Java XPath Create getXpathExpressionValue(Object xprContext, String xpExpression)

Description

get Xpath Expression Value

License

Open Source License

Declaration

public static String getXpathExpressionValue(Object xprContext, String xpExpression)
            throws XPathExpressionException 

Method Source Code

//package com.java2s;
/*/*from  w  ww .  j  a v a2s  . com*/
    
Copyright (c) 2009-2011, AOL Inc.
All rights reserved.
    
This code is licensed under a BSD license.
    
Howard Uman
    
*/

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Node;

public class Main {
    public static String getXpathExpressionValue(Object xprContext, String xpExpression)
            throws XPathExpressionException {
        XPath xpath = XPathFactory.newInstance().newXPath();

        XPathExpression xpe = xpath.compile(xpExpression);
        Node valueNode = (Node) xpe.evaluate(xprContext, XPathConstants.NODE);
        String value = null;
        if (valueNode != null)
            value = valueNode.getNodeValue();
        if (value != null) {
            // if the node is a text node - then we trim and (potentially) look for CDATA
            if (valueNode.getNodeType() == Node.TEXT_NODE) {
                value = value.trim();

                // look for CDATA if we got nothing (stupid whitespace)
                if (value.length() == 0) {
                    Node siblingForCDATA = valueNode.getNextSibling();
                    if (siblingForCDATA.getNodeType() == Node.CDATA_SECTION_NODE) {
                        value = siblingForCDATA.getNodeValue();
                    }
                }
            }
        }

        return value;
    }
}

Related

1. getXPathExpression(String path)
2. getXPathExpression(String xpath, NamespaceContext namespaceContext)
3. getXPathExpression(String xpathStr)
4. getXPathExpression(String xPathString)
5. getXpathExpressionNode(Object xprContext, String xpExpression)
6. getXPathExprFromNode(Node node)
7. getXPathExprFromNode(Node node)
8. getXPathFactory()
9. getXPathFactory()