Java XML Attribute from Node generateIds(Node root, String attrName)

Description

adds an attribute with random value to all elements, that do not have an attribute with the specified name.

License

Common Public License

Parameter

Parameter	Description
root	the root element
attrName	the name of the attribute, e.g. "id"

Declaration

public static void generateIds(Node root, String attrName) 

Method Source Code

//package com.java2s;
/*//from w ww  .  j av  a 2  s. co m
 * ====================================================================
 * This software is subject to the terms of the Common Public License
 * Agreement, available at the following URL:
 *   http://www.opensource.org/licenses/cpl.html .
 * Copyright (C) 2003-2004 TONBELLER AG.
 * All Rights Reserved.
 * You must accept the terms of that agreement to use this software.
 * ====================================================================
 *
 * 
 */

import java.util.Random;

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

public class Main {
    static final Random random = new Random();

    /**
     * adds an attribute with random value to all elements, that do not
     * have an attribute with the specified name.
     * @param root the root element
     * @param attrName the name of the attribute, e.g. "id"
     */
    public static void generateIds(Node root, String attrName) {
        if (root.getNodeType() == Node.ELEMENT_NODE) {
            Element e = (Element) root;
            String id = e.getAttribute(attrName);
            if (id == null || id.length() == 0)
                e.setAttribute(attrName, randomId());
        }
        NodeList list = root.getChildNodes();
        int N = list.getLength();
        for (int i = 0; i < N; i++)
            generateIds(list.item(i), attrName);
    }

    public static void generateIds(Node root) {
        generateIds(root, "id");
    }

    public static synchronized String randomId() {
        return "wcf" + Integer.toHexString(random.nextInt());
    }
}

Related

1. getALLAttribute(final Node iNode)
2. getFloatAttribute(Node node, String name, float defVal)
3. getFloatAttribute(Node node, String name, float defVal)
4. getIntAttr(Node node, String attrName)