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:Main.java

/**
 * Execute an xpath query on a specific node.
 *
 * The type parameter specifies the expected type of the result of the
 * query. Typical types are:/*  www. java 2 s. c  o m*/
 *
 *  XPathContants.NUMBER: A java Double that corresponds to a numeric
 *  literal in the XML document
 *  XPathConstants.STRING: A java String that corresponds to a text literal
 *  in the XML document
 *  XPathConstants.NODESET: A NodeList that contains a list of nodes
 *  in the XML document
 *  XPathConstants.NODE: A particular Node inside the XML document
 *
 * @param doc The node on which the xpath expression is to be executed
 * @param xpath_expr The XPath expression to be executed
 * @param type One of the XPathConstants that specified the expected output.
 * @return The result of the XPath query on the node, of the corresponding
 *         type
 */
@SuppressWarnings("unchecked")
public static <T> T xpath(Node doc, String xpath_expr, QName type) {
    XPathFactory xpathfactory = XPathFactory.newInstance();
    XPath xpath = xpathfactory.newXPath();
    XPathExpression expr;
    try {
        expr = xpath.compile(xpath_expr);
        return (T) expr.evaluate(doc, type);
    } catch (XPathExpressionException e) {
        throw new RuntimeException(e);
    }
}

---

From source file:Main.java

public static boolean updateDBConfig(String userName, String password, String name, String driver, String url,
        String dbConfigPath) throws XPathExpressionException, ParserConfigurationException, SAXException,
        IOException, TransformerException {
    Document document = loadXML(dbConfigPath);

    XPath path = XPathFactory.newInstance().newXPath();
    XPathExpression express = path.compile(
            "//Configure/New[@class='org.eclipse.jetty.plus.jndi.Resource']/Arg/New[@class='bitronix.tm.resource.jdbc.PoolingDataSource']/Set[@name='className']");

    NodeList nodes = (NodeList) express.evaluate(document, XPathConstants.NODESET);
    Node node = nodes.item(0);//from ww w  .  ja  v  a2  s .  co  m
    node.setTextContent(driver);
    path.reset();

    express = path.compile(
            "//Configure/New[@class='org.eclipse.jetty.plus.jndi.Resource']/Arg/New[@class='bitronix.tm.resource.jdbc.PoolingDataSource']/Get['@name=driverProperties']/Put");
    nodes = (NodeList) express.evaluate(document, XPathConstants.NODESET);

    for (int i = 0; i < nodes.getLength(); i++) {
        node = nodes.item(i);
        if ("user".equals(node.getAttributes().item(0).getTextContent())) {
            node.setTextContent(userName);
        } else if ("password".equals(node.getAttributes().item(0).getTextContent())) {
            node.setTextContent(password);
        } else if ("URL".equals(node.getAttributes().item(0).getTextContent())) {
            //            String url = node.getTextContent();
            //            System.out.println("basic url ---> " + url + "; name -->" + name);
            //            url = replaceDBName("examples", name, url);
            //            System.out.println("dist url ---> " + url);
            node.setTextContent(url);
        }
    }
    path.reset();

    return updateXML(document, dbConfigPath);
}

---

From source file:Main.java

public static boolean updatePomDBConfig(String userName, String password, String name, String host, String port,
        String version, String pomPath) throws ParserConfigurationException, SAXException, IOException,
        XPathExpressionException, TransformerException {
    Document document = loadXML(pomPath);
    XPath path = XPathFactory.newInstance().newXPath();
    XPathExpression express = path.compile("//project/properties/mysql.server.version");

    NodeList nodes = (NodeList) express.evaluate(document, XPathConstants.NODESET);
    Node node = nodes.item(0);/*  w  w w . j a va2  s. com*/
    node.setTextContent(version);
    path.reset();

    express = path.compile("//project/properties/mysql.server.host");
    nodes = (NodeList) express.evaluate(document, XPathConstants.NODESET);
    node = nodes.item(0);
    node.setTextContent(host);
    path.reset();

    express = path.compile("//project/properties/mysql.server.port");
    nodes = (NodeList) express.evaluate(document, XPathConstants.NODESET);
    node = nodes.item(0);
    node.setTextContent(port);
    path.reset();

    express = path.compile("//project/properties/mysql.server.database");
    nodes = (NodeList) express.evaluate(document, XPathConstants.NODESET);
    node = nodes.item(0);
    node.setTextContent(name);
    path.reset();

    express = path.compile("//project/properties/mysql.server.user");
    nodes = (NodeList) express.evaluate(document, XPathConstants.NODESET);
    node = nodes.item(0);
    node.setTextContent(userName);
    path.reset();

    express = path.compile("//project/properties/mysql.server.password");
    nodes = (NodeList) express.evaluate(document, XPathConstants.NODESET);
    node = nodes.item(0);
    node.setTextContent(password);
    path.reset();

    return updateXML(document, pomPath);
}

---

From source file:Main.java

private static Document getDoc(String filePath) throws ParserConfigurationException, SAXException, IOException {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setNamespaceAware(true);// w w w  . ja v a 2 s . c  o m
    DocumentBuilder builder = null;
    XPathFactory xpathFactory = XPathFactory.newInstance();
    XPath xpath = xpathFactory.newXPath();
    builder = factory.newDocumentBuilder();
    Document doc = builder.parse(filePath);

    return doc;
}

---

From source file:Main.java

public static String setValueXPath(String srcXmlString, String xPath, String newVal) {
    DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
    domFactory.setNamespaceAware(false); // never forget this!
    int i, j;//from   w w  w  .j  a  v a2 s .co  m
    Document doc = null;
    DocumentBuilder builder = null;
    try {
        builder = domFactory.newDocumentBuilder();
        doc = builder.parse(new ByteArrayInputStream(srcXmlString.getBytes()));
        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        XPathExpression expr = xpath.compile(xPath);

        Object result = expr.evaluate(doc, XPathConstants.NODESET);

        NodeList xPathNodes = (NodeList) result;
        logger.debug("xpath result count: " + xPathNodes.getLength());
        logger.debug(xPathNodes.item(0).getNodeName() + " = " + xPathNodes.item(0).getTextContent());

        // get list of all nodes in doc
        NodeList nodes = doc.getElementsByTagName("*");
        // iterate through all the nodes
        for (i = 0; i < xPathNodes.getLength(); i++) {
            // for each node in xpath result - traverse through all nodes in
            // doc to find match
            for (j = 0; j < nodes.getLength(); j++) {
                if (nodes.item(j).isSameNode(xPathNodes.item(i))) {
                    logger.debug("Old value " + i + ": " + xPathNodes.item(i).getNodeName() + " = "
                            + xPathNodes.item(i).getTextContent());
                    nodes.item(j).setTextContent(newVal);
                    logger.debug("New value " + i + ": " + xPathNodes.item(i).getNodeName() + " = "
                            + xPathNodes.item(i).getTextContent());
                    break;
                }
            }
        }
    } catch (Exception ex) {
        logger.error(ex.getMessage());
        // ex.printStackTrace();
    }
    return getW3CXmlFromDoc(doc);
}

---

From source file:Main.java

/**
 * Locates the attribute defined by the XPath expression in the XML file and replaces it with the passed value.
 * @param fileName The XML file to update.
 * @param xPathExpression An XPath expression that locates the attribute to update.
 * @param attributeName The name of the attribute to update.
 * @param value The value to update the attribute to.
 *//*from   ww  w  . ja v a 2 s. c  o m*/
public static void updateAttributeInXMLFile(String fileName, String xPathExpression, String attributeName,
        String value) {
    try {
        Document document = parseXML(new File(fileName));
        XPath xpath = XPathFactory.newInstance().newXPath();
        XPathExpression xpathExpression = xpath.compile(xPathExpression);
        Element element = (Element) xpathExpression.evaluate(document, NODE);

        element.getAttributeNode(attributeName).setValue(value);
        writeElement(document.getDocumentElement(), fileName);

    } catch (Exception e) {
        throw new RuntimeException("Failed to extract element from:" + fileName, e);
    }
}

---

From source file:Main.java

/**
 * Get the searchHandler Node from the solrconfig.xml file
 *
 * @param solrconfig// w  w  w .j av a2s.  c om
 *            the solrconfig.xml File
 *
 * @return searchHandler XML Node or null if not found
 *
 * @throws ParserConfigurationException
 * @throws SAXException
 * @throws IOException
 * @throws XPathExpressionException
 */
public static Node getSearchHandlerNode(final File solrconfig)
        throws ParserConfigurationException, SAXException, IOException, XPathExpressionException {
    final DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    final DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    final Document docSchem = dBuilder.parse(solrconfig);
    final XPathFactory xPathfactory = XPathFactory.newInstance();
    final XPath xpath = xPathfactory.newXPath();
    final XPathExpression expr = xpath
            .compile("//requestHandler[@class=\"solr.SearchHandler\" and @name=\"/select\"]");
    final Node requestHandler = (Node) expr.evaluate(docSchem, XPathConstants.NODE);
    return requestHandler;
}

---

From source file:Main.java

public static Node selectSingleNode(Node node, String express) {
    Node result = null;/*from  w w w.j a  v  a  2  s  . c  o m*/
    XPathFactory xpathFactory = XPathFactory.newInstance();
    XPath xpath = xpathFactory.newXPath();
    try {
        result = (Node) xpath.evaluate(express, node, XPathConstants.NODE);
    } catch (XPathExpressionException e) {
        e.printStackTrace();
    }

    return result;
}

---

From source file:Main.java

public static Object execXpathGetNode(String srcXmlString, String xPath) {
    Object result = null;/*from w w  w  . j a  va 2 s . c  om*/
    try {
        Document doc = stringToDoc(srcXmlString);
        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        XPathExpression expr = xpath.compile(xPath);
        result = expr.evaluate(doc, XPathConstants.NODE);
    } catch (Exception ex) {
        logger.error(ex);
    }
    return result;
}

---

From source file:Main.java

/**
 * Evaluate an XPath against a Document, returning a String.
 * /*from   w  w  w  .  j av a  2  s .co m*/
 * @param doc Document
 * @param xp XPath to evaluate against Document
 * @return String found at path or null
 */
public static String xpathOrNull(Document doc, String xp) {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    try {
        XPathExpression expr = xpath.compile(xp);
        return expr.evaluate(doc);
    } catch (XPathExpressionException e) {
        return null;
    }
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »