예제 #1
0
      @Override
      public Query apply(Function input, Context context) throws IOException {
        List<Symbol> arguments = input.arguments();
        assert arguments.size() == 4 : "invalid number of arguments";
        assert Symbol.isLiteral(arguments.get(0), DataTypes.OBJECT);
        assert Symbol.isLiteral(arguments.get(1), DataTypes.STRING);
        assert Symbol.isLiteral(arguments.get(2), DataTypes.STRING);
        assert Symbol.isLiteral(arguments.get(3), DataTypes.OBJECT);

        @SuppressWarnings("unchecked")
        Map<String, Object> fields = (Map) ((Literal) arguments.get(0)).value();
        BytesRef queryString = (BytesRef) ((Literal) arguments.get(1)).value();
        BytesRef matchType = (BytesRef) ((Literal) arguments.get(2)).value();
        Map options = (Map) ((Literal) arguments.get(3)).value();

        checkArgument(queryString != null, "cannot use NULL as query term in match predicate");

        MatchQueryBuilder queryBuilder;
        if (fields.size() == 1) {
          queryBuilder =
              new MatchQueryBuilder(context.mapperService, context.indexCache, matchType, options);
        } else {
          queryBuilder =
              new MultiMatchQueryBuilder(
                  context.mapperService, context.indexCache, matchType, options);
        }
        return queryBuilder.query(fields, queryString);
      }
예제 #2
0
    private static Filter genericFunctionFilter(Function function, Context context) {
      if (function.valueType() != DataTypes.BOOLEAN) {
        raiseUnsupported(function);
      }
      // avoid field-cache
      // reason1: analyzed columns or columns with index off wouldn't work
      //   substr(n, 1, 1) in the case of n => analyzed would throw an error because n would be an
      // array
      // reason2: would have to load each value into the field cache
      function = (Function) DocReferenceConverter.convertIf(function);

      final CollectInputSymbolVisitor.Context ctx =
          context.inputSymbolVisitor.extractImplementations(function);
      assert ctx.topLevelInputs().size() == 1;
      @SuppressWarnings("unchecked")
      final Input<Boolean> condition = (Input<Boolean>) ctx.topLevelInputs().get(0);
      @SuppressWarnings("unchecked")
      final List<LuceneCollectorExpression> expressions = ctx.docLevelExpressions();
      final CollectorContext collectorContext =
          new CollectorContext(
              context.mapperService,
              context.fieldDataService,
              new CollectorFieldsVisitor(expressions.size()));

      for (LuceneCollectorExpression expression : expressions) {
        expression.startCollect(collectorContext);
      }
      return new Filter() {
        @Override
        public DocIdSet getDocIdSet(AtomicReaderContext context, Bits acceptDocs)
            throws IOException {
          for (LuceneCollectorExpression expression : expressions) {
            expression.setNextReader(context.reader().getContext());
          }
          return BitsFilteredDocIdSet.wrap(
              new FunctionDocSet(
                  context.reader(),
                  collectorContext.visitor(),
                  condition,
                  expressions,
                  context.reader().maxDoc(),
                  acceptDocs),
              acceptDocs);
        }
      };
    }