Examples of javax.xml.xpath.XPath.evaluate()

javax.xml.xpath.XPath.evaluate()

Evaluate an XPath expression in the specified context and return the result as the specified type.

See Evaluation of XPath Expressions for context item evaluation, variable, function and QName resolution and return type conversion.

If returnType is not one of the types defined in {@link XPathConstants} ({@link XPathConstants#NUMBER NUMBER}, {@link XPathConstants#STRING STRING}, {@link XPathConstants#BOOLEAN BOOLEAN}, {@link XPathConstants#NODE NODE} or{@link XPathConstants#NODESET NODESET}) then an IllegalArgumentException is thrown.

If a null value is provided for item, an empty document will be used for the context. If expression or returnType is null, then a NullPointerException is thrown.
@param expression The XPath expression. @param item The starting context (node or node list, for example). @param returnType The desired return type. @return Result of evaluating an XPath expression as an Object of returnType. @throws XPathExpressionException If expression cannot be evaluated. @throws IllegalArgumentException If returnType is not one of the types defined in {@link XPathConstants}. @throws NullPointerException If expression or returnType is null.

                }
                else
                {
                    try
                    {
                        el = (Element) xpath.evaluate(expression, doc, XPathConstants.NODE);
                    }
                    catch (XPathExpressionException e)
                    {
                        e.printStackTrace();
                    }

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        xpath.setNamespaceContext(new DSNamespaceContext());


        for (String localName : localNames) {
            String expression = "//*[local-name()='" + localName + "']";
            NodeList elementsToSign =
                    (NodeList) xpath.evaluate(expression, document, XPathConstants.NODESET);
            for (int i = 0; i < elementsToSign.getLength(); i++) {
                Element elementToSign = (Element)elementsToSign.item(i);
                Assert.assertNotNull(elementToSign);
                String id = UUID.randomUUID().toString();
                elementToSign.setAttributeNS(null, "Id", id);

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        sig.sign(signingKey);


        String expression = "//ds:Signature[1]";
        Element sigElement =
                (Element) xpath.evaluate(expression, document, XPathConstants.NODE);
        Assert.assertNotNull(sigElement);


        return sig;
    }

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        xpath.setNamespaceContext(new DSNamespaceContext());


        for (String localName : localNames) {
            String expression = "//*[local-name()='" + localName + "']";
            Element elementToEncrypt =
                    (Element) xpath.evaluate(expression, document, XPathConstants.NODE);
            Assert.assertNotNull(elementToEncrypt);


            document = cipher.doFinal(document, elementToEncrypt, content);
        }

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                    return null;
                }
            });
        }
        try {
            return (NodeList) xPath.evaluate(xpointer.substring(xPointerSchemeIndex, xPointerSchemeEndIndex), node, XPathConstants.NODESET);
        } catch (XPathExpressionException e) {
            throw new SAXException(e);
        }
    }

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        XPath xpath = xpf.newXPath();
        xpath.setNamespaceContext(new DSNamespaceContext());


        String expression = "//ds:Transform[1]";
        Element transformEl = 
            (Element) xpath.evaluate(expression, doc1, XPathConstants.NODE);


        Transform transform = 
            new Transform(doc1, Transforms.TRANSFORM_XSLT, transformEl.getChildNodes());


        transform.performTransform(new XMLSignatureInput(doc2));

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        XPath xpath = xpf.newXPath();
        xpath.setNamespaceContext(new DSNamespaceContext());


        String expression = "//ds:Base64";
        Node base64Node = 
            (Node) xpath.evaluate(expression, doc, XPathConstants.NODE);


        XMLSignatureInput xmlinput = new XMLSignatureInput(base64Node);


        Document doc2 = TransformBase64DecodeTest.createDocument();
        Transforms t = new Transforms(doc2);

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        DSNamespaceContext context = new DSNamespaceContext(namespace);
        xpath.setNamespaceContext(context);


        String expression =  "//*[local-name()='Number']";
        Node ccnumElt = 
            (Node) xpath.evaluate(expression, doc, XPathConstants.NODE);


        if (ccnumElt != null) {
            return ccnumElt.getTextContent();
        }

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                XPath xpath = factory.newXPath();
                if (namespaces != null) {
                    xpath.setNamespaceContext(new MapNamespaceContext(namespaces));
                }
               
                NodeList list = (NodeList)xpath.evaluate(expression, saaj.getSOAPPart().getEnvelope(),
                                               XPathConstants.NODESET);
                for (int x = 0; x < list.getLength(); x++) {
                    Element el = (Element)list.item(x);
                    
                    if (!found.contains(el)) {

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                XPath xpath = factory.newXPath();
                if (namespaces != null) {
                    xpath.setNamespaceContext(new MapNamespaceContext(namespaces));
                }
               
                NodeList list = (NodeList)xpath.evaluate(expression, saaj.getSOAPPart().getEnvelope(),
                                               XPathConstants.NODESET);
                for (int x = 0; x < list.getLength(); x++) {
                    Element el = (Element)list.item(x);
                    
                    if (!found.contains(el)) {

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