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

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

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    @Override
    public NodeValue exec(List<NodeValue> args) {
        if ( args.size() > 1 )
            throw new ExprEvalException("replace: Wrong number of arguments: "+args.size()+" : [wanted 1]") ;
       
        NodeValue v1 = args.get(0) ;
       
        return convert(v1) ;
    }
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    }

    static private float asFloat(Node n)
    {
        if ( n == null ) return Float.MIN_VALUE ;
        NodeValue nv = NodeValue.makeNode(n) ;
        if ( nv.isFloat() )
            return nv.getFloat() ;
        return Float.MIN_VALUE ;
    }
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        UserDefinedFunction f = (UserDefinedFunction) UserDefinedFunctionFactory.getFactory().create("http://example/cube");
        f.build("http://example/cube", new ExprList(new NodeValueInteger(2)));
       
        Expr actual = f.getActualExpr();
        NodeValue result = actual.eval(BindingFactory.create(), FunctionEnvBase.createTest());
        Assert.assertEquals(8, NodeFactory.nodeToInt(result.asNode()));
       
        //Change the definition of the function we depend on
        square = new ExprVar("x");
        UserDefinedFunctionFactory.getFactory().add("http://example/square", square, new ArrayList<Var>(square.getVarsMentioned()));
        f.build("http://example/cube", new ExprList(new NodeValueInteger(2)));
       
        actual = f.getActualExpr();
        result = actual.eval(BindingFactory.create(), FunctionEnvBase.createTest());
        Assert.assertEquals(4, NodeFactory.nodeToInt(result.asNode()));
    }
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        UserDefinedFunction f = (UserDefinedFunction) UserDefinedFunctionFactory.getFactory().create("http://example/cube");
        f.build("http://example/cube", new ExprList(new NodeValueInteger(2)));
       
        Expr actual = f.getActualExpr();
        NodeValue result = actual.eval(BindingFactory.create(), FunctionEnvBase.createTest());
        Assert.assertEquals(8, NodeFactory.nodeToInt(result.asNode()));
       
        //Change the definition of the function we depend on
        //This has no effect with preserveDependencies set to false (the default) since we fully expanded the call to the dependent
        //function when our outer function was defined
        square = new ExprVar("x");
        UserDefinedFunctionFactory.getFactory().add("http://example/square", square, new ArrayList<Var>(square.getVarsMentioned()));
        f.build("http://example/cube", new ExprList(new NodeValueInteger(2)));
       
        actual = f.getActualExpr();
        result = actual.eval(BindingFactory.create(), FunctionEnvBase.createTest());
        Assert.assertEquals(8, NodeFactory.nodeToInt(result.asNode()));
    }
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    private static PrefixMapping pmap = ARQConstants.getGlobalPrefixMap() ;
   
    private static void test(String string, String result)
    {
        Expr expr = ExprUtils.parse(string, pmap) ;
        NodeValue nv = expr.eval(null, new FunctionEnvBase()) ;
        Node r = NodeFactory.parseNode(result) ;
        NodeValue nvr = NodeValue.makeNode(r) ;
       
        assertTrue("Not same value: Expected: "+nvr+" : Actual = "+nv, NodeValue.sameAs(nvr, nv)) ; 
        // test result must be lexical form exact.
        assertEquals(r, nv.asNode()) ;
    }
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        DatasetGraph dsg = TDBFactory.createDatasetGraph(loc) ;
       
        if ( root.hasProperty(pUnionDefaultGraph) )
        {
            Node b = root.getProperty(pUnionDefaultGraph).getObject().asNode() ;
            NodeValue nv = NodeValue.makeNode(b) ;
            if ( nv.isBoolean() )
                dsg.getContext().set(TDB.symUnionDefaultGraph, nv.getBoolean()) ;
            else
                Log.warn(DatasetAssemblerTDB.class,
                         "Failed to recognize value for union graph setting (ignored): "+b) ;
        }
       
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            if ( ! first )
                s.append(sep) ;
            // Values are printed withquoting.
            if ( ex instanceof NodeValue )
            {
                NodeValue nv =(NodeValue)ex ;
                s.append(nv.asQuotedString()) ;
            }
            else
                s.append(ex.toString()) ;
            first = false ;
        }
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    }

    public static NodeValue parseNodeValue(String s)
    {
        Node n = NodeFactory.parseNode(s) ;
        NodeValue nv = NodeValue.makeNode(n) ;
        return nv ;
    }
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    }

    public static void evalPrint(Expr expr, Binding binding)
    {
        try {
            NodeValue r = eval(expr, binding) ;
            //System.out.println(r.asQuotedString()) ;
            Node n = r.asNode() ;
            String s = FmtUtils.stringForNode(n) ;
            System.out.println(s) ;
        } catch (ExprEvalException ex)
        {
            System.out.println("Exception: "+ex.getMessage()) ;
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    public static NodeValue eval(Expr expr, Binding binding)
    {
        Context context = ARQ.getContext().copy() ;
        context.set(ARQConstants.sysCurrentTime, NodeFactory.nowAsDateTime()) ;
        FunctionEnv env = new ExecutionContext(context, null, null, null) ;
        NodeValue r = expr.eval(binding, env) ;
        return r ;
    }
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Related Classes of com.hp.hpl.jena.sparql.expr.NodeValue

  • arq.qexpr
  • com.hp.hpl.jena.datatypes.RDFDatatype
  • com.hp.hpl.jena.datatypes.xsd.XSDDateTime
  • com.hp.hpl.jena.datatypes.xsd.XSDDuration
  • com.hp.hpl.jena.graph.impl.LiteralLabel
  • com.hp.hpl.jena.graph.Node
  • com.hp.hpl.jena.sparql.algebra.optimize.TransformFilterEquality
  • com.hp.hpl.jena.sparql.core.assembler.DatasetNullAssembler
  • com.hp.hpl.jena.sparql.core.VarExprList
  • com.hp.hpl.jena.sparql.engine.binding.BindingComparator
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