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

public static XPath createXPath() {
    XPathFactory factory = XPathFactory.newInstance();
    return factory.newXPath();
}

From source file:Main.java

public static String evaluate(File xmlFile, String xPathExpression) {
    String result = null;//from   w  w w.  ja  v  a 2s .com

    try {
        XPathFactory factory = XPathFactory.newInstance();
        XPath xPath = factory.newXPath();
        result = xPath.evaluate(xPathExpression, new InputSource(new FileInputStream(xmlFile)));
    } catch (Exception ex) {
        System.out.println(ex.getMessage());
    }

    return result;
}

From source file:Main.java

/**
 * Returns a single node that matches the given XPath expression.
 * /* ww  w  .  jav  a2 s. c  o m*/
 * @param doc
 *            Document that contains the nodes.
 * @param expression
 *            XPath expression to be matched.
 * @return Returns a single node matching the given expression.
 */
public static Node selectSingleNode(Document doc, String expression) {
    try {
        XPath xpath = XPathFactory.newInstance().newXPath();

        return (Node) xpath.evaluate(expression, doc, XPathConstants.NODE);
    } catch (XPathExpressionException e) {
        // ignore
    }

    return null;
}

From source file:Main.java

/**
 * Uses the passed XPath expression to locate a single node in the passed element.
 * @param targetNode The node to search.
 * @param expression The XPath expression.
 * @return The located node or null if one is not found.
 *///  w w  w .  j  a  va2s.c  om
public static Node xGetNode(Node targetNode, String expression) {
    Node node = null;
    XPath xpath = null;
    try {
        xpath = XPathFactory.newInstance().newXPath();
        XPathExpression xpathExpression = xpath.compile(expression);
        node = (Node) xpathExpression.evaluate(targetNode, NODE);
        return node;
    } catch (Exception e) {
        throw new RuntimeException("XPath:Failed to locate the node:" + expression, e);
    }
}

From source file:Main.java

public static Object selectObject(Document xmlDocument, String expression, QName returnType)
        throws XPathExpressionException {
    XPath xPath = XPathFactory.newInstance().newXPath();

    return xPath.compile(expression).evaluate(xmlDocument, returnType);
}

From source file:Main.java

/**
 * Select node list what matches given xpath query
 *
 * @param doc        xml document/*from ww  w.  j a v a 2  s . c o  m*/
 * @param expression xpath query
 * @return nodes which confirms given xpath query.
 * @throws XPathExpressionException in case of any errors.
 */
public static NodeList query(final Document doc, final String expression) throws XPathExpressionException {
    final XPath xpath = XPathFactory.newInstance().newXPath();
    return (NodeList) xpath.evaluate(expression, doc.getDocumentElement(), XPathConstants.NODESET);
}

From source file:Main.java

public static Object evaluateXpath(String expression, Object node, QName returnType, NamespaceContext nsContext)
        throws XPathExpressionException {
    XPathFactory xpathFactory = XPathFactory.newInstance();
    XPath xpath = xpathFactory.newXPath();
    if (nsContext != null) {
        xpath.setNamespaceContext(nsContext);
    }/*  ww w  . j a  v  a  2s.com*/

    return xpath.evaluate(expression, node, returnType);
}

From source file:Main.java

public static Object getXPath(Node node, String xPathString, QName returnType) throws XPathExpressionException {
    XPathFactory xPathFactory = XPathFactory.newInstance();
    XPath xPath = xPathFactory.newXPath();
    XPathExpression expression = xPath.compile(xPathString);
    return expression.evaluate(node, returnType);
}

From source file:Main.java

public static String getValueAsString(String filePath, String value)
        throws ParserConfigurationException, SAXException, IOException {
    String id = null;/* www  .  j  a  v a 2s. c  o m*/
    XPathFactory xpathFactory = XPathFactory.newInstance();
    XPath xpath = xpathFactory.newXPath();
    try {
        XPathExpression expr = xpath.compile(value);
        id = (String) expr.evaluate(getDoc(filePath), XPathConstants.STRING);
    } catch (XPathExpressionException e) {
        e.printStackTrace();
    }

    return id;
}

From source file:Main.java

public static Object execXpathGetNodeList(String srcXmlString, String xPath) {
    Object result = null;/*from   www .j  a  v a  2s . 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.NODESET);
    } catch (Exception ex) {
        logger.error(ex);
    }
    return result;
}