ActionScript function to convert XML into Array

To allow the grouping and summary rows in DataGrid, I decided to convert existing report (old fashion DataGrid) to AdvancedDataGrid, which is a new feature of Flex 3. And which is turned out that raw XML I receive from backend returns an error. I needed more control of the data. As a part of the fix I wrote the conversion function which returns associated array collection based on input xml. Enjoy:

private function xml2array(xml:XMLDocument):ArrayCollection {
    var ac:ArrayCollection = new ArrayCollection();
    var xmlNodes:ArrayCollection = new ArrayCollection(xml.childNodes);
    for (var i:int = 0; i < xmlNodes.length; i++) {
        var thisRecord:Dictionary = new Dictionary();
        var rowObj:Object = xmlNodes[i].childNodes;
        for (var j:int = 0; j < rowObj.length; j++) {
            var thisNodeName:String = rowObj[j].localName;
            var thisNodeValue:String = '';
            if (rowObj[j].childNodes && rowObj[j].childNodes.length > 0) {
                if (rowObj[j].childNodes[0].nodeValue)
                    thisNodeValue = rowObj[j].childNodes[0].nodeValue;
                else 
                    thisNodeValue = '';
            }
            thisRecord[thisNodeName] = thisNodeValue;
        }
        ac.addItem(thisRecord);
    }
    return ac;
}