Examples of net.sf.saxon.sxpath.XPathVariable

net.sf.saxon.sxpath.XPathVariable
An object representing an XPath variable for use in the standalone XPath API. The object can only be created by calling the declareVariable method of class {@link IndependentContext}. Note that once declared, this object is thread-safe: it does not hold the actual variable value, which means it can be used with any number of evaluations of a given XPath expression, in series or in parallel.
A variable can be given a value by calling {@link XPathDynamicContext#setVariable(XPathVariable,net.sf.saxon.om.ValueRepresentation)}. Note that the value of the variable is not held in the XPathVariable object, but in the XPathDynamicContext, which means that the XPathVariable itself can be used in multiple threads.

                Map.Entry entry = (Map.Entry) namespaceMap[i];
                sc.declareNamespace((String) entry.getKey(),
                        (String) entry.getValue());
            }
            xpe.setStaticContext(sc);
            XPathVariable thisVar = xpe.declareVariable("", contextVar);
            XPathExpression xpath = xpe.createExpression(path);
            NodeInfo contextItem = 
                //config.buildDocument(new DOMSource(contextNode));
                config.unravel(new DOMSource(contextNode));
            XPathDynamicContext dc = xpath.createDynamicContext(null);

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        if (ic.isAllowUndeclaredVariables()) {
            // self-declaring variables modify the static context. The XPathCompiler must not change state
            // as the result of compiling an expression, so we need to copy the static context.
            ic = env.copy();
            for (Iterator iter = env.iterateExternalVariables(); iter.hasNext();) {
                XPathVariable var = (XPathVariable)iter.next();
                XPathVariable var2 = ic.declareVariable(var.getVariableQName());
                var2.setRequiredType(var.getRequiredType());
            }
        }
        try {
            XPathEvaluator eval = new XPathEvaluator(processor.getUnderlyingConfiguration());
            eval.setStaticContext(ic);

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     * @throws SaxonApiException if the variable has not been declared or if the type of the value
     * supplied does not conform to the required type that was specified when the variable was declared
     */


    public void setVariable(QName name, XdmValue value) throws SaxonApiException {
        XPathVariable var = null;
        StructuredQName qn = name.getStructuredQName();
        for (XPathVariable v : declaredVariables) {
            if (v.getVariableQName().equals(qn)) {
                var = v;
                break;

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     * @throws SaxonApiException if the requiredType is syntactically invalid or if it refers to namespace
     * prefixes or schema components that are not present in the static context
     */


    public void declareVariable(QName qname, ItemType itemType, OccurrenceIndicator occurrences) throws SaxonApiException {
        XPathVariable var = env.declareVariable(qname.getNamespaceURI(), qname.getLocalName());
        var.setRequiredType(
                SequenceType.makeSequenceType(
                        itemType.getUnderlyingItemType(), occurrences.getCardinality()));
        //declaredVariables.add(var);
    }

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     */


    public XPathSelector load() {
        ArrayList<XPathVariable> declaredVariables = new ArrayList<XPathVariable>();
        for (Iterator iter=env.iterateExternalVariables(); iter.hasNext();) {
            XPathVariable var = (XPathVariable)iter.next();
            declaredVariables.add(var);
        }
        return new XPathSelector(exp, declaredVariables);
    }

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     * the method returns null.</p>
     * @since 9.2
     */


    public ItemType getRequiredItemTypeForVariable(QName variableName) {
        XPathVariable var = env.getExternalVariable(variableName.getStructuredQName());
        if (var == null) {
            return null;
        } else {
            return new ConstructedItemType(var.getRequiredType().getPrimaryType(), processor);
        }
    }

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     * the method returns null.</p>
     * @since 9.2
     */


    public OccurrenceIndicator getRequiredCardinalityForVariable(QName variableName) {
        XPathVariable var = env.getExternalVariable(variableName.getStructuredQName());
        if (var == null) {
            return null;
        } else {
            return OccurrenceIndicator.getOccurrenceIndicator(var.getRequiredType().getCardinality());
        }
    }

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     *
     * @param qname The name of the variable, expressions as a QName
     */


    public void declareVariable(QName qname) {
        XPathVariable var = env.declareVariable(qname.getNamespaceURI(), qname.getLocalName());
        declaredVariables.add(var);
    }

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//        try {
//            type = parser.parseSequenceType(requiredType, env);
//        } catch (XPathException e) {
//            throw new SaxonApiException(e);
//        }
        XPathVariable var = env.declareVariable(qname.getNamespaceURI(), qname.getLocalName());
        var.setRequiredType(
                SequenceType.makeSequenceType(
                        itemType.getUnderlyingItemType(), occurrences.getCardinality()));
        declaredVariables.add(var);
    }

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     * @throws SaxonApiException if the variable has not been declared or if the type of the value
     * supplied does not conform to the required type that was specified when the variable was declared
     */


    public void setVariable(QName name, XdmValue value) throws SaxonApiException {
        XPathVariable var = null;
        for (XPathVariable v : declaredVariables) {
            if (v.getVariableQName().equals(name.getStructuredQName())) {
                var = v;
                break;
            }

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Related Classes of net.sf.saxon.sxpath.XPathVariable

net.sf.saxon.s9api.XPathCompiler

net.sf.saxon.s9api.XPathExecutable

net.sf.saxon.s9api.XPathSelector

org.apache.xmlbeans.impl.xpath.saxon.XBeansXPath

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