Examples of org.terrier.matching.CollectionResultSet

org.terrier.matching.CollectionResultSet
This class implements the interface ResultSet and models the set of all documents in the collection. It encapsulates two arrays, one for the docids and one for the scores. It has also the occurrences matrix which counts how many query terms appear in each of the retrieved documents. The metadata related methods are empty.
This class is only used internally by the Matching class and the classes that extent it, because the arrays for the docids and scores contain one entry for each document in the collection. Therefore, the instantiation of an object of this class can be expensive. Access to the retrieved documents is enabled by using the method GetResultSet that returns a cropped result set. @author Vassilis plachouras

    
    plm = new PostingListManager(index, super.collectionStatistics, queryTerms);
    if (MATCH_EMPTY_QUERY && plm.size() == 0)
    {
      // Check whether we need to match an empty query. If so, then return the existing result set.
      resultSet = new CollectionResultSet(collectionStatistics.getNumberOfDocuments());
      resultSet.setExactResultSize(collectionStatistics.getNumberOfDocuments());
      resultSet.setResultSize(collectionStatistics.getNumberOfDocuments());
      return resultSet;
    }
    //DO NOT prepare the posting lists for TAAT retrieval

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    final long starttime = System.currentTimeMillis();
    initialise(queryTerms);
    // Check whether we need to match an empty query. If so, then return the existing result set.
    // String[] queryTermStrings = queryTerms.getTerms();
    if (MATCH_EMPTY_QUERY && queryTermsToMatchList.size() == 0) {
      resultSet = new CollectionResultSet(collectionStatistics.getNumberOfDocuments());
      resultSet.setExactResultSize(collectionStatistics.getNumberOfDocuments());
      resultSet.setResultSize(collectionStatistics.getNumberOfDocuments());
      return resultSet;
    }

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