReader reader = DirectoryReader.open(FSDirectory.open(indexLocation));
    IndexSearcher searcher = new IndexSearcher(reader);


    if (similarity.equalsIgnoreCase("BM25")) {
      searcher.setSimilarity(new BM25Similarity());
    } else if (similarity.equalsIgnoreCase("LM")) {
      searcher.setSimilarity(new LMDirichletSimilarity(2500.0f));
    }


    QueryParser p = new QueryParser(Version.LUCENE_43, StatusField.TEXT.name,

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Examples of org.apache.lucene.search.similarities.BM25Similarity


    IndexReader reader = DirectoryReader.open(FSDirectory.open(indexLocation));
    IndexSearcher searcher = new IndexSearcher(reader);


    if (similarity.equalsIgnoreCase("BM25")) {
      searcher.setSimilarity(new BM25Similarity());
    } else if (similarity.equalsIgnoreCase("LM")) {
      searcher.setSimilarity(new LMDirichletSimilarity(2500.0f));
    }


    QueryParser p = new QueryParser(Version.LUCENE_43, IndexStatuses.StatusField.TEXT.name, IndexStatuses.ANALYZER);

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Examples of org.apache.lucene.search.similarities.BM25Similarity

  public void runQueries() throws IOException {
    IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(pathToIndex)));
    searcher = new IndexSearcher(reader);


    if (similarity.equalsIgnoreCase("bm25")) {
      Similarity simBM25 = new BM25Similarity();
      searcher.setSimilarity(simBM25);
    } else if (similarity.equalsIgnoreCase("lm")) {
      NamedList<Double> paramNamedList = new NamedList<Double>();
      paramNamedList.add("mu", 2500.0);
      SolrParams params = SolrParams.toSolrParams(paramNamedList);

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Examples of org.apache.lucene.search.similarities.BM25Similarity


    IndexReader reader = DirectoryReader.open(FSDirectory.open(indexLocation));
    IndexSearcher searcher = new IndexSearcher(reader);


    if (similarity.equalsIgnoreCase("BM25")) {
      Similarity simBM25 = new BM25Similarity();
      searcher.setSimilarity(simBM25);
    } else if (similarity.equalsIgnoreCase("LM")) {
      NamedList<Double> paramNamedList = new NamedList<Double>();
      paramNamedList.add("mu", 2500.0);
      SolrParams params = SolrParams.toSolrParams(paramNamedList);

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Examples of org.apache.lucene.search.similarities.BM25Similarity

        }
        return terms;
    }


    public IndexSearcher setSimilarity(IndexSearcher searcher) {
        Similarity similarity = random().nextBoolean() ? new BM25Similarity() : new DefaultSimilarity();
        searcher.setSimilarity(similarity);
        return searcher;
    }

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