Java XPath Select selectSingleNode(final Node sourceNode, final String xPathExpression)

Description

select Single Node

License

Apache License

Declaration

public static Node selectSingleNode(final Node sourceNode, final String xPathExpression) 

Method Source Code

//package com.java2s;
/*//from  www.jav a 2 s.c o m
 *   Copyright 2002-2012 George Norman
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Node;

public class Main {
    public static Node selectSingleNode(final Node sourceNode, final String xPathExpression) {
        Node result;
        XPathFactory factory = XPathFactory.newInstance(); // http://www.ibm.com/developerworks/library/x-javaxpathapi/index.html
        XPath xPathParser = factory.newXPath();

        try {
            result = (Node) xPathParser.evaluate(xPathExpression, sourceNode, XPathConstants.NODE);
        } catch (XPathExpressionException e) {
            result = null;
        }

        return result;
    }
}

Related

1. selectNodes(String xpath, Object node)
2. selectNodesViaXPath(XPath xPath, Node startingNode, String xPathExpression)
3. selectNodeText(Node node, String expression)
4. selectSingleElement(Element element, String xpathExpression)
5. selectSingleNode(final Node node, final String xPath)
6. selectSingleNode(Node node, String xpath, NamespaceContext context)
7. selectString(String xpath, Object node)
8. selectStrings(String xpath, Object node)
9. selectXPathString(final String xPath, final Node inNode, final String nsuri, final String pre)