Examples of net.sf.saxon.om.ValueRepresentation

net.sf.saxon.om.ValueRepresentation
A ValueRepresentation is a representation of a Value. This is a marker interface used to represent the union of two classes: Value, and NodeInfo. Either of these two classes can be used to represent a value. The class is used primarily to represent the value of a variable.
This class is intended primarily for internal use, and should not be considered part of the Saxon public API.


    public SequenceIterator iterate(XPathContext context) throws XPathException {
        final XPathContextMajor cm = (XPathContextMajor)context;
        while (true) {
            SequenceIterator iter = operand.iterate(cm);
            ValueRepresentation extent = SequenceExtent.makeSequenceExtent(iter);
            UserFunction fn = cm.getTailCallFunction();
            if (fn == null) {
               return Value.asIterator(extent);
            }
            if (fn != containingFunction) {

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    public ValueRepresentation evaluateVariable(XPathContext context) throws XPathException {
        final Controller controller = context.getController();
        final Bindery b = controller.getBindery();


        final ValueRepresentation v = b.getGlobalVariable(getSlotNumber());


        if (v != null) {
            return v;
        } else {


            // This is the first reference to a global variable; try to evaluate it now.
            // But first set a flag to stop looping. This flag is set in the Bindery because
            // the VariableReference itself can be used by multiple threads simultaneously


            try {
                b.setExecuting(this, true);
                ValueRepresentation value = getSelectValue(context);
                b.defineGlobalVariable(this, value);
                b.setExecuting(this, false);
                return value;


            } catch (XPathException err) {

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     * @throws XPathException if the variable is undefined
     */


    public SequenceIterator iterate(XPathContext c) throws XPathException {
        try {
            ValueRepresentation actual = evaluateVariable(c);
            return Value.getIterator(actual);
        } catch (XPathException err) {
            err.maybeSetLocation(this);
            throw err;
        } catch (AssertionError err) {

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        }
    }


    public Item evaluateItem(XPathContext c) throws XPathException {
        try {
            ValueRepresentation actual = evaluateVariable(c);
            if (actual instanceof Item) {
                return (Item) actual;
            }
            return Value.asItem(actual);
        } catch (XPathException err) {

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        }
    }


    public void process(XPathContext c) throws XPathException {
        try {
            ValueRepresentation actual = evaluateVariable(c);
            if (actual instanceof NodeInfo) {
                actual = new SingletonNode((NodeInfo) actual);
            }
            ((Value) actual).process(c);
        } catch (XPathException err) {

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Related Classes of net.sf.saxon.om.ValueRepresentation

net.sf.saxon.expr.Assignation

net.sf.saxon.expr.AtomicSequenceConverter

net.sf.saxon.expr.LetExpression

net.sf.saxon.expr.SuppliedParameterReference

net.sf.saxon.expr.TailCallLoop

net.sf.saxon.expr.TailExpression

net.sf.saxon.expr.UserFunctionCall

net.sf.saxon.expr.VariableReference

net.sf.saxon.functions.PartialApply

net.sf.saxon.instruct.Assign

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