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

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

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//        }
        if ( graphs.size() == 1 )
        {
            // Simple rewrite.
            Node n = graphs.iterator().next() ;
            return new OpQuadPattern(n, basicPattern) ;
        }
           
        OpSequence opSeq = OpSequence.create() ;
       
        for ( Triple t : basicPattern )
        {
            // One expansion for each triple pattern.
            Op union = null ;
            for ( Node n : graphs )
            {
                BasicPattern bp = new BasicPattern() ;
                bp.add(t) ;
                Op pattern = new OpQuadPattern(n, bp) ;
                union = OpUnion.create(union, pattern) ;
            }
            opSeq.add(union) ;
        }
       
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    @Override
    public Op transform(OpQuadPattern opQuadPattern)
    {
        if ( opQuadPattern.getGraphNode().equals(oldGraphName) )
            opQuadPattern = new OpQuadPattern(newGraphName, opQuadPattern.getBasicPattern()) ;
        return super.transform(opQuadPattern) ;
    }
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    }
   
    public static Op transform(ExprList exprs, Node graphNode, BasicPattern bgp)
    {
        if ( ! doFilterPlacement )
            return OpFilter.filter(exprs, new OpQuadPattern(graphNode, bgp)) ;
        Op op =  transformFilterQuadPattern(exprs, new HashSet<Var>(), graphNode, bgp);
        op = buildFilter(exprs, op) ;
        return op ;
    }
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            VarUtils.addVar(patternVarsScope, Var.alloc(graphNode)) ;
        }
       
        for ( Triple triple : pattern )
        {
            OpQuadPattern opQuad = getQuads(op) ;
            if ( opQuad == null )
            {
                opQuad = new OpQuadPattern(graphNode, new BasicPattern()) ;   
                op = OpSequence.create(op, opQuad) ;
            }
           
            opQuad.getBasicPattern().add(triple) ;
            // Update variables in scope.
            VarUtils.addVarsFromTriple(patternVarsScope, triple) ;

            // Attempt to place any filters
            op = insertAnyFilter(exprs, patternVarsScope, op) ;
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        Node g2 = opQuadPattern.getGraphNode() ;
        g2 = transform.convert(g2) ;
       
        if ( g2 == opQuadPattern.getGraphNode() && bgp2 == opQuadPattern.getBasicPattern() )
            return super.transform(opQuadPattern) ;
        return new OpQuadPattern(g2, bgp2) ;
    }
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        }
       
        // (filter (quadpattern ...))
        if ( opFilter.getSubOp() instanceof OpQuadPattern )
        {
            OpQuadPattern quadPattern = (OpQuadPattern)opFilter.getSubOp() ;
            DatasetGraphTDB ds = (DatasetGraphTDB)execCxt.getDataset() ;
            return optimizeExecuteQuads(ds, input,
                                        quadPattern.getGraphNode(), quadPattern.getBasicPattern(),
                                        opFilter.getExprs(), execCxt) ;
        }
   
        // (filter (anything else))
        return super.execute(opFilter, input) ;
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        // -- Filter placement
        Op op = null ;
        if ( exprs != null )
            op = TransformFilterPlacement.transform(exprs, gn, bgp) ;
        else
            op = new OpQuadPattern(gn, bgp) ;

        return plainExecute(op, input, execCxt) ;
    }
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        Triple triple = new Triple(s, p ,o) ;
       
        // Evaluate as an algebra expression
        BasicPattern pattern = new BasicPattern() ;
        pattern.add(triple) ;
        Op op = new OpQuadPattern(graphNode, pattern) ;
        Plan plan = QueryEngineSDB.getFactory().create(op, datasetStore, BindingRoot.create(), null) ;
       
        QueryIterator qIter = plan.iterator() ;
       
        if ( SDB.getContext().isTrue(SDB.streamGraphAPI) )
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    }
   
    public static Op transform(ExprList exprs, Node graphNode, BasicPattern bgp)
    {
        if ( ! doFilterPlacement )
            return OpFilter.filter(exprs, new OpQuadPattern(graphNode, bgp)) ;
        // Mutated
        ExprList exprs2 = new ExprList(exprs) ;
        Op op =  transformFilterQuadPattern(exprs2, new HashSet<Var>(), graphNode, bgp);
        op = buildFilter(exprs2, op) ;
        return op ;
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            VarUtils.addVar(patternVarsScope, Var.alloc(graphNode)) ;
        }
       
        for ( Triple triple : pattern )
        {
            OpQuadPattern opQuad = getQuads(op) ;
            if ( opQuad == null )
            {
                opQuad = new OpQuadPattern(graphNode, new BasicPattern()) ;   
                op = OpSequence.create(op, opQuad) ;
            }
           
            opQuad.getBasicPattern().add(triple) ;
            // Update variables in scope.
            VarUtils.addVarsFromTriple(patternVarsScope, triple) ;

            // Attempt to place any filters
            op = insertAnyFilter(exprs, patternVarsScope, op) ;
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Related Classes of com.hp.hpl.jena.sparql.algebra.op.OpQuadPattern

  • com.hp.hpl.jena.sdb.graph.GraphQueryHandlerSDB
  • com.hp.hpl.jena.sdb.graph.GraphSDB
  • 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.TransformReorder
  • com.hp.hpl.jena.sparql.core.Quad
  • com.hp.hpl.jena.sparql.core.QuadPattern
  • com.hp.hpl.jena.sparql.graph.NodeTransformOp
  • com.hp.hpl.jena.tdb.migrate.TransformDynamicDataset_Imperfect
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