Constructs a XPath query to the supplied node. - Java XML

Java examples for XML:XPath

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Description

Constructs a XPath query to the supplied node.

Demo Code

/**/*from w  ww .  jav  a 2 s.  c  o m*/
 * Utility class for dealing with XML DOM elements.
 * 
 * ********************************************************************* ***
 * DISCLAIMER *** This code is covered by the Creative Commons Attribution 2.5
 * License (http://creativecommons.org/licenses/by/2.5/).
 * 
 * You may use this code in any way you see fit as long as you realize that the
 * code is provided AS IS without any warrenties and confers to rights what so
 * ever! The author cannot be held accountable for any loss, direct or indirect,
 * afflicted by using the code.
 * 
 * *********************************************************************
 * 
 * 
 * @author Mikkel Heisterberg, lekkim@lsdoc.org
 */
//package com.java2s;
import java.util.ArrayList;
import java.util.Iterator;
import org.w3c.dom.Node;

public class Main {
    /**
     * Constructs a XPath query to the supplied node.
     * 
     * @param n
     * @return
     */
    public static String getXPath(Node n) {
        if (null == n) {
            throw new IllegalArgumentException("Invalid node");
        }

        ArrayList<Node> hierarchy = new ArrayList<Node>();
        StringBuffer buffer = new StringBuffer();
        Node parent = null;

        // Push parent element's on stack
        hierarchy.add(n);
        parent = n.getParentNode();
        while (parent != null && parent.getNodeType() != Node.DOCUMENT_NODE) {
            hierarchy.add(0, parent);
            parent = parent.getParentNode();
        }

        Iterator<Node> i = hierarchy.iterator();
        while (i.hasNext()) {
            Node node = i.next();
            buffer.append("/");
            buffer.append(node.getNodeName());
            if (node.hasAttributes()) {
                Node uuid = node.getAttributes().getNamedItem("uuid");
                if (uuid != null) {
                    buffer.append("[@uuid='");
                    buffer.append(uuid.getNodeValue());
                    buffer.append("']");
                }
            }
        }

        // return buffer
        return buffer.toString();
    }
}

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