Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

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

public class Main {
    /**
     * Creates (only if necessary) and returns the element which is at the end of the specified
     * path.
     * 
     * @param doc
     *            the target document where the specified path should be created
     * @param path
     *            a dot separated string indicating the path to be created
     * @return the component at the end of the newly created path.
     */
    public static Element createLastPathComponent(Document doc, String[] path) {
        Element parent = (Element) doc.getFirstChild();
        if (path == null || parent == null || doc == null) {
            throw new IllegalArgumentException("Document parent and path must not be null");
        }

        Element e = parent;
        for (int i = 0; i < path.length; i++) {
            Element newEl = getChildElementByTagName(e, path[i]);
            if (newEl == null) {
                newEl = doc.createElement(path[i]);
                e.appendChild(newEl);
            }
            e = newEl;
        }
        return e;
    }

    /**
     * Returns the child element with the specified tagName for the specified parent element
     * 
     * @param parent
     * @param tagName
     * @return
     */
    public static Element getChildElementByTagName(Element parent, String tagName) {
        if (parent == null || tagName == null) {
            return null;
        }

        NodeList nodes = parent.getChildNodes();
        Node node;
        int len = nodes.getLength();
        for (int i = 0; i < len; i++) {
            node = nodes.item(i);
            if (node.getNodeType() == Node.ELEMENT_NODE && ((Element) node).getNodeName().equals(tagName)) {
                return (Element) node;
            }
        }

        return null;
    }
}