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 getChildNodesByExpression(Document doc, String expression) {
    try {//from  w ww . j av a2  s  . com
        XPath xpath = XPathFactory.newInstance().newXPath();
        XPathExpression expr = xpath.compile(expression);

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

    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;
}

From source file:Main.java

/**
 * Get node from XML document using xpath expression
 * /*ww  w .  j  a va 2s  .co  m*/
 * @param doc
 * @param expression
 * @return
 * @throws XPathExpressionException
 */
public static Node getNode(final Document doc, final String expression) throws XPathExpressionException {
    if (null == expression || expression.isEmpty() || null == doc) {
        return null;
    }
    log.finer("Executing xpath xpression " + expression);
    XPath xPath = XPathFactory.newInstance().newXPath();
    XPathExpression expr = xPath.compile(expression);
    Object result = expr.evaluate(doc, XPathConstants.NODE);
    return (Node) result;
}

From source file:Main.java

/**
 * Get a string from an XPath expression.
 * //from  www. j  av  a2  s .  c o m
 * @param node node
 * @param expr XPath expression
 * @return string
 * @throws XPathExpressionException 
 */
public static String getString(Node node, XPathExpression expr) throws XPathExpressionException {
    return (String) expr.evaluate(node, XPathConstants.STRING);
}

From source file:Main.java

private static NodeList findElements(String xpathExpression, Document doc, XPath xpath) throws Exception {
    NodeList nodes = null;//w  ww .jav  a 2s  .  c o m
    if (doc != null) {
        XPathExpression expr = xpath.compile(xpathExpression);
        Object result = expr.evaluate(doc, XPathConstants.NODESET);
        nodes = (NodeList) result;
    }
    return nodes;
}

From source file:Main.java

/**
 * Get nodelist from XML document using xpath expression
 * //  w  w  w .  j  av a 2 s  .  c o  m
 * @param doc
 * @param expression
 * @return
 * @throws XPathExpressionException
 */
public static NodeList getNodeList(final Document doc, final String expression)
        throws XPathExpressionException {
    if (null == expression || expression.isEmpty() || null == doc) {
        return null;
    }
    log.finer("Executing xpath xpression " + expression);
    XPath xPath = XPathFactory.newInstance().newXPath();
    XPathExpression expr = xPath.compile(expression);
    Object result = expr.evaluate(doc, XPathConstants.NODESET);
    return (NodeList) result;
}

From source file:Main.java

public static Object execXpathGetNodeList(String srcXmlString, String xPath) {
    Object result = null;//from   w  ww .  j a v a2s  .co m
    try {
        Document doc = stringToDoc(srcXmlString);
        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        XPathExpression expr = xpath.compile(xPath);
        result = expr.evaluate(doc, XPathConstants.NODESET);
    } catch (Exception ex) {
        logger.error(ex);
    }
    return result;
}

From source file:Main.java

/**
 * /*from   w w  w.  j a  va  2 s . co m*/
 * @param xPathS
 * @param node
 * @param nsuri
 * @param pre
 * @param returnType
 * @return Return type is one of XPathConstants .BOOLEAN, .NODE, .NODESET,
 *         .NUMBER, .STRING
 * @throws Exception
 */
public static Object getNodesListXpath(final String xPathS, final Node node, final String nsuri,
        final String pre, final QName returnType) throws Exception {
    Object matches = null;
    System.setProperty("javax.xml.xpath.XPathFactory:" + XPathConstants.DOM_OBJECT_MODEL, XPATH_FACTORY);

    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 NodeList getNodes(final Object doc, final String query) throws XPathExpressionException {
    final XPath xpath = XPathFactory.newInstance().newXPath();
    final XPathExpression expr = xpath.compile(query);
    return (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
}

From source file:Main.java

public static NodeList getNodes(final Document doc, final String query) throws XPathExpressionException {
    final XPath xpath = XPathFactory.newInstance().newXPath();
    final XPathExpression expr = xpath.compile(query);
    return (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
}

From source file:Main.java

private static Node getNodeById(Document doc, String id) throws XPathExpressionException {
    XPath xpath = XPathFactory.newInstance().newXPath();
    XPathExpression expr = xpath.compile("//" + MESSAGE + "[@id='" + id + "']");
    return (Node) expr.evaluate(doc, XPathConstants.NODE);
}