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.

      xPath.setNamespaceContext(XmlService.get().getNamespaceContext());
      XmlSection linkSection = null;
      String linkText = "?";
      try {
        String path = String.format("//dtb:noteref[@idref='#%s']", idref);
        NodeList nl = (NodeList) xPath.evaluate(path, sec.getXmlDocument().getDocument().getDocumentElement(), XPathConstants.NODESET);
        if (nl.getLength() > 0) {
          Element node = null;
          node = (Element) nl.item(0);
          linkText = node.getTextContent();
          // Scan parents until you find the smallest enclosing XML Section.

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        XPathFactory factory = XPathFactory.newInstance();
        Assert.assertNotNull("XPathFactory not null", factory);
        XPath xpath = factory.newXPath();
        URL resurl = getClass().getClassLoader().getResource("simple.xml");
        InputSource inputSource = new InputSource(resurl.openStream());
        String content = xpath.evaluate("/root/child", inputSource);
        Assert.assertEquals("content", content);
    }
}

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            DocumentBuilder builder = domFactory.newDocumentBuilder();
            Document doc = builder.parse(procDefIS);


            XPath xpath = XPathFactory.newInstance().newXPath();


            NodeList nodeList = (NodeList) xpath.evaluate("//userTask | //serviceTask | //scriptTask", doc,
                    XPathConstants.NODESET);
            for (int i = 0; i < nodeList.getLength(); i++) {
                result.add(nodeList.item(i).getAttributes().getNamedItem("id").getNodeValue());
            }
        } catch (Exception e) {

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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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                    if (namespaces != null) {
                        xpath.setNamespaceContext(new MapNamespaceContext(namespaces));
                    }
                    NodeList list;
                    try {
                        list = (NodeList)xpath.evaluate(expression, 
                                                                 header,
                                                                 XPathConstants.NODESET);
                        if (list.getLength() == 0) {
                            ai.setNotAsserted("No header element matching XPath " + expression + " found.");
                        }

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    private static XPathFactory xpf = XPathFactory.newInstance();


    static String xpath(final String expr, final Node node) {
        final XPath xp = xpf.newXPath();
        try {
            return (String)xp.evaluate(expr, node, XPathConstants.STRING);
        } catch(XPathExpressionException e) {
            throw new RuntimeException(e);
        }
    }

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        builderKeyInfo.add(encryptedKey);


        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, false);
        }

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

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                    if (namespaces != null) {
                        xpath.setNamespaceContext(new MapNamespaceContext(namespaces));
                    }
                    NodeList list;
                    try {
                        list = (NodeList)xpath.evaluate(expression, 
                                                                 header,
                                                                 XPathConstants.NODESET);
                        if (list.getLength() == 0) {
                            ai.setNotAsserted("No header element matching XPath " + expression + " found.");
                        }

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        try {
            TidyMarkupDataFormat dataFormat = new TidyMarkupDataFormat();
            dataFormat.setMethod("html");
            Node doc = dataFormat.asNodeTidyMarkup(new BufferedInputStream(url.openStream()));
            XPath xpath = XPathFactory.newInstance().newXPath();
            Node nd = (Node)xpath.evaluate("//div[@class='" + contentDivClass + "']", doc, XPathConstants.NODE);
            if (nd != null) {
                return  new XmlConverter().toString(nd, null);
            }
        } catch (Throwable e) {
            if (errorOnDownloadFailure) {

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