Review

13

/home/eko/MUBench/MUBench/checkouts/lucene/1918/original-src/org/apache/lucene/search/payloads/PayloadSpanUtil.java

queryToSpanQuery(Query, Collection)

class PayloadSpanUtil {
  private void queryToSpanQuery(Query query, Collection payloads)
      throws IOException {
    if (query instanceof BooleanQuery) {
      BooleanClause[] queryClauses = ((BooleanQuery) query).getClauses();

      for (int i = 0; i < queryClauses.length; i++) {
        if (!queryClauses[i].isProhibited()) {
          queryToSpanQuery(queryClauses[i].getQuery(), payloads);
        }
      }

    } else if (query instanceof PhraseQuery) {
      Term[] phraseQueryTerms = ((PhraseQuery) query).getTerms();
      SpanQuery[] clauses = new SpanQuery[phraseQueryTerms.length];
      for (int i = 0; i < phraseQueryTerms.length; i++) {
        clauses[i] = new SpanTermQuery(phraseQueryTerms[i]);
      }

      int slop = ((PhraseQuery) query).getSlop();
      boolean inorder = false;

      if (slop == 0) {
        inorder = true;
      }

      SpanNearQuery sp = new SpanNearQuery(clauses, slop, inorder);
      sp.setBoost(query.getBoost());
      getPayloads(payloads, sp);
    } else if (query instanceof TermQuery) {
      SpanTermQuery stq = new SpanTermQuery(((TermQuery) query).getTerm());
      stq.setBoost(query.getBoost());
      getPayloads(payloads, stq);
    } else if (query instanceof SpanQuery) {
      getPayloads(payloads, (SpanQuery) query);
    } else if (query instanceof FilteredQuery) {
      queryToSpanQuery(((FilteredQuery) query).getQuery(), payloads);
    } else if (query instanceof DisjunctionMaxQuery) {

      for (Iterator iterator = ((DisjunctionMaxQuery) query).iterator(); iterator
          .hasNext();) {
        queryToSpanQuery((Query) iterator.next(), payloads);
      }

    } else if (query instanceof MultiPhraseQuery) {
      final MultiPhraseQuery mpq = (MultiPhraseQuery) query;
      final List termArrays = mpq.getTermArrays();
      final int[] positions = mpq.getPositions();
      if (positions.length > 0) {

        int maxPosition = positions[positions.length - 1];
        for (int i = 0; i < positions.length - 1; ++i) {
          if (positions[i] > maxPosition) {
            maxPosition = positions[i];
          }
        }

        final List[] disjunctLists = new List[maxPosition + 1];
        int distinctPositions = 0;

        for (int i = 0; i < termArrays.size(); ++i) {
          final Term[] termArray = (Term[]) termArrays.get(i);
          List disjuncts = disjunctLists[positions[i]];
          if (disjuncts == null) {
            disjuncts = (disjunctLists[positions[i]] = new ArrayList(
                termArray.length));
            ++distinctPositions;
          }
          for (int j = 0; j < termArray.length; ++j) {
            disjuncts.add(new SpanTermQuery(termArray[j]));
          }
        }

        int positionGaps = 0;
        int position = 0;
        final SpanQuery[] clauses = new SpanQuery[distinctPositions];
        for (int i = 0; i < disjunctLists.length; ++i) {
          List disjuncts = disjunctLists[i];
          if (disjuncts != null) {
            clauses[position++] = new SpanOrQuery((SpanQuery[]) disjuncts
                .toArray(new SpanQuery[disjuncts.size()]));
          } else {
            ++positionGaps;
          }
        }

        final int slop = mpq.getSlop();
        final boolean inorder = (slop == 0);

        SpanNearQuery sp = new SpanNearQuery(clauses, slop + positionGaps,
            inorder);
        sp.setBoost(query.getBoost());
        getPayloads(payloads, sp);
      }
    }
  }

}