Example usage for javax.xml.xpath XPathFactory newInstance

Introduction

In this page you can find the example usage for javax.xml.xpath XPathFactory newInstance.

Prototype

public static XPathFactory newInstance() 

Source Link

Document

Get a new XPathFactory instance using the default object model, #DEFAULT_OBJECT_MODEL_URI , the W3C DOM.

This method is functionally equivalent to:

 newInstance(DEFAULT_OBJECT_MODEL_URI) 

Since the implementation for the W3C DOM is always available, this method will never fail.

Usage

From source file:com.github.robozonky.app.version.UpdateMonitor.java

/**
 * Parse XML using XPath and retrieve the version string.
 * @param xml XML in question.//  w w  w.  ja  v  a  2 s. c o  m
 * @return The version string.
 * @throws ParserConfigurationException Failed parsing XML.
 * @throws IOException Failed I/O.
 * @throws SAXException Failed reading XML.
 * @throws XPathExpressionException XPath parsing problem.
 */
private static VersionIdentifier parseVersionString(final InputStream xml)
        throws ParserConfigurationException, IOException, SAXException, XPathExpressionException {
    final DocumentBuilderFactory factory = XmlUtil.getDocumentBuilderFactory();
    final DocumentBuilder builder = factory.newDocumentBuilder();
    final Document doc = builder.parse(xml);
    final XPathFactory xPathfactory = XPathFactory.newInstance();
    final XPath xpath = xPathfactory.newXPath();
    final XPathExpression expr = xpath.compile("/metadata/versioning/versions/version");
    return UpdateMonitor.parseNodeList((NodeList) expr.evaluate(doc, XPathConstants.NODESET));
}

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From source file:com.gisgraphy.domain.geoloc.service.fulltextsearch.SolrClient.java

public boolean isServerAlive() {
    try {//  w  ww. jav a2  s.  c o m
        DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        XPath xpath = XPathFactory.newInstance().newXPath();
        if (xpath == null || builder == null) {
            throw new RuntimeException("Can not determine if fulltext engine is alive");
        }
        SolrPingResponse response = getServer().ping();
        if (response == null) {
            return false;
        }
        return ((String) response.getResponse().get("status")).equals("OK");
    } catch (Exception e) {
        logger.error("can not determine if fulltext engine is alive " + e.getMessage());
        return false;
    }

}

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From source file:com.stevpet.sonar.plugins.dotnet.resharper.customseverities.BaseCustomSeverities.java

/**
 * create xpath and assign the namespace resolver for InspectCode namespace
 * @return xpath//from  www  .  java  2s .  co  m
 */
private XPath createXPathForInspectCode() {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    NamespaceContext inspectCodeNamespaceResolver = new InspectCodeNamespaceResolver();
    xpath.setNamespaceContext(inspectCodeNamespaceResolver);
    return xpath;
}

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From source file:com.persistent.cloudninja.scheduler.DeploymentMonitor.java

/**
 * Parses the response received by making call to REST API.
 * It parses and gets the total no. roles and their instances.
 * /*  w w  w  . j  a  v  a 2s .  c  om*/
 * @param roleInfo
 * @throws ParserConfigurationException
 * @throws SAXException
 * @throws IOException
 * @throws XPathExpressionException
 * @throws ParseException
 */
private void parseRoleInfo(StringBuffer roleInfo) throws ParserConfigurationException, SAXException,
        IOException, XPathExpressionException, ParseException {
    DocumentBuilder docBuilder = null;
    Document doc = null;
    DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
    docBuilderFactory.setIgnoringElementContentWhitespace(true);
    docBuilder = docBuilderFactory.newDocumentBuilder();
    doc = docBuilder.parse(new InputSource(new StringReader(roleInfo.toString())));

    XPathFactory xPathFactory = XPathFactory.newInstance();
    XPath xPath = xPathFactory.newXPath();
    NodeList roleList = (NodeList) xPath.evaluate("/Deployment/RoleList/Role/RoleName", doc,
            XPathConstants.NODESET);
    //get all the roles
    String roleName = null;
    List<String> listRoleNames = new ArrayList<String>();
    for (int i = 0; i < roleList.getLength(); i++) {
        Element element = (Element) roleList.item(i);
        roleName = element.getTextContent();
        RoleEntity roleEntity = roleDao.findByRoleName(roleName);
        if (roleEntity == null) {
            roleEntity = new RoleEntity();
            roleEntity.setName(roleName);
            roleDao.add(roleEntity);
        }
        listRoleNames.add(roleName);
    }

    xPathFactory = XPathFactory.newInstance();
    xPath = xPathFactory.newXPath();
    RoleInstancesEntity roleInstancesEntity = null;
    RoleInstancesId roleInstancesId = null;
    for (String name : listRoleNames) {
        roleList = (NodeList) xPath.evaluate(
                "/Deployment/RoleInstanceList/RoleInstance[RoleName='" + name + "']", doc,
                XPathConstants.NODESET);
        //get no. of instances for WorkerRole
        int noOfInstances = roleList.getLength();
        Calendar calendar = Calendar.getInstance();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S z");
        dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
        String date = dateFormat.format(calendar.getTime());
        roleInstancesId = new RoleInstancesId(dateFormat.parse(date), name);
        roleInstancesEntity = new RoleInstancesEntity(roleInstancesId, noOfInstances, "UPDATE");
        roleInstancesDao.add(roleInstancesEntity);
    }

}

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From source file:eu.impact_project.wsclient.HtmlServiceProvider.java

private NodeList applyXPath(Document doc, String xpathExpression, String namespace) {

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

    if (!namespace.equals(NO_NAMESPACE))
        xpath.setNamespaceContext(new WSDLNamespaceContext());

    XPathExpression expr;//from  w  ww.  j  a  v a 2  s .c  o  m

    Object result = null;
    try {
        expr = xpath.compile(xpathExpression);
        result = expr.evaluate(doc, XPathConstants.NODESET);
    } catch (XPathExpressionException e) {
        e.printStackTrace();
    }

    return (NodeList) result;

}

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From source file:org.dataconservancy.dcs.integration.main.ManualDepositIT.java

/**
 * Ensure that the <code>href</code> attribute values for &lt;collection&gt;s are valid URLs.
 *//* w  w w  .  ja  v a2 s .c o m*/
@Test
public void testServiceDocCollectionUrls() throws IOException, XPathExpressionException {
    final HttpGet req = new HttpGet(serviceDocUrl);
    final HttpResponse resp = client.execute(req);
    assertEquals("Unable to retrieve atompub service document " + serviceDocUrl, 200,
            resp.getStatusLine().getStatusCode());

    final XPath xpath = XPathFactory.newInstance().newXPath();
    xpath.setNamespaceContext(new NamespaceContext() {
        @Override
        public String getNamespaceURI(String prefix) {
            if ("app".equals(prefix) || prefix == null || "".equals(prefix)) {
                return ATOM_NS;
            }
            throw new RuntimeException("Unknown xmlns prefix: '" + prefix + "'");
        }

        @Override
        public String getPrefix(String nsUri) {
            if (ATOM_NS.equals(nsUri)) {
                return "app";
            }
            throw new RuntimeException("Unknown xmlns uri '" + nsUri + "'");
        }

        @Override
        public Iterator<String> getPrefixes(String s) {
            ArrayList<String> prefixes = new ArrayList<String>();
            prefixes.add("app");
            return prefixes.iterator();
        }
    });

    final String xpathExpression = "//app:collection/@href";
    final NodeList collectionHrefs = (NodeList) xpath.evaluate(xpathExpression,
            new InputSource(resp.getEntity().getContent()), XPathConstants.NODESET);

    assertTrue(
            "No atompub collections found in service document " + serviceDocUrl + " (xpath search '"
                    + xpathExpression + "' yielded no results.",
            collectionHrefs != null && collectionHrefs.getLength() > 0);

    for (int i = 0; i < collectionHrefs.getLength(); i++) {
        final String collectionUrl = collectionHrefs.item(i).getNodeValue();
        assertNotNull("atompub collection url was null.", collectionUrl);
        assertTrue("atompub collection url was the empty string.", collectionUrl.trim().length() > 0);
        new URL(collectionUrl);
        assertTrue("Expected atompub collection url to start with " + serviceDocUrl + " (collection url was: "
                + collectionUrl, collectionUrl.startsWith(serviceDocUrl));
    }
}

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From source file:io.selendroid.nativetests.GetWindowSourceTest.java

private Element findElementByXpath(String expr, String source) throws Exception {
    String xml = JsonXmlUtil.toXml(new JSONObject(source));
    InputSource is = new InputSource(new StringReader(xml));
    XPath xPath = XPathFactory.newInstance().newXPath();

    XPathExpression xpathExpr = xPath.compile(expr);
    return (Element) xpathExpr.evaluate(is, XPathConstants.NODE);
}

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From source file:org.opencastproject.remotetest.util.WorkflowUtils.java

/**
 * Parses the workflow instance represented by <code>xml</code> and extracts the workflow identifier.
 * // w  w w . j  a v  a 2s  . c om
 * @param xml
 *          the workflow instance
 * @return the workflow instance
 * @throws Exception
 *           if parsing fails
 */
public static String getWorkflowInstanceId(String xml) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setNamespaceAware(true);
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc = builder.parse(IOUtils.toInputStream(xml, "UTF-8"));
    return ((Element) XPathFactory.newInstance().newXPath().compile("/*").evaluate(doc, XPathConstants.NODE))
            .getAttribute("id");
}

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From source file:eu.smartfp7.terrier.sensor.ParserUtility.java

public static EdgeNodeSnapShot parseShort(InputStream is) throws Exception {

    DocumentBuilderFactory xmlfact = DocumentBuilderFactory.newInstance();
    xmlfact.setNamespaceAware(true);// w w  w. j ava 2s.c o  m
    Document document = xmlfact.newDocumentBuilder().parse(is);

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

    String time = (String) xpath.compile("//crowd/time/text()").evaluate(document, XPathConstants.STRING);

    DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
    Calendar c = Calendar.getInstance();
    ;
    c.setTime(df.parse(time));

    String density = (String) xpath.compile("//crowd/density/text()").evaluate(document, XPathConstants.STRING);

    NodeList list = (NodeList) xpath.compile("//crowd/colour").evaluate(document, XPathConstants.NODESET);
    double[] colors = new double[list.getLength()];
    for (int i = 0; i < list.getLength(); i++) {
        org.w3c.dom.Node colorNode = list.item(i);
        String v = colorNode.getFirstChild().getTextContent();
        colors[i] = new Double(v);
    }

    String activity = (String) xpath.compile("//activity/name/text()").evaluate(document,
            XPathConstants.STRING);

    CrowdReport crowdReport = new CrowdReport(null, new Double(density), 0.0, colors);

    EdgeNodeSnapShot snapShot = new EdgeNodeSnapShot(null, null, c, crowdReport);
    snapShot.setText((activity != null ? activity : StringUtils.EMPTY));

    return snapShot;

}

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From source file:com.seajas.search.utilities.web.WebPages.java

private XPath getXPathEngine() {
    XPath engine = xPathEngine;/*from  w w w.  ja  va  2  s.  c o m*/
    if (engine == null) {
        XPathFactory factory = XPathFactory.newInstance();
        engine = factory.newXPath();
        SimpleNamespaceContext namespaces = new SimpleNamespaceContext();
        namespaces.bindNamespaceUri("ht", "http://www.w3.org/1999/xhtml");
        engine.setNamespaceContext(namespaces);
        xPathEngine = engine;
    }
    return engine;
}

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