Examples of org.openrdf.query.algebra.Filter

org.openrdf.query.algebra.Filter
3.org/TR/rdf-sparql-query/#defn_algFilter">SPARQL Query Language for RDF. The FILTER operator filters specific results from the underlying tuple expression based on a configurable condition. @author Arjohn Kampman

      }


      // set the filter conditions on the query pattern
      if (filterConditions.getNumberOfArguments() == 1) {
        // no second argument in the or
        expandedPattern = new Filter(expandedPattern, filterConditions.getArg(0));
      }
      else {
        expandedPattern = new Filter(expandedPattern, filterConditions);
      }


      // expand the query.
      parent.replaceChildNode(statementPattern, expandedPattern);
    }

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    for (TupleExpr optTE : optionalTEs) {
      result = new LeftJoin(result, optTE);
    }


    for (ValueExpr constraint : constraints) {
      result = new Filter(result, constraint);
    }


    return result;
  }

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          // down below other filters to avoid cloning them
          TupleExpr node = findNotFilter(filterArg);


          Union union = new Union();
          for (ValueExpr arg : constraints) {
            union.addArg(new Filter(node.clone(), arg));
          }


          node.replaceWith(union);


          // Enter recursion

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        for (int i = constraints.size() - 1; i >= 0; i--) {
          ValueExpr constraint = constraints.get(i);
          TupleExpr right = node.getRightArg();
          Set<String> filterVars = new VarFinder(constraint).getVars();
          if (right.getBindingNames().containsAll(filterVars)) {
            node.setRightArg(new Filter(right.clone(), constraint.clone()));
          }
          else {
            and.addArg(constraint);
          }
        }

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      getConjunctiveConstraints(filter.getCondition(), conjunctiveConstraints);


      TupleExpr filterArg = filter.getArg();


      for (int i = conjunctiveConstraints.size() - 1; i >= 1; i--) {
        Filter newFilter = new Filter(filterArg, conjunctiveConstraints.get(i));
        filterArg = newFilter;
      }


      filter.setCondition(conjunctiveConstraints.get(0));
      filter.setArg(filterArg);

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        result = new LeftJoin(result, optTE.getTupleExpr());
      }
    }


    for (ValueExpr constraint : constraints) {
      result = new Filter(result, constraint);
    }


    return result;
  }

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      sameTerms.add(new SameTerm(objVar.clone(), resource));
    }


    ValueExpr constraint = new Or(sameTerms);


    result = new Filter(result, constraint);


    ProjectionElemList projElemList = new ProjectionElemList();
    projElemList.addElement(new ProjectionElem(subjVar.getName(), "subject"));
    projElemList.addElement(new ProjectionElem(predVar.getName(), "predicate"));
    projElemList.addElement(new ProjectionElem(objVar.getName(), "object"));

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        TupleExpr tupleExprs = joinTupleExpressions();
        ValueExpr conditions = joinConditions();
        
        return (conditions == null) ?
                tupleExprs :
                new Filter(tupleExprs, conditions);
    }

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        result = new LeftJoin(result, optTE.getTupleExpr());
      }
    }


    for (ValueExpr constraint : constraints) {
      result = new Filter(result, constraint);
    }


    return result;
  }

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      getConjunctiveConstraints(filter.getCondition(), conjunctiveConstraints);


      TupleExpr filterArg = filter.getArg();


      for (int i = conjunctiveConstraints.size() - 1; i >= 1; i--) {
        Filter newFilter = new Filter(filterArg, conjunctiveConstraints.get(i));
        filterArg = newFilter;
      }


      filter.setCondition(conjunctiveConstraints.get(0));
      filter.setArg(filterArg);

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edu.mit.simile.backstage.model.TupleQueryBuilder

org.openrdf.query.algebra.evaluation.impl.ConjunctiveConstraintSplitter$ConstraintVisitor

org.openrdf.query.algebra.evaluation.impl.DisjunctiveConstraintOptimizer$OrSameTermOptimizer

org.openrdf.query.algebra.evaluation.impl.SameTermFilterOptimizer$SameTermFilterVisitor

org.openrdf.query.parser.serql.GraphPattern

org.openrdf.query.parser.sparql.GraphPattern

org.openrdf.query.parser.sparql.TupleExprBuilder

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