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 NodeList getXpathExpressionNodeList(Object xprContext, String xpExpression)
        throws XPathExpressionException {
    XPath xpath = XPathFactory.newInstance().newXPath();

    XPathExpression xpe = xpath.compile(xpExpression);
    NodeList nodes = (NodeList) xpe.evaluate(xprContext, XPathConstants.NODESET);
    return nodes;
}

From source file:Main.java

public static String[] xpathOnString(String q, String stringdoc) {
    try {/*from  w w  w  . j  a v  a 2 s  . c  o m*/
        DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
        // domFactory.setNamespaceAware(true);
        DocumentBuilder builder = domFactory.newDocumentBuilder();
        Document doc = builder.parse(new ByteArrayInputStream(stringdoc.getBytes()));

        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        XPathExpression expr = xpath.compile(q);

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

        String res[] = new String[nodes.getLength()];
        for (int i = 0; i < nodes.getLength(); i++) {
            // System.out.println(nodes.item(i).toString());
            res[i] = nodes.item(i).getNodeValue();
        }
        return res;
    } catch (Exception e) {
        System.out.println("XPathUtils.xpathOnString:caught:" + e);
        return null;
    }
}

From source file:Main.java

public static String getXpathExpressionValue(Object xprContext, String xpExpression)
        throws XPathExpressionException {
    XPath xpath = XPathFactory.newInstance().newXPath();

    XPathExpression xpe = xpath.compile(xpExpression);
    Node valueNode = (Node) xpe.evaluate(xprContext, XPathConstants.NODE);
    String value = null;// ww  w  .j av  a  2s .  c  om
    if (valueNode != null)
        value = valueNode.getNodeValue();
    if (value != null) {
        // if the node is a text node - then we trim and (potentially) look for CDATA
        if (valueNode.getNodeType() == Node.TEXT_NODE) {
            value = value.trim();

            // look for CDATA if we got nothing (stupid whitespace)
            if (value.length() == 0) {
                Node siblingForCDATA = valueNode.getNextSibling();
                if (siblingForCDATA.getNodeType() == Node.CDATA_SECTION_NODE) {
                    value = siblingForCDATA.getNodeValue();
                }
            }
        }
    }

    return value;
}

From source file:Main.java

public static XPathExpression buildXPath(String path, Map<String, String> map) {
    XPathFactory xPathfactory = XPathFactory.newInstance();
    XPath xpath = xPathfactory.newXPath();
    if (map != null)
        xpath.setNamespaceContext(new NamespaceContext() {

            public Iterator getPrefixes(String namespaceURI) {
                throw new UnsupportedOperationException();
            }//from  w w w. ja v  a2 s  .  c om

            public String getPrefix(String namespaceURI) {
                throw new UnsupportedOperationException();
            }

            public String getNamespaceURI(String prefix) {
                Objects.requireNonNull(prefix);
                if (map.containsKey(prefix))
                    return map.get(prefix);
                return XMLConstants.NULL_NS_URI;
            }
        });

    try {
        return xpath.compile(path);
    } catch (XPathExpressionException e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

/**
 * Returns an {@link javax.xml.xpath.XPathExpression} from a string.
 *
 * @param xpathString the XPath string// ww  w.j  ava2 s. c o  m
 * @return the {@link javax.xml.xpath.XPathExpression}
 * @throws XPathExpressionException if the given XPath expression is incorrect
 */
public static XPathExpression getXPathExpression(String xpathString) throws XPathExpressionException {

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

    return xpath.compile(xpathString);
}

From source file:Main.java

public static String getNodeTextByXPath(Document doc, String xpath) {
    try {/*w w  w.  j  a  va  2s  .  com*/
        XPathFactory factory = XPathFactory.newInstance();
        XPath xpathEn = factory.newXPath();
        return xpathEn.evaluate(xpath, doc);
    } catch (Exception ex) {
        ex.printStackTrace();
        return "";
    }
}

From source file:Main.java

private static void removeEmptyTextNodes(final Document document) throws XPathExpressionException {
    final XPath xPath = XPathFactory.newInstance().newXPath();
    final NodeList nodeList = (NodeList) xPath.evaluate("//text()[normalize-space()='']", document,
            XPathConstants.NODESET);

    for (int i = 0; i < nodeList.getLength(); ++i) {
        final Node node = nodeList.item(i);
        node.getParentNode().removeChild(node);
    }/*from www . ja  va  2s .  c  om*/
}

From source file:Main.java

public static NodeList getNodeListViaXPath(String xpathExpr, String xml) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc = builder.parse(xml);
    XPathFactory xPathfactory = XPathFactory.newInstance();
    XPath xpath = xPathfactory.newXPath();
    XPathExpression expr = xpath.compile(xpathExpr);

    NodeList nl = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);

    return nl;//from w  w w .j a  v a 2  s . c om
}

From source file:Main.java

/**
 * //from  w w  w.  j a  v a 2  s.  c o m
 * @param xPath
 * @throws Exception - if path invalid.
 */
public static void isLegalXPath(final String xPath) throws Exception {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    xpath.compile(xPath);
}

From source file:Main.java

/**
 * Query xml result./*from  w  w  w . j  av  a  2s  .c  om*/
 * 
 * @param doc
 *            the doc
 * @param xpathExpression
 *            the xpath expression
 * @return the object
 */
public static NodeList queryXMLResult(Document doc, String xpathExpression) {
    // Document doc = getDocument(result);
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    NodeList XmlResult = null;
    try {
        XPathExpression expr = xpath.compile(xpathExpression);
        XmlResult = evaluateXpath(doc, expr);
    } catch (XPathExpressionException e) {
        e.printStackTrace();
    }

    return XmlResult;
}