Example usage for javax.xml.xpath XPathFactory newXPath

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:Main.java

public static Map<String, String> readXmlToMap(String filename, String xpathExp, String arrtibute)
        throws ParserConfigurationException, IOException, SAXException, XPathExpressionException {
    //to-do something
    Map<String, String> dataMap = new HashMap<String, String>();

    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    dbf.setIgnoringElementContentWhitespace(true);

    DocumentBuilder db = dbf.newDocumentBuilder();

    File file = new File(filename);
    if (file.exists()) {
        Document doc = db.parse(file);
        XPathFactory xpathFactory = XPathFactory.newInstance();
        XPath xpath = xpathFactory.newXPath();

        NodeList varList = (NodeList) xpath.evaluate(xpathExp, doc, XPathConstants.NODESET);

        for (int i = 0; i < varList.getLength(); i++) {
            dataMap.put(varList.item(i).getAttributes().getNamedItem(arrtibute).getNodeValue(),
                    varList.item(i).getTextContent());
        }/*from   w w  w  .  j  a va2 s. c o m*/
    }
    return dataMap;
}

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   ww w  .j  ava 2s.  co  m

            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

public static Object execXpathGetNode(String srcXmlString, String xPath) {
    Object result = null;/*  w w  w. ja va 2  s .  c o  m*/
    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

/**
 * Create a map based on a xml file and a xpath expression and an attribute.
 * Treat attribute's value as map's key, treat xpath expression represented node's text content as map's value.
 * //w  w  w. j  a v a2 s .  c om
 * @param xmlFile handled xml file
 * @param xpathExp xpath express, such as "//var"
 * @param arrtibute attribute, such as "name"
 * @return created Map object
 * @throws Exception
 */
public static Map<String, String> readXmlToMap(String xmlFile, String xpathExp, String arrtibute)
        throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setIgnoringElementContentWhitespace(true);

    DocumentBuilder db = factory.newDocumentBuilder();
    Document xmlDoc = null;
    try {
        xmlDoc = db.parse(new File(xmlFile));
    } catch (SAXException e) {
        if ("Premature end of file.".equals(e.getMessage()))
            System.out.println("Maybe your local data file has no content.");
        //e.printStackTrace();
        return new HashMap<String, String>();
    }
    XPathFactory xpathFactory = XPathFactory.newInstance();
    XPath xpath = xpathFactory.newXPath();
    NodeList varList = (NodeList) xpath.evaluate(xpathExp, xmlDoc, XPathConstants.NODESET);
    Map<String, String> dataMap = new HashMap<String, String>();
    for (int i = 0; i < varList.getLength(); i++)
        dataMap.put(varList.item(i).getAttributes().getNamedItem(arrtibute).getNodeValue(),
                varList.item(i).getTextContent());

    return dataMap;
}

From source file:Main.java

public static Object getNodesListXpath(String XpathS, Node node, String nsuri, String pre, QName returnType)
        throws Exception {
    Object matches = null;//from  ww  w.  j  a v  a  2  s .  co m
    // TODO move this to a generic start up method
    System.setProperty("javax.xml.xpath.XPathFactory:" + XPathConstants.DOM_OBJECT_MODEL, XpathFactory);

    XPathFactory xpathFactory = XPathFactory.newInstance(XPathConstants.DOM_OBJECT_MODEL);
    XPath xpath = xpathFactory.newXPath();
    XPathExpression xpe = xpath.compile(XpathS);
    matches = xpe.evaluate(node, returnType);

    return matches;
}

From source file:Main.java

public static void deepCopyDocument(Document ttml, File target) throws IOException {
    try {/*  w  w w  .  j a  v a  2s.c om*/
        XPathFactory xPathfactory = XPathFactory.newInstance();
        XPath xpath = xPathfactory.newXPath();
        XPathExpression expr = xpath.compile("//*/@backgroundImage");
        NodeList nl = (NodeList) expr.evaluate(ttml, XPathConstants.NODESET);
        for (int i = 0; i < nl.getLength(); i++) {
            Node backgroundImage = nl.item(i);
            URI backgroundImageUri = URI.create(backgroundImage.getNodeValue());
            if (!backgroundImageUri.isAbsolute()) {
                copyLarge(new URI(ttml.getDocumentURI()).resolve(backgroundImageUri).toURL().openStream(),
                        new File(target.toURI().resolve(backgroundImageUri).toURL().getFile()));
            }
        }
        copyLarge(new URI(ttml.getDocumentURI()).toURL().openStream(), target);

    } catch (XPathExpressionException e) {
        throw new IOException(e);
    } catch (URISyntaxException e) {
        throw new IOException(e);
    }
}

From source file:Main.java

public static Object getNodesListXpath(String XpathS, Node node, String nsuri, String pre, QName returnType)
        throws Exception {
    Object matches = null;//from  w  ww  .ja v a  2  s. c  om
    // TODO move this to a generic start up method
    //System.setProperty("javax.xml.xpath.XPathFactory:"+ XPathConstants.DOM_OBJECT_MODEL, XpathFactory);

    XPathFactory xpathFactory = XPathFactory.newInstance(XPathConstants.DOM_OBJECT_MODEL);
    XPath xpath = xpathFactory.newXPath();
    XPathExpression xpe = xpath.compile(XpathS);
    matches = xpe.evaluate(node, returnType);

    return matches;
}

From source file:Main.java

private static XPathExpression compile(String path) {
    XPathFactory xPathfactory = XPathFactory.newInstance();
    XPath xpath = xPathfactory.newXPath();
    try {//from   w w  w.jav a2s.c  o m
        return xpath.compile(path);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

/**
 * Evaluates the XPath expression against the <code>xml</code> and returns the selected nodes.
 * //from  www  .java2s.  c  o  m
 * @param expression Expression to evaluate.
 * @param xml The xml to query.
 * @return The selected nodes.
 * @throws XPathExpressionException If an error occurs evaluating the expression.
 */
public static NodeList getNodes(final String expression, final String xml) throws XPathExpressionException {
    final InputSource source = new InputSource(new StringReader(xml));
    final XPathFactory factory = XPathFactory.newInstance();
    final XPath xpath = factory.newXPath();
    return (NodeList) xpath.evaluate(expression, source, XPathConstants.NODESET);
}

From source file:com.thoughtworks.go.util.XpathUtils.java

public static boolean nodeExists(InputSource inputSource, String xpath) throws XPathExpressionException {
    XPathFactory factory = XPathFactory.newInstance();
    XPathExpression expression = factory.newXPath().compile(xpath);
    Boolean b = (Boolean) expression.evaluate(inputSource, XPathConstants.BOOLEAN);
    return b != null && b;
}