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 getNogeList(String path, Node node) throws RuntimeException {
    path = path.trim();//from ww w  . j a  v  a2  s . co  m
    try {
        XPath xp = XPathFactory.newInstance().newXPath();
        XPathExpression expr = xp.compile(path);

        NodeList lst = (NodeList) expr.evaluate(node, XPathConstants.NODESET);
        return lst;

    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
}

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 w  ww. ja va2 s.c om*/
    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

/**
 * <p>/*from  w w  w .  j  a va2s. c o  m*/
 * Evaluates the given XPath expression in the context of the given item, with
 * the expectation of a node result.
 * </p>
 * 
 * @param xpe
 *          An XPath expression.
 * @param item
 *          A context item.
 * @return The result of the evaluation as a {@link Node} instance.
 * @throws XPathExpressionException
 *           if the evaluation fails
 * @since 1.67.5
 * @see XPathConstants#NODE
 */
public static Node evaluateNode(XPathExpression xpe, Object item) throws XPathExpressionException {
    return (Node) xpe.evaluate(item, XPathConstants.NODE);
}

From source file:Main.java

private static List<String> getEmployeeNameWithAge(Document doc, XPath xpath, int age) throws Exception {
    List<String> list = new ArrayList<>();
    XPathExpression expr = xpath.compile("/Employees/Employee[age>" + age + "]/name/text()");
    NodeList nodes = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
    for (int i = 0; i < nodes.getLength(); i++)
        list.add(nodes.item(i).getNodeValue());
    return list;//  w  w  w  .  j  a  v  a2s  .c  om
}

From source file:Main.java

/**
 * <p>/*  ww  w  .  j a v  a 2 s  .c  om*/
 * Evaluates the given XPath expression in the context of the given item, with
 * the expectation of a string result.
 * </p>
 * 
 * @param xpe
 *          An XPath expression.
 * @param item
 *          A context item.
 * @return The result of the evaluation as a {@link String}.
 * @throws XPathExpressionException
 *           if the evaluation fails
 * @since 1.67.5
 * @see XPathConstants#STRING
 */
public static String evaluateString(XPathExpression xpe, Object item) throws XPathExpressionException {
    return (String) xpe.evaluate(item, XPathConstants.STRING);
}

From source file:Main.java

/**
 * <p>//from   w w w . j av  a 2 s  .  c om
 * Evaluates the given XPath expression in the context of the given item, with
 * the expectation of a number (Java <code>double</code>) result.
 * </p>
 * 
 * @param xpe
 *          An XPath expression.
 * @param item
 *          A context item.
 * @return The result of the evaluation as a {@link Double} instance.
 * @throws XPathExpressionException
 *           if the evaluation fails
 * @since 1.67.5
 * @see XPathConstants#NUMBER
 */
public static Double evaluateNumber(XPathExpression xpe, Object item) throws XPathExpressionException {
    return (Double) xpe.evaluate(item, XPathConstants.NUMBER);
}

From source file:Main.java

/**
 * Evaluate xpath./* w  ww.  j a v  a2s  . c o  m*/
 * 
 * @param doc
 *            the doc
 * @param expr
 *            the expr
 * @return the object
 */
public static NodeList evaluateXpath(Document doc, XPathExpression expr) {
    NodeList XmlResult = null;
    try {
        XmlResult = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
    } catch (XPathExpressionException e) {
        e.printStackTrace();
    }
    return XmlResult;
}

From source file:Main.java

/**
 * <p>//  ww  w  .j  ava 2 s  .c  o m
 * Evaluates the given XPath expression in the context of the given item, with
 * the expectation of a boolean result.
 * </p>
 * 
 * @param xpe
 *          An XPath expression.
 * @param item
 *          A context item.
 * @return The result of the evaluation as a {@link Boolean} instance.
 * @throws XPathExpressionException
 *           if the evaluation fails
 * @since 1.67.5
 * @see XPathConstants#BOOLEAN
 */
public static Boolean evaluateBoolean(XPathExpression xpe, Object item) throws XPathExpressionException {
    return (Boolean) xpe.evaluate(item, XPathConstants.BOOLEAN);
}

From source file:Main.java

@SuppressWarnings("unchecked")
private static <T> T evaluateXpath(String expression, Document document, QName dataType) {
    try {//from   ww w .  j  a  va  2  s  . c  o m
        XPath xpath = createXPath();
        XPathExpression compiledExpression = xpath.compile(expression);
        return (T) compiledExpression.evaluate(document, dataType);
    } catch (XPathExpressionException e) {
        throw new IllegalArgumentException("Cannot evaluate XPath expression '" + expression + "'");
    }
}

From source file:Main.java

public static NodeList queryNodeList(Document document, String xPath) {
    try {//  w ww  .jav  a2s.  c  om
        XPathExpression expr = XPathFactory.newInstance().newXPath().compile(xPath);
        return (NodeList) expr.evaluate(document, XPathConstants.NODESET);
    } catch (XPathExpressionException e) {
        throw new IllegalArgumentException(e);
    }
}