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 {
    /**
     * Determine whether a single child is available of a particular type.
     * @return true if the specified child element is present
     * @throws Exception if the child is present multiple times.
     */
    public static boolean hasChild(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().equals(child) && childNode.getNodeType() == Node.ELEMENT_NODE) {
                if (ret != null) {
                    throw new Exception("Child element '" + child + "' present multiple times");
                } else {
                    ret = (Element) childNode;
                }
            }
        }
        return ret != null;
    }
}