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

Examples of com.hp.hpl.jena.sparql.algebra.table.TableEmpty

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        {
            if ( evaluator.getExecContext().getDataset().containsGraph(graphNode) )
            { return new TableUnit() ; }
            else
                // WRONG
            { return new TableEmpty() ; }
        }

        if ( ! Var.isVar(graphNode) )
            throw new ARQInternalErrorException("OpDatasetNames: Not a URI or variable: "+graphNode) ;
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        if ( ! Var.isVar(opGraph.getNode()) )
        {
            Graph graph = execCxt.getDataset().getGraph(opGraph.getNode()) ;
            if ( graph == null )
                // No such name in the dataset
                return new TableEmpty() ;
            ExecutionContext execCxt2 = new ExecutionContext(execCxt, graph) ;
            Evaluator e2 = EvaluatorFactory.create(execCxt2) ;
            return eval(e2, opGraph.getSubOp()) ;
        }
       
        // Graph node is a variable.
        Var gVar = Var.alloc(opGraph.getNode()) ;
        Table current = null ;
        for ( Iterator<Node> iter = execCxt.getDataset().listGraphNodes() ; iter.hasNext() ; )
        {
            Node gn = iter.next();
            Graph graph = execCxt.getDataset().getGraph(gn) ;
            ExecutionContext execCxt2 = new ExecutionContext(execCxt, graph) ;
            Evaluator e2 = EvaluatorFactory.create(execCxt2) ;
           
            Table tableVarURI = TableFactory.create(gVar, gn) ;
            // Evaluate the pattern, join with this graph node possibility.
            // XXX If Var.ANON then no-opt.
            Table patternTable = eval(e2, opGraph.getSubOp()) ;
            Table stepResult = evaluator.join(patternTable, tableVarURI) ;
           
            if ( current == null )
                current = stepResult ;
            else
                current = evaluator.union(current, stepResult) ;
        }
       
        if ( current == null )
            // Nothing to loop over
            return new TableEmpty() ;
        return current ;
    }
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            if ( opQuad.isDefaultGraph() )
                g = ds.getDefaultGraph() ;
            else
                g = ds.getGraph(opQuad.getGraphNode()) ;
            if ( g == null )
                return new TableEmpty() ;
            ExecutionContext cxt2 = new ExecutionContext(cxt, g) ;
            QueryIterator qIter = executeBGP(pattern, QueryIterRoot.create(cxt2), cxt2) ;
            return TableFactory.create(qIter) ;
        }
        else
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{
    public static Table createUnit()
    { return new TableUnit() ; }
   
    public static Table createEmpty()
    { return new TableEmpty() ; }
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        {
            if ( evaluator.getExecContext().getDataset().containsGraph(graphNode) )
            { return new TableUnit() ; }
            else
                // WRONG
            { return new TableEmpty() ; }
        }

        if ( ! Var.isVar(graphNode) )
            throw new ARQInternalErrorException("OpDatasetNames: Not a URI or variable: "+graphNode) ;
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        if ( ! Var.isVar(opGraph.getNode()) )
        {
            Graph graph = execCxt.getDataset().getGraph(opGraph.getNode()) ;
            if ( graph == null )
                // No such name in the dataset
                return new TableEmpty() ;
            ExecutionContext execCxt2 = new ExecutionContext(execCxt, graph) ;
            Evaluator e2 = EvaluatorFactory.create(execCxt2) ;
            return eval(e2, opGraph.getSubOp()) ;
        }
       
        // Graph node is a variable.
        Var gVar = Var.alloc(opGraph.getNode()) ;
        Table current = null ;
        for ( Iterator<Node> iter = execCxt.getDataset().listGraphNodes() ; iter.hasNext() ; )
        {
            Node gn = iter.next();
            Graph graph = execCxt.getDataset().getGraph(gn) ;
            ExecutionContext execCxt2 = new ExecutionContext(execCxt, graph) ;
            Evaluator e2 = EvaluatorFactory.create(execCxt2) ;
           
            Table tableVarURI = TableFactory.create(gVar, gn) ;
            // Evaluate the pattern, join with this graph node possibility.
            // XXX If Var.ANON then no-opt.
            Table patternTable = eval(e2, opGraph.getSubOp()) ;
            Table stepResult = evaluator.join(patternTable, tableVarURI) ;
           
            if ( current == null )
                current = stepResult ;
            else
                current = evaluator.union(current, stepResult) ;
        }
       
        if ( current == null )
            // Nothing to loop over
            return new TableEmpty() ;
        return current ;
    }
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            if ( opQuad.isDefaultGraph() )
                g = ds.getDefaultGraph() ;
            else
                g = ds.getGraph(opQuad.getGraphNode()) ;
            if ( g == null )
                return new TableEmpty() ;
            ExecutionContext cxt2 = new ExecutionContext(cxt, g) ;
            QueryIterator qIter = executeBGP(pattern, QueryIterRoot.create(cxt2), cxt2) ;
            return TableFactory.create(qIter) ;
        }
        else
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{
    public static Table createUnit()
    { return new TableUnit() ; }
   
    public static Table createEmpty()
    { return new TableEmpty() ; }
View Full Code Here
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        {
            if ( evaluator.getExecContext().getDataset().containsGraph(graphNode) )
            { return new TableUnit() ; }
            else
                // WRONG
            { return new TableEmpty() ; }
        }

        if ( ! Var.isVar(graphNode) )
            throw new ARQInternalErrorException("OpDatasetNames: Not a URI or variable: "+graphNode) ;
View Full Code Here
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        if ( ! Var.isVar(opGraph.getNode()) )
        {
            Graph graph = execCxt.getDataset().getGraph(opGraph.getNode()) ;
            if ( graph == null )
                // No such name in the dataset
                return new TableEmpty() ;
            ExecutionContext execCxt2 = new ExecutionContext(execCxt, graph) ;
            Evaluator e2 = EvaluatorFactory.create(execCxt2) ;
            return eval(e2, opGraph.getSubOp()) ;
        }
       
        // Graph node is a variable.
        Var gVar = Var.alloc(opGraph.getNode()) ;
        Table current = null ;
        for ( Iterator<Node> iter = execCxt.getDataset().listGraphNodes() ; iter.hasNext() ; )
        {
            Node gn = iter.next();
            Graph graph = execCxt.getDataset().getGraph(gn) ;
            ExecutionContext execCxt2 = new ExecutionContext(execCxt, graph) ;
            Evaluator e2 = EvaluatorFactory.create(execCxt2) ;
           
            Table tableVarURI = TableFactory.create(gVar, gn) ;
            // Evaluate the pattern, join with this graph node possibility.
            // XXX If Var.ANON then no-opt.
            Table patternTable = eval(e2, opGraph.getSubOp()) ;
            Table stepResult = evaluator.join(patternTable, tableVarURI) ;
           
            if ( current == null )
                current = stepResult ;
            else
                current = evaluator.union(current, stepResult) ;
        }
       
        if ( current == null )
            // Nothing to loop over
            return new TableEmpty() ;
        return current ;
    }
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Related Classes of com.hp.hpl.jena.sparql.algebra.table.TableEmpty

  • com.hp.hpl.jena.sparql.algebra.TableFactory
  • com.hp.hpl.jena.sparql.engine.iterator.QueryIterNullIterator
  • com.hp.hpl.jena.sparql.engine.ref.Eval
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