Example usage for javax.xml.xpath XPathExpression evaluate

Introduction

In this page you can find the example usage for javax.xml.xpath XPathExpression evaluate.

Prototype

public Object evaluate(InputSource source, QName returnType) throws XPathExpressionException;

Source Link

Document

Evaluate the compiled XPath expression in the context of the specified InputSource and return the result as the specified type.

Usage

From source file:Main.java

/**
 * Return the Element corresponding the the XPath
 * //from w ww  .j  av a2 s . com
 * @param xmlNode
 * @param xpathString
 * @return
 * @throws XPathExpressionException
 */
public static Element getElement(Node xmlNode, String xpathString) throws XPathExpressionException {
    XPathExpression expr = createXPathExpression(xpathString);
    NodeList list;
    list = (NodeList) expr.evaluate(xmlNode, XPathConstants.NODESET);
    if (list.getLength() > 1) {
        throw new RuntimeException("More than one result for XPath: " + xpathString);
    }
    return (Element) list.item(0);
}

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From source file:Main.java

public static String evaluateStringXPath(final Document document, final XPathExpression expression)
        throws XPathExpressionException {
    notNull(document);/*  ww  w. j  a  v a 2s .com*/
    notNull(expression);

    return (String) expression.evaluate(document, XPathConstants.STRING);
}

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From source file:Main.java

/**
 * Get the searchHandler Node from the solrconfig.xml file
 *
 * @param solrconfig/*from   w  ww  .j  av a  2 s. c o m*/
 *            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;
}

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From source file:Main.java

@SuppressWarnings("UseSpecificCatch")
public static boolean saveXML(Document doc, File outfile, boolean indent) {
    try {//www  .j  a  va  2s . c  o m
        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        DOMSource source = new DOMSource(doc);
        StreamResult result = new StreamResult(new OutputStreamWriter(new FileOutputStream(outfile), "UTF-8"));
        if (indent) {
            XPathFactory xpathFactory = XPathFactory.newInstance();
            // XPath to find empty text nodes.
            XPathExpression xpathExp = xpathFactory.newXPath().compile("//text()[normalize-space(.) = '']");
            NodeList emptyTextNodes = (NodeList) xpathExp.evaluate(doc, XPathConstants.NODESET);

            // Remove each empty text node from document.
            for (int i = 0; i < emptyTextNodes.getLength(); i++) {
                Node emptyTextNode = emptyTextNodes.item(i);
                emptyTextNode.getParentNode().removeChild(emptyTextNode);
            }
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
        }
        transformer.transform(source, result);
        return true;
    } catch (Exception ex) {
        return false;
    }
}

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From source file:Main.java

public static String xPathSearch(String input, String expression) throws Exception {
    DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    XPath xPath = XPathFactory.newInstance().newXPath();
    XPathExpression xPathExpression = xPath.compile(expression);
    Document document = documentBuilder.parse(new ByteArrayInputStream(input.getBytes("UTF-8")));
    String output = (String) xPathExpression.evaluate(document, XPathConstants.STRING);
    return output == null ? "" : output.trim();
}

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From source file:Main.java

public static NodeList selectNodeList(Node node, String str) throws XPathExpressionException {
    XPathExpression xPathExpression = null;
    NodeList nList = null;//from  w w w.j a  va2s.c om

    synchronized (getXPathBuilder()) {
        xPathExpression = getXPathBuilder().compile(str);

        nList = (NodeList) xPathExpression.evaluate(node, XPathConstants.NODESET);
    }

    return nList;
}

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From source file:Main.java

public static final String[] executeXPathExpression(InputSource inputSource, String xpathExpression,
        String namespace) throws XPathExpressionException, SAXException, IOException,
        ParserConfigurationException, TransformerException {

    // optional namespace spec: xmlns:prefix:URI
    String nsPrefix = null;//www. ja v  a 2s  .c om
    String nsUri = null;
    if (namespace != null && namespace.startsWith("xmlns:")) {
        String[] nsDef = namespace.substring("xmlns:".length()).split("=");
        if (nsDef.length == 2) {
            nsPrefix = nsDef[0];
            nsUri = nsDef[1];
        }
    }

    // Parse XML to DOM
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    dbFactory.setNamespaceAware(true);
    Document doc = dbFactory.newDocumentBuilder().parse(inputSource);

    // Find nodes by XPATH
    XPathFactory xpFactory = XPathFactory.newInstance();
    XPath xpath = xpFactory.newXPath();

    // namespace?
    if (nsPrefix != null) {
        final String myPrefix = nsPrefix;
        final String myUri = nsUri;
        xpath.setNamespaceContext(new NamespaceContext() {
            public String getNamespaceURI(String prefix) {
                return myPrefix.equals(prefix) ? myUri : null;
            }

            public String getPrefix(String namespaceURI) {
                return null; // we are not using this.
            }

            public Iterator<?> getPrefixes(String namespaceURI) {
                return null; // we are not using this.
            }
        });
    }

    XPathExpression expr = xpath.compile(xpathExpression);
    NodeList nodes = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);

    List<String> lines = new ArrayList<>();

    for (int i = 0; i < nodes.getLength(); i++) {
        lines.add((indenting(nodes.item(i))));
    }

    return lines.toArray(new String[lines.size()]);

}

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From source file:es.upv.grycap.coreutils.fiber.test.mockserver.ObjectResponseValidator.java

@Nullable
private static String readObjectIdFromXml(final String payload)
        throws SAXException, IOException, ParserConfigurationException, XPathExpressionException {
    final Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder()
            .parse(new ByteArrayInputStream(payload.getBytes()));
    final XPath xPath = XPathFactory.newInstance().newXPath();
    final XPathExpression xPathExpression = xPath.compile("//*/coreutils/objectId/text()");
    return trimToNull((String) xPathExpression.evaluate(document, STRING));
}

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From source file:com.github.radium226.github.maven.MetaDataDownloader.java

public static String evaluateXPath(InputStream pomInputStream, String expression)
        throws XPathExpressionException {
    XPathFactory xPathFactory = XPathFactory.newInstance();
    XPath xPath = xPathFactory.newXPath();
    xPath.setNamespaceContext(new NamespaceContext() {

        @Override/*  ww w  .j  a v  a  2  s. com*/
        public String getNamespaceURI(String prefix) {
            if (prefix.equals("ns")) {
                return "http://maven.apache.org/POM/4.0.0";
            }

            return null;
        }

        @Override
        public String getPrefix(String namespaceURI) {
            return null;
        }

        @Override
        public Iterator getPrefixes(String namespaceURI) {
            return null;
        }
    });
    XPathExpression xPathExpression = xPath.compile(expression);
    String version = (String) xPathExpression.evaluate(new InputSource(pomInputStream), XPathConstants.STRING);
    return version;
}

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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);/*ww w  .ja  va 2 s  .c  o m*/
    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);
}

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