Package com.hp.hpl.jena.sparql.expr

Examples of com.hp.hpl.jena.sparql.expr.ExprList

351
352
353
354
355
356
357
358
359
360
361
     * different scope, which is a different variable with the same name in the
     * orginal query).
     */

    private Placement placeSequence(ExprList exprsIn, OpSequence opSequence) {
        ExprList exprs = ExprList.copy(exprsIn) ;
        Set<Var> varScope = DS.set() ;
        List<Op> ops = opSequence.getElements() ;

        Op op = null ;
        for (int i = 0 ; i < ops.size() ; i++ ) {
View Full Code Here
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
    private Placement placeJoin(ExprList exprs, OpJoin opJoin) {
        Op left = opJoin.getLeft() ;
        Op right = opJoin.getRight() ;
        Collection<Var> leftVars = fixedVars(left) ;
        Collection<Var> rightVars = fixedVars(right) ;
        ExprList unpushed = new ExprList() ;
        ExprList pushLeft = new ExprList() ;
        ExprList pushRight = new ExprList() ;

        for (Expr expr : exprs) {
            Set<Var> vars = expr.getVarsMentioned() ;
            boolean pushed = false ;

            if ( leftVars.containsAll(vars) ) {
                pushLeft.add(expr) ;
                pushed = true ;
            }
           
            if ( pushed && ! pushRightAsWellAsLeft )
                continue ;
            // If left only, make this "else if" of left test, remove "continue"
            if ( rightVars.containsAll(vars) ) {
                // Push right
                pushRight.add(expr) ;
                pushed = true ;
            }

            if ( !pushed )
                unpushed.add(expr) ;
        }

        if ( pushLeft.isEmpty() && pushRight.isEmpty() )
            return null ;

        Op opLeftNew = left ;
        if ( !pushLeft.isEmpty() )
            opLeftNew = transformOpAlways(pushLeft, opLeftNew) ;

        Op opRightNew = right ;
        if ( !pushRight.isEmpty() )
            opRightNew = transformOpAlways(pushRight, opRightNew) ;

        Op op = OpJoin.create(opLeftNew, opRightNew) ;
        return result(op, unpushed) ;
    }
View Full Code Here
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
        // in but needs to be redone for the other arm as if it were no placed at all.
       
        // A filter applied twice is safe.
        // Placement = null => nothing done => unplaced.
       
        ExprList exprs2 = null ;
       
        for ( Expr expr : exprs ) {
            boolean unplacedLeft =  ( pLeft == null  || pLeft.unplaced.getList().contains(expr) ) ;
            boolean unplacedRight = ( pRight == null || pRight.unplaced.getList().contains(expr) ) ;
           
//            if ( unplacedLeft && unplacedRight ) {
//                System.out.println("Unplaced:     "+expr) ;
//            } else if ( unplacedLeft ) {
//                System.out.println("Unplaced(L):  "+expr) ;
//            } else if ( unplacedRight ) {
//                System.out.println("Unplaced(R):  "+expr) ;
//            } else
//                System.out.println("Placed(L+R):  "+expr) ;
           
            boolean placed = !unplacedLeft && !unplacedRight ;
            if ( placed )
                // Went into both arms - expression has been handled completely.
                continue ;
           
            if ( exprs2 == null )
                exprs2 = new ExprList() ;
            exprs2.add(expr) ;
        }
       
       
        Op newLeft = (pLeft == null ) ? left : pLeft.op ;
        Op newRight = (pRight == null ) ? right : pRight.op ;
View Full Code Here
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
    }

    private Placement processExtendAssign(ExprList exprs, OpExtendAssign input) {
        // Could break up the VarExprList
        Collection<Var> vars1 = input.getVarExprList().getVars() ;
        ExprList pushed = new ExprList() ;
        ExprList unpushed = new ExprList() ;
       
        for ( Expr expr : exprs ) {
            Set<Var> exprVars = expr.getVarsMentioned() ;
            if ( disjoint(vars1, exprVars) )
                pushed.add(expr);
            else
                unpushed.add(expr) ;
        }
               
        if ( pushed.isEmpty() )
            return resultNoChange(input) ;
       
        // (filter ... (extend ... ))
        //   ===>
        // (extend ... (filter ... ))
        Op opSub = input.getSubOp() ;
       
        // And try down the expressions
        Placement p = transform(pushed, opSub) ;

        if ( p == null ) {
            // Couldn't place an filter expressions.  Do nothing.
            return null ;
        }
       
        if ( ! p.unplaced.isEmpty() )
            // Some placed, not all.
            // Pass back out all untouched expressions.
            unpushed.addAll(p.unplaced) ;
        Op op1 = input.copy(p.op) ;
       
        return result(op1, unpushed) ;
    }
View Full Code Here
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
        return result(op1, unpushed) ;
    }

    private Placement placeProject(ExprList exprs, OpProject input) {
        Collection<Var> varsProject = input.getVars() ;
        ExprList pushed = new ExprList() ;
        ExprList unpushed = new ExprList() ;
       
        for ( Expr expr : exprs ) {
            Set<Var> exprVars = expr.getVarsMentioned() ;
            if ( varsProject.containsAll(exprVars) )
                pushed.add(expr);
            else
                unpushed.add(expr) ;
        }
        if ( pushed.isEmpty() )
            return resultNoChange(input) ;
        // (filter (project ...)) ===> (project (filter ...))
        Op opSub = input.getSubOp() ;
View Full Code Here
64
65
66
67
68
69
70
   
    private OpFilter(Op sub)
    {
        super(sub) ;
        expressions = new ExprList() ;
    }
View Full Code Here
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
    }
   
    /** Compress multiple filters:  (filter (filter (filter op)))) into one (filter op) */
    public static OpFilter tidy(OpFilter base)
    {
        ExprList exprs = new ExprList() ;
       
        Op op = base ;
        while ( op instanceof OpFilter )
        {
            OpFilter f = (OpFilter)op ;
            exprs.addAll(f.getExprs()) ;
            op = f.getSubOp() ;
        }
        return new OpFilter(exprs, op) ;
    }
View Full Code Here
71
72
73
74
75
76
77
78
79
80
81
    public TransformFilterPlacementConservative( ) {}

    @Override
    public Op transform(OpFilter opFilter, Op x) {
        // Destructive use of exprs - copy it.
        ExprList exprs = ExprList.copy(opFilter.getExprs());
        Set<Var> varsScope = new HashSet<Var>();

        Op op = transform(exprs, varsScope, x);
        if (op == x)
            // Didn't do anything.
View Full Code Here
300
301
302
303
304
305
306
307
308
309
310
        else
            acc.add(opUnion.getRight()) ;
    }

    protected QueryIterator execute(OpFilter opFilter, QueryIterator input) {
        ExprList exprs = opFilter.getExprs() ;

        Op base = opFilter.getSubOp() ;
        QueryIterator qIter = exec(base, input) ;

        for (Expr expr : exprs)
View Full Code Here
64
65
66
67
68
69
70
71
72
73
74
        return new OpTriple(t2) ;
    }
   
    @Override public Op transform(OpFilter opFilter, Op subOp)
    {
        ExprList exprList = opFilter.getExprs() ;
        ExprList exprList2 = NodeTransformLib.transform(transform, exprList) ;
        if ( exprList2 == exprList )
            return super.transform(opFilter, subOp) ;
        return OpFilter.filter(exprList2, subOp) ;
    }       
View Full Code Here
TOP

Related Classes of com.hp.hpl.jena.sparql.expr.ExprList

  • com.hp.hpl.jena.sdb.layout2.QueryCompiler2$FilterOptimizer
  • com.hp.hpl.jena.sparql.algebra.AlgebraGenerator
  • com.hp.hpl.jena.sparql.algebra.op.OpFilter
  • com.hp.hpl.jena.sparql.algebra.op.OpLeftJoin
  • com.hp.hpl.jena.sparql.algebra.OpAsQuery$Converter
  • com.hp.hpl.jena.sparql.algebra.optimize.TransformApplyInsideExprFunctionOp
  • com.hp.hpl.jena.sparql.algebra.optimize.TransformExpandOneOf
  • com.hp.hpl.jena.sparql.algebra.optimize.TransformFilterConjunction
  • com.hp.hpl.jena.sparql.algebra.optimize.TransformFilterDisjunction
  • com.hp.hpl.jena.sparql.algebra.optimize.TransformFilterEquality
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.