Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

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

public class Main {
    /**
     * @param child
     * @return the single child element or null
     * @throws Exception if the child is present multiple times
     */
    public static Element getChild(Element element, String child) throws Exception {
        NodeList nodes = element.getChildNodes();
        Element ret = null;
        for (int i = 0; i < nodes.getLength(); i++) {
            Node childNode = nodes.item(i);
            if (childNode.getNodeName().equalsIgnoreCase(child) && childNode.getNodeType() == Node.ELEMENT_NODE) {
                if (ret != null) {
                    throw new Exception("Child element '" + child + "' present multiple times");
                } else {
                    ret = (Element) childNode;
                }
            }
        }
        if (ret == null) {
            return null;
        } else {
            return ret;
        }
    }
}