Package org.openrdf.query.algebra

Examples of org.openrdf.query.algebra.TupleExpr.clone()

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      }
      else if (joinArg instanceof Join || distinct) {
        // Local join with multiple owners or distinct federation members
        Union union = new Union();
        for (SignedConnection owner : owners) {
          union.addArg(new OwnedTupleExpr(owner, joinArg.clone()));
        }
        replacement.addArg(union);
      }
      else {
        replacement.addArg(joinArg);
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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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