Added batch equivalent of computeQueryDocumentScore

[HAKSOAT]

Addresses #1484

[codecov-commenter]

Codecov Report

Merging #1882 (3e06d73) into master (4430ac4) will increase coverage by 0.06%.
The diff coverage is 77.77%.

@@             Coverage Diff              @@
##             master    #1882      +/-   ##
============================================
+ Coverage     57.74%   57.80%   +0.06%     
- Complexity     1058     1065       +7     
============================================
  Files           179      179              
  Lines         10301    10328      +27     
  Branches       1417     1419       +2     
============================================
+ Hits           5948     5970      +22     
- Misses         3852     3857       +5     
  Partials        501      501              

Impacted Files	Coverage Δ
.../main/java/io/anserini/index/IndexReaderUtils.java	76.89% <77.77%> (+0.10%)	⬆️
...a/io/anserini/analysis/DefaultEnglishAnalyzer.java	78.04% <0.00%> (+2.43%)	⬆️

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[HAKSOAT]

Hi @lintool I'd appreciate a review here when chanced.

[lintool]

Suggesting a better impl.

[lintool]

What you want to do is to move the docids here: In the non-batch impl, the filter clause restricts to a single docid. Here, in the batch impl, you want to restrict to a set of docids - i.e., add multiple sub-clauses in the filter query.

[HAKSOAT]

Hi @lintool I took a look at this and tried testing with a set of documents from robust04. However, I came across the error: org.apache.lucene.search.BooleanQuery$TooManyClauses: maxClauseCount is set to 1024.

This resulted from doing:

    for (String docid: docids){
      // Setting default result value for all docids.
      results.put(docid, 0.0f);
      Query filterQuery = new ConstantScoreQuery(new TermQuery(new Term(IndexArgs.ID, docid)));
      builder.add(filterQuery, BooleanClause.Occur.SHOULD);
    }

What are your thoughts on this?

Am I doing the right thing? I tried this with tests and it works when the clause count is less than 1024.

[HAKSOAT]

Note to @HAKSOAT: Remove these logger imports if not needed in the final implementation.