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 String getProcessIdFromBpmn(final String bpmn) {
    String processId = null;//from   w  w w. j ava 2  s. com
    try {
        final DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
        domFactory.setNamespaceAware(true);
        final Document doc = domFactory.newDocumentBuilder()
                .parse(new ByteArrayInputStream(bpmn.getBytes("UTF-8")));
        final XPath xpath = XPathFactory.newInstance().newXPath();
        xpath.setNamespaceContext(new NamespaceContext() {
            @Override
            public Iterator<?> getPrefixes(final String namespaceURI) {
                // Not used in this context.
                return null;
            }

            @Override
            public String getPrefix(final String namespaceURI) {
                // Not used in this context.
                return null;
            }

            @Override
            public String getNamespaceURI(final String prefix) {
                // Only require the URI for the bpmn2 NS.
                return BPMN2_NAMESPACE_URI;
            }
        });
        final XPathExpression expr = xpath.compile(BPMN_PROCESS_ID_XPATH_EXPR);

        final Node node = (Node) expr.evaluate(doc, XPathConstants.NODE);
        processId = node.getAttributes().getNamedItem(BPMN_PROCESS_ID_ATTR).getNodeValue();
    } catch (final Exception e) {
        e.printStackTrace();
    }
    return processId;
}

From source file:Main.java

public static NodeList selectNodes(String express, Object source) {
    NodeList result = null;//from ww w  .  j  av  a2s .co  m
    XPathFactory xpathFactory = XPathFactory.newInstance();
    XPath xpath = xpathFactory.newXPath();
    try {
        result = (NodeList) xpath.evaluate(express, source, XPathConstants.NODESET);
    } catch (XPathExpressionException e) {
        e.printStackTrace();
    }

    return result;
}

From source file:Main.java

public static NodeList getNodesByXPath(File file, String xpath) {
    if (!file.isFile() || !file.canRead())
        return null;

    Document document;/*www . j a  v  a  2s.  co  m*/
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();

    try {
        DocumentBuilder documentBuilder = dbFactory.newDocumentBuilder();
        document = documentBuilder.parse(file);
    } catch (ParserConfigurationException e) {
        return null;
    } catch (SAXException e) {
        return null;
    } catch (IOException e) {
        return null;
    }

    if (document == null) {
        return null;
    }

    Object result;
    try {
        XPath xpathCompiler = XPathFactory.newInstance().newXPath();
        XPathExpression xPathExpr = xpathCompiler.compile(xpath);
        result = xPathExpr.evaluate(document, XPathConstants.NODESET);
    } catch (XPathExpressionException e) {
        return null;
    }

    return (NodeList) result;
}

From source file:Main.java

public static ArrayList<Node> getNodesXPath(String srcXmlString, String xPath) {
    DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
    domFactory.setNamespaceAware(false); // never forget this!
    Document doc = null;//from  ww w .ja v a2 s  .  co m
    DocumentBuilder builder = null;
    ArrayList<Node> nodesList = new ArrayList<Node>();
    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());
        // iterate through all the nodes
        for (int i = 0; i < xPathNodes.getLength(); i++) {
            nodesList.add(xPathNodes.item(i));
        }
    } catch (Exception ex) {
        logger.error(ex.getMessage());
    }
    return nodesList;
}

From source file:Main.java

public static String getNodeTextByXPath(Element eoEl, String xpath) {
    try {// w  w w. j  av  a 2  s. c om
        Document doc = newDocument();
        Element importedEl = (Element) doc.importNode(eoEl.cloneNode(true), true);
        doc.appendChild(importedEl);

        XPathFactory factory = XPathFactory.newInstance();
        XPath xpathEn = factory.newXPath();
        return xpathEn.evaluate(xpath, doc);
    } catch (Exception ex) {
        ex.printStackTrace();
        return "";
    }
}

From source file:Main.java

static void getHTTPXml(URL url) throws Exception {
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("POST");
    conn.setRequestProperty("ACCEPT", "application/xml");
    InputStream xml = conn.getInputStream();

    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    org.w3c.dom.Document document = builder.parse(xml);

    System.out.println(document);
    String doctype = conn.getContentType();
    System.out.println(doctype);/* www  .  j a  v a  2s.c o  m*/

    XPathFactory pathFactory = XPathFactory.newInstance();
    XPath path = pathFactory.newXPath();
    XPathExpression expression;
    expression = path.compile("/result/checkid");
    NodeList nodeList = (NodeList) expression.evaluate(document, XPathConstants.NODESET);
    String checkids[] = getNodeValue(nodeList);
    for (String checkid : checkids) {
        System.out.print(checkid + ", ");
    }
    conn.disconnect();
}

From source file:Main.java

private static ThreadLocal<XPath> getXPath() {
    if (xPath == null) {
        xPath = new ThreadLocal<XPath>() {
            @Override//from   w ww.  j a  v a 2 s  .  c  o  m
            protected XPath initialValue() {
                return XPathFactory.newInstance().newXPath();
            }
        };
    }
    return xPath;
}

From source file:Main.java

public static Object read(Node node, String expression, QName returnType) throws XPathExpressionException {
    XPath xpath = XPathFactory.newInstance().newXPath();
    XPathExpression xPathExp = xpath.compile(expression);
    return xPathExp.evaluate(node, returnType);
}

From source file:Main.java

/**
 * Read application-context file, and return fully qualified class name for
 * given <code>beanName</code>
 * /* w w  w  .  j  a  v a  2s  .co m*/
 * @param beanName
 * @return
 * 
 */
public static String getFullyQualifiedClass(String beanName) {

    DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();

    docBuilderFactory.setNamespaceAware(true);

    String nodeValue = "";

    try {
        DocumentBuilder builder = docBuilderFactory.newDocumentBuilder();
        Document doc = builder.parse("application-context.xml");

        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        XPathExpression expr = xpath.compile("//bean[@name='" + beanName + "']/@class");

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

        NodeList nodes = (NodeList) result;
        if (nodes.getLength() > 0) {
            nodeValue = nodes.item(0).getNodeValue();
        }
    } catch (ParserConfigurationException parserConfigurationException) {
        parserConfigurationException.printStackTrace();
    } catch (IOException ioException) {
        ioException.printStackTrace();
    } catch (SAXException saxException) {
        saxException.printStackTrace();
    } catch (XPathExpressionException xPathExpressionException) {
        xPathExpressionException.printStackTrace();
    }

    return nodeValue;
}

From source file:Main.java

public static XPath getSharedXPath() {
    XPath xPath = null;/* w w  w .ja  v a  2s.  c  om*/
    if (sharedXPath != null)
        xPath = sharedXPath.get();
    if (xPath == null) {
        XPathFactory xPathFactory = XPathFactory.newInstance();
        sharedXPath = new SoftReference<XPath>(xPath = xPathFactory.newXPath());
    }
    return xPath;
}