Examples of com.hp.hpl.jena.sparql.algebra.op.OpConditional

Package com.hp.hpl.jena.sparql.algebra.op

Examples of com.hp.hpl.jena.sparql.algebra.op.OpConditional

com.hp.hpl.jena.sparql.algebra.op.OpConditional
Conditional execution - works with streamed execution and is known to safe to evaluate that way (no issues from nested optionals). For each element in the input stream, execute the expression (i.e. index-join it to the element in the input stream). If it matches, return those results. If it does not, return the input stream element.

        // Any filters that depend on no variables. 
        Op op = insertAnyFilter(exprs, varScope, null) ;
        Op left = opConditional.getLeft();
        left = transform(exprs, varScope, left);
        Op right = opConditional.getRight();
        op = new OpConditional(left, right);
        op = insertAnyFilter(exprs, varScope, op);
        return op;
     }

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        // Any filters that depend on no variables.
        Op op = insertAnyFilter(exprs, varScope, null);
        Op left = opConditional.getLeft();
        left = transform(exprs, varScope, left);
        Op right = opConditional.getRight();
        op = new OpConditional(left, right);
        op = insertAnyFilter(exprs, varScope, op);
        return op;
    }

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        // Any filters that depend on no variables. 
        Op op = insertAnyFilter(exprs, varScope, null) ;
        Op left = opConditional.getLeft();
        left = transform(exprs, varScope, left);
        Op right = opConditional.getRight();
        op = new OpConditional(left, right);
        op = insertAnyFilter(exprs, varScope, op);
        return op;
     }

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        // Any filters that depend on no variables. 
        Op op = insertAnyFilter(exprs, varScope, null) ;
        Op left = opConditional.getLeft();
        left = transform(exprs, varScope, left);
        Op right = opConditional.getRight();
        op = new OpConditional(left, right);
        op = insertAnyFilter(exprs, varScope, op);
        return op;
     }

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        // Any filters that depend on no variables. 
        Op op = insertAnyFilter(exprs, varScope, null) ;
        Op left = opConditional.getLeft();
        left = transform(exprs, varScope, left);
        Op right = opConditional.getRight();
        op = new OpConditional(left, right);
        op = insertAnyFilter(exprs, varScope, op);
        return op;
     }

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        if ( op instanceof OpSequence ) return true ;


        // Not safe unless filter is on the RHS. 
        if ( op instanceof OpConditional )
        {
            OpConditional opCond = (OpConditional)op ;
            Op opLeft = opCond.getLeft() ;
            
            Set<Var> x = OpVars.patternVars(opLeft) ;
            Set<Var> y = ExprVars.getVarsMentioned(exprs) ;
            if ( x.containsAll(y) )
                return true ;

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          // RHS execution so the expression is evaluated by moving it to be 
          // a filter over the RHS pattern. 
          
          if (opLeftJoin.getExprs() != null )
              opRight = OpFilter.filter(opLeftJoin.getExprs(), opRight) ;
          return new OpConditional(opLeft, opRight) ;
      }


      // Not index-able. 
      return super.transform(opLeftJoin, opLeft, opRight) ;
    }

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   */
  @Override
  public void visit( final OpConditional opCondition )
  {
    final OpRewriter rewriter = new OpRewriter(securityEvaluator, graphIRI);
    addOp(new OpConditional(rewriteOp2(opCondition, rewriter),
        rewriter.getResult()));
  }

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        // Any filters that depend on no variables.
        Op op = insertAnyFilter(exprs, varScope, null);
        Op left = opConditional.getLeft();
        left = transform(exprs, varScope, left);
        Op right = opConditional.getRight();
        op = new OpConditional(left, right);
        op = insertAnyFilter(exprs, varScope, op);
        return op;
    }

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        // Any filters that depend on no variables. 
        Op op = insertAnyFilter(exprs, varScope, null) ;
        Op left = opConditional.getLeft();
        left = transform(exprs, varScope, left);
        Op right = opConditional.getRight();
        op = new OpConditional(left, right);
        op = insertAnyFilter(exprs, varScope, op);
        return op;
     }

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Related Classes of com.hp.hpl.jena.sparql.algebra.op.OpConditional

com.hp.hpl.jena.sparql.algebra.optimize.TransformFilterEquality

com.hp.hpl.jena.sparql.algebra.optimize.TransformFilterPlacement

com.hp.hpl.jena.sparql.algebra.optimize.TransformFilterPlacement_Old

com.hp.hpl.jena.sparql.algebra.optimize.TransformFilterPlacementConservative

com.hp.hpl.jena.sparql.algebra.optimize.TransformJoinStrategy

org.apache.jena.security.query.rewriter.OpRewriter

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