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

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

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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, NodeFactoryExtra.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, NodeFactoryExtra.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, NodeFactoryExtra.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, NodeFactoryExtra.nodeToInt(result.asNode()));
    }
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        ExprFunction2 eq = (ExprFunction2)e ;
        Expr left = eq.getArg1() ;
        Expr right = eq.getArg2() ;

        Var var = null ;
        NodeValue constant = null ;

        if ( left.isVariable() && right.isConstant() )
        {
            var = left.asVar() ;
            constant = right.getConstant() ;
        }
        else if ( right.isVariable() && left.isConstant() )
        {
            var = right.asVar() ;
            constant = left.getConstant() ;
        }

        if ( var == null || constant == null )
            return null ;

        if ( !patternVars.contains(var) )
            return null ;
       
        // Corner case: sameTerm is false for string/plain literal,
        // but true in the graph for graph matching.
        if (e instanceof E_SameTerm)
        {
            if ( ! ARQ.isStrictMode() && constant.isString() )
                return null ;
        }
       
        // Final check for "=" where a FILTER = can do value matching when the graph does not.
        if ( e instanceof E_Equals )
        {
            // Value based?
            // XXX Optimize here.
            if ( ! ARQ.isStrictMode() && constant.isLiteral() )
                return null ;
        }

        return subst(subOp, var, constant) ;
    }
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            //        {
            //            if ( s.equals("0") ) s = "false" ;
            //            if ( s.equals("1") ) s = "true" ;
            //        }

            NodeValue r = cast(s, v, castType) ;
            return r ;
        }
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                    BindingMap b = BindingFactory.create(k) ;
                   
                    for ( Pair<Var, Accumulator> pair : accs )
                    {
                        Var v = pair.getLeft() ;
                        NodeValue value = pair.getRight().getValue() ;
                        Node n = (value==null) ? null : value.asNode() ;
                        if ( v == null || n == null )
                        {}
                        else
                            b.add(v, n) ;
                    }
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        {
            if ( count == 0 ) return noValuesToAvg ;
            if ( super.errorCount != 0 )
                //throw new ExprEvalException("avg: error in group") ;
                return null ;
            NodeValue nvCount = NodeValue.makeInteger(count) ;
            return XSDFuncOp.divide(total, nvCount) ;
        }
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        @Override
        public NodeValue getAccValue()
        {
            if ( count == 0 ) return noValuesToAvg ;
            NodeValue nvCount = NodeValue.makeInteger(count) ;
            return XSDFuncOp.divide(total, nvCount) ;
        }
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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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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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