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

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 getValueByXpath(Node doc, String xquery) {
    try {/*from  w ww  .j  a v a  2  s  . c o  m*/
        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        XPathExpression expression = xpath.compile(xquery);
        String result = (String) expression.evaluate(doc, XPathConstants.STRING);
        return result;
    } catch (Exception e) {

    }
    return null;
}

From source file:Main.java

public static NodeList evaluateXPathExpr(XPathExpression xpath, Node node) throws XPathExpressionException {
    return (NodeList) xpath.evaluate(node, XPathConstants.NODESET);
}

From source file:Main.java

public static String getValueAsString(String filePath, String value)
        throws ParserConfigurationException, SAXException, IOException {
    String id = null;//from ww w. j av  a2 s .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

/**
 *  convenience method to evaluate an xpath expression against a DOM document
 * @param DOM the document//from   w  w w.  ja  v  a2s .  co m
 * @param xpath the xpath
 * @return NodeList of retrieved nodes
 * @throws XPathExpressionException
 */
public static NodeList evaluateXPath(Document DOM, XPathExpression xpath) throws XPathExpressionException {

    NodeList result = (NodeList) xpath.evaluate(DOM, XPathConstants.NODESET);

    return result;
}

From source file:Main.java

public static String[] xpathOnString(String q, String stringdoc) {
    try {//w ww .j a v  a  2s .  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 orEmptyStr(XPathExpression xpe, Node n) throws XPathExpressionException {
    Node inner = (Node) xpe.evaluate(n, XPathConstants.NODE);
    return inner == null ? "" : inner.getTextContent();
}

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.
 *//*ww w  .  j a  va  2  s. 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 Element SelectSingleElement(Element parent, String expression) {
    Element element = null;/*from   w  ww.  j  a v a2  s. com*/
    XPath xpath = getXPath();
    try {
        XPathExpression xpathExpression = xpath.compile(expression);
        element = (Element) xpathExpression.evaluate(parent, XPathConstants.NODE);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
    return element;
}

From source file:Main.java

public static final List<Node> selectNodesViaXPath(XPath xPath, Node startingNode, String xPathExpression)
        throws XPathExpressionException {
    List<Node> data = new ArrayList<Node>();
    XPathExpression expression = xPath.compile(xPathExpression);
    Object result = expression.evaluate(startingNode, XPathConstants.NODESET);
    NodeList nodeList = (NodeList) result;
    for (int index = 0; index < nodeList.getLength(); index++) {
        data.add(nodeList.item(index));/*w ww  .j  a v  a2  s .c o m*/
    }
    return data;
}