Example usage for javax.xml.xpath XPathFactory newXPath

List of usage examples for javax.xml.xpath XPathFactory newXPath

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Introduction

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

Prototype

public abstract XPath newXPath();

Source Link

Document

Return a new XPath using the underlying object model determined when the XPathFactory was instantiated.

Usage

From source file:de.mpg.mpdl.inge.xmltransforming.TestBase.java

/**
 * Return the list of children of the node selected by the xPath.
 * //from w  w w .  j  a va  2  s. co  m
 * @param node The node.
 * @param xpathExpression The xPath.
 * @return The list of children of the node selected by the xPath.
 * @throws TransformerException If anything fails.
 */
public static NodeList selectNodeList(final Node node, final String xpathExpression)
        throws TransformerException {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xPath = factory.newXPath();
    try {
        return (NodeList) xPath.evaluate(xpathExpression, node, XPathConstants.NODESET);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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.
 * //from w w w. j  av  a 2 s .  co  m
 * @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);
    }

}

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 ww  w .  j a  va2s . co m

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

    return (NodeList) result;

}

From source file:XPathTest.java

public XPathFrame() {
        setTitle("XPathTest");

        JMenu fileMenu = new JMenu("File");
        JMenuItem openItem = new JMenuItem("Open");
        openItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                openFile();//from   www.j a v a2s .  c om
            }
        });
        fileMenu.add(openItem);

        JMenuItem exitItem = new JMenuItem("Exit");
        exitItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                System.exit(0);
            }
        });
        fileMenu.add(exitItem);

        JMenuBar menuBar = new JMenuBar();
        menuBar.add(fileMenu);
        setJMenuBar(menuBar);

        ActionListener listener = new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                evaluate();
            }
        };
        expression = new JTextField(20);
        expression.addActionListener(listener);
        JButton evaluateButton = new JButton("Evaluate");
        evaluateButton.addActionListener(listener);

        typeCombo = new JComboBox(new Object[] { "STRING", "NODE", "NODESET", "NUMBER", "BOOLEAN" });
        typeCombo.setSelectedItem("STRING");

        JPanel panel = new JPanel();
        panel.add(expression);
        panel.add(typeCombo);
        panel.add(evaluateButton);
        docText = new JTextArea(10, 40);
        result = new JTextField();
        result.setBorder(new TitledBorder("Result"));

        add(panel, BorderLayout.NORTH);
        add(new JScrollPane(docText), BorderLayout.CENTER);
        add(result, BorderLayout.SOUTH);

        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            builder = factory.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            JOptionPane.showMessageDialog(this, e);
        }

        XPathFactory xpfactory = XPathFactory.newInstance();
        path = xpfactory.newXPath();
        pack();
    }

From source file:it.isti.cnr.hpc.europeana.hackthon.domain.DbpediaMapper.java

private boolean load(String query) throws EntityException, NoResultException {

    boolean success = true;

    label = "";//from ww  w.  ja va  2s . c  om
    description = "";
    String queryUrl = produceQueryUrl(query);

    try {
        Document response = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(queryUrl);

        if (response != null) {

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

            NodeList nodes = (NodeList) xPath.evaluate("/ArrayOfResult/Result", response,
                    XPathConstants.NODESET);

            if (nodes.getLength() != 0) {

                // WE TAKE THE FIRST ENTITY FROM DBPEDIA
                label = ((String) xPath.evaluate("Label", nodes.item(0), XPathConstants.STRING));

                description = ((String) xPath.evaluate("Description", nodes.item(0), XPathConstants.STRING))
                        .toLowerCase();

                NodeList classesList = (NodeList) xPath.evaluate("Classes/Class", nodes.item(0),
                        XPathConstants.NODESET);

                classes = new ArrayList<String>(classesList.getLength());
                for (int i = 0; i < classesList.getLength(); i++) {
                    Node n = classesList.item(i);
                    String clazz = (String) xPath.evaluate("Label", n, XPathConstants.STRING);
                    classes.add(clazz);
                }
            }
            if (label.isEmpty()) {
                success = false;
                label = query;
            }

        }
    } catch (Exception e) {
        logger.error("Error during the mapping of the query " + query + " on dbPedia (" + e.toString() + ")");

        if (e.toString().contains("sorry")) {
            try {
                Thread.sleep(60000 * 5);
            } catch (InterruptedException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
        }
        success = false;

    } catch (Error e) {
        logger.error("Error during the mapping of the query " + query + " on dbPedia (" + e.toString() + ")");
        if (e.toString().contains("sorry")) {
            try {
                Thread.sleep(60000 * 5);
            } catch (InterruptedException e1) {
                throw new EntityException("Error during the mapping of the query " + query + " on dbPedia ("
                        + e.toString() + ")");
            }
        }
        success = false;

    }

    if (!success) {
        throw new NoResultException("mapping to dbpedia failed for query " + query);
    }
    return success;
}

From source file:com.oracle.tutorial.jdbc.RSSFeedsTable.java

public void addRSSFeed(String fileName) throws ParserConfigurationException, SAXException, IOException,
        XPathExpressionException, TransformerConfigurationException, TransformerException, SQLException {
    // Parse the document and retrieve the name of the RSS feed

    String titleString = null;/*w w  w.ja  v a 2 s.co  m*/

    javax.xml.parsers.DocumentBuilderFactory factory = javax.xml.parsers.DocumentBuilderFactory.newInstance();
    factory.setNamespaceAware(true);
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc = builder.parse(fileName);

    XPathFactory xPathfactory = XPathFactory.newInstance();

    XPath xPath = xPathfactory.newXPath();

    Node titleElement = (Node) xPath.evaluate("/rss/channel/title[1]", doc, XPathConstants.NODE);

    if (titleElement == null) {
        System.out.println("Unable to retrieve title element");
        return;
    } else {
        titleString = titleElement.getTextContent().trim().toLowerCase().replaceAll("\\s+", "_");
        System.out.println("title element: [" + titleString + "]");
    }

    System.out.println(JDBCTutorialUtilities.convertDocumentToString(doc));

    PreparedStatement insertRow = null;
    SQLXML rssData = null;

    System.out.println("Current DBMS: " + this.dbms);

    try {
        if (this.dbms.equals("mysql")) {
            // For databases that support the SQLXML data type, this creates a
            // SQLXML object from org.w3c.dom.Document.

            System.out.println("Adding XML file " + fileName);
            String insertRowQuery = "insert into RSS_FEEDS (RSS_NAME, RSS_FEED_XML) values" + " (?, ?)";
            insertRow = con.prepareStatement(insertRowQuery);
            insertRow.setString(1, titleString);

            System.out.println("Creating SQLXML object with MySQL");
            rssData = con.createSQLXML();
            System.out.println("Creating DOMResult object");
            DOMResult dom = (DOMResult) rssData.setResult(DOMResult.class);
            dom.setNode(doc);

            insertRow.setSQLXML(2, rssData);
            System.out.println("Running executeUpdate()");
            insertRow.executeUpdate();

        }

        else if (this.dbms.equals("derby")) {

            System.out.println("Adding XML file " + fileName);
            String insertRowQuery = "insert into RSS_FEEDS (RSS_NAME, RSS_FEED_XML) values"
                    + " (?, xmlparse(document cast (? as clob) preserve whitespace))";
            insertRow = con.prepareStatement(insertRowQuery);
            insertRow.setString(1, titleString);
            String convertedDoc = JDBCTutorialUtilities.convertDocumentToString(doc);
            insertRow.setClob(2, new StringReader(convertedDoc));

            System.out.println("Running executeUpdate()");
            insertRow.executeUpdate();

        }

    } catch (SQLException e) {
        JDBCTutorialUtilities.printSQLException(e);
    } catch (Exception ex) {
        System.out.println("Another exception caught:");
        ex.printStackTrace();
    }

    finally {
        if (insertRow != null) {
            insertRow.close();
        }
    }
}

From source file:org.ala.harvester.WikipediaImageHarvester.java

private String getSingleXPathValue(Document currentResDom, String xpathAsString) throws Exception {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();

    return (String) xpath.evaluate(xpathAsString, currentResDom, XPathConstants.STRING);
}

From source file:pl.psnc.synat.wrdz.mdz.format.FileFormatVerifierBean.java

/**
 * Returns the nodes from the given xml document that match the given xpath expression.
 * //w  w  w  . ja  v  a2s. com
 * @param document
 *            xml document to search
 * @param path
 *            xpath expression
 * @return matching nodes
 */
private NodeList xpath(Document document, String path) {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    xpath.setNamespaceContext(new NamespaceContextImpl(NS_PREFIX, NS_URI));

    try {
        return (NodeList) xpath.evaluate(path, document, XPathConstants.NODESET);
    } catch (XPathExpressionException e) {
        throw new RuntimeException("Incorrect XPath expression", e);
    }
}

From source file:org.apache.manifoldcf.agents.output.opensearchserver.OpenSearchServerConnection.java

protected String checkXPath(String xPathQuery) throws ManifoldCFException {
    try {/*from   w  w w  .ja va2s.c o  m*/
        readXmlResponse();
        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        XPathExpression xPathExpr = xpath.compile(xPathQuery);
        return xPathExpr.evaluate(xmlResponse);
    } catch (XPathExpressionException e) {
        throw new ManifoldCFException(e);
    }
}

From source file:org.ala.harvester.WikipediaImageHarvester.java

protected List<String> getXPathValues(Document document, String xpathAsString) throws Exception {

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

    List<String> extractedValues = new ArrayList<String>();
    NodeList nodes = (NodeList) xpath.evaluate(xpathAsString, document, XPathConstants.NODESET);

    for (int i = 0; i < nodes.getLength(); i++) {
        String value = (nodes.item(i)).getNodeValue().trim();
        value = StringUtils.trimToNull(value);
        if (value != null) {
            extractedValues.add(value);//from   ww  w  . ja  va2 s .  com
        }
    }
    return extractedValues;
}