XML-DOM Example

The following code shows in a short example how to create and parse a XML using the DOM classes.

Sample-XML

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<catalog>
    <book id="bk101">
        <author>Gambardella, Matthew</author>
        <title>XML Developer's Guide</title>
        <price>44.95</price>
    </book>
    <book id="bk102">
        <author>Ralls, Kim</author>
        <title>Midnight Rain</title>
        <price>5.95</price>
    </book>
</catalog>

Creating the sample XML and parsing of it

var xml = createXML();
parseXML(xml);


function createXML()
{
    var xml = "";
    try
    {
        var domDoc = new DOMDocument("catalog");
        var rootElem = domDoc.firstChild;

        // Book 1
        var book = domDoc.createElement("book");
        rootElem.appendChild(book);
        book.setAttribute("id", "bk101");

        var author = domDoc.createElement("author");
        book.appendChild(author);
        author.appendChild(domDoc.createTextNode("Gambardella, Matthew"));

        var title = domDoc.createElement("title");
        book.appendChild(title);
        title.appendChild(domDoc.createTextNode("XML Developer's Guide"));

        var price = domDoc.createElement("price");
        book.appendChild(price);
        price.appendChild(domDoc.createTextNode("44.95"));

        // Book 2
        book = domDoc.createElement("book");
        rootElem.appendChild(book);
        book.setAttribute("id", "bk102");

        author = domDoc.createElement("author");
        book.appendChild(author);
        author.appendChild(domDoc.createTextNode("Ralls, Kim"));

        title = domDoc.createElement("title");
        book.appendChild(title);
        title.appendChild(domDoc.createTextNode("Midnight Rain"));

        price = domDoc.createElement("price");
        book.appendChild(price);
        price.appendChild(domDoc.createTextNode("5.95"));

        // create xml
        var parser = new DOMParser();
        xml = parser.write(domDoc, "", "UTF-8")
    }
    catch (exp)
    {
        throw exp.message;
    }
    return xml;
}


function parseXML(xml)
{
    try
    {
        var domParser = new DOMParser();
        domParser.parse(xml, false);

        var root = domParser.getDocument();

        var catalog = root.documentElement;
        util.out(catalog.tagName);  // -> "catalog"

        var catChildCount = catalog.childNodes.length;  // -> 2 up to 5
        for (var i = 0; i < catChildCount; i++)
        {
            var book = catalog.childNodes[i];
            // Examine only DOMElements on this level! Text nodes with whitespaces and
            // comment nodes may occur before, between and after the book nodes.
            if (book.nodeType == DOMNode.ELEMENT_NODE)
            {
            util.out(book.getAttribute("id"));   // -> "bk101" / "bk102"

            var childs = book.childNodes;
            for (var j = 0; j < childs.length; j++)
            {
                    // Again: skip whitespaces etc.
                    if(childs[j].nodeType == DOMNode.ELEMENT_NODE)
                    {
                util.out(childs[j].tagName);          // -> "author" / "title" ....
                util.out(childs[j].firstChild.data);  // -> "Gambardella, Matthew" / "XML Developer's Guide" ....
            }
        }
    }
        }
    }
    catch (exp)
    {
        throw exp.message;
    }
}