convenience method to directly get the text content of an element from an XPAth. - Android XML

Android examples for XML:XPath

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Description

convenience method to directly get the text content of an element from an XPAth.

Demo Code


//package com.java2s;

import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;

import org.w3c.dom.Document;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    /**/*from w ww. ja  v  a2s . c o m*/
     * convenience method to directly get the text content of an element from an XPAth.
     * Better to use when you know that evaluating the xpath only returns one item.
     * @param DOM
     * @param xpath
     * @return the string value of the XML Node obtained by evaluating the XPath against the Document.
     */
    public static String getElementContentFromXPath(Document DOM,
            XPathExpression xpath) {

        try {
            Node thenode = evaluateXPath(DOM, xpath).item(0);
            if (thenode != null)
                return thenode.getNodeValue();
            else
                return "";
        } catch (XPathExpressionException e) {
            return "";
        }

    }

    /**
     *  convenience method to evaluate an xpath expression against a DOM document
     * @param DOM the document
     * @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;
    }
}

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