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

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

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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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        Expr expr = exprs.get(var) ;
        if ( expr == null )
            return binding.get(var) ;
       
        try {
            NodeValue nv = expr.eval(binding, funcEnv) ;
            if ( nv == null )
                return null ;
            return nv.asNode() ;
        } catch (ExprEvalException ex)
        //{ Log.warn(this, "Eval failure "+expr+": "+ex.getMessage()) ; }
        { }
        return null ;
    }
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            throw new ARQInternalErrorException(Utils.className(this)+": Null args list") ;
       
        if ( args.size() != 2 )
            throw new ExprEvalException(Utils.className(this)+": Wrong number of arguments: Wanted 2, got "+args.size()) ;
       
        NodeValue v1 = args.get(0) ;
        NodeValue v2 = args.get(1) ;
       
        return exec(v1, v2) ;
    }
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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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        // Loose style. Add any duration to any date or time value.
        if ( vs1.equals(VSPACE_DATETIME) && vs2.equals(VSPACE_DURATION) )
        {
            XMLGregorianCalendar cal = nv1.getDateTime() ;
            XMLGregorianCalendar result = xsd_add(cal, nv2.getDuration()) ;
            NodeValue r = NodeValue.makeDateTime(result) ;
            return r ;
        }
        // Loose style. Add any duration to any date or time value.
        if ( vs1.equals(VSPACE_DATE) && vs2.equals(VSPACE_DURATION) )
        {
            XMLGregorianCalendar cal = nv1.getDateTime() ;
            XMLGregorianCalendar result = xsd_add(cal, nv2.getDuration()) ;
            NodeValue r = NodeValue.makeDate(result) ;
            return r ;
        }
        // Loose style. Add any duration to any date or time value.
        if ( vs1.equals(VSPACE_TIME) && vs2.equals(VSPACE_DURATION) )
        {
            // ONLY dayTime.
            XMLGregorianCalendar cal = nv1.getDateTime() ;
            XMLGregorianCalendar result = xsd_add(cal, nv2.getDuration()) ;
            NodeValue r = NodeValue.makeNode(result.toXMLFormat(), XSDDatatype.XSDtime) ;
            return r ;
        }
       
        if ( isDT(vs2) && vs1.equals(VSPACE_DURATION) )
            // Carefully ...
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        if ( vs1.equals(VSPACE_DATETIME) && vs2.equals(VSPACE_DURATION) )
        {
            XMLGregorianCalendar cal = nv1.getDateTime() ;
            // add-negation
            XMLGregorianCalendar result = xsd_subtract(cal, nv2.getDuration()) ;
            NodeValue r = NodeValue.makeDateTime(result) ;
            return r ;
        }
        if ( vs1.equals(VSPACE_DATE) && vs2.equals(VSPACE_DURATION) )
        {
            XMLGregorianCalendar cal = nv1.getDateTime() ;
            // add-negation
            XMLGregorianCalendar result = xsd_subtract(cal, nv2.getDuration()) ;
            NodeValue r = NodeValue.makeDate(result) ;
            return r ;
        }
        if ( vs1.equals(VSPACE_TIME) && vs2.equals(VSPACE_DURATION) )
        {
            XMLGregorianCalendar cal = nv1.getDateTime() ;
            // add-negation
            XMLGregorianCalendar result = xsd_subtract(cal, nv2.getDuration()) ;
            NodeValue r = NodeValue.makeNode(result.toXMLFormat(), XSDDatatype.XSDtime) ;
            return r ;
        }
       
        throw new ExprEvalTypeException("Operator '-' : Undefined subtraction: "+nv1+" and "+nv2) ;
    }
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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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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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