Time for action—Reading from the XML file

We are going to create a function to read from an XML file. So, let's proceed step by step.

  1. First, create the Layer class as follows:
    class Layer
{
public var id : String;
public function new()
{}
}
  2. Now create the Page class as follows:
    class Page
{
public var name : String;
public var layers : List<Layer>;
public function new()
{
}
}
  3. Now, let's create a function to create a page from an XML file. Add the following function to the Page class:
    public static function fromXMLFile(path : String) : Page
{
var nPage = new Page();
var xmlDoc = Xml.parse(neko.io.File.read(path, false). readAll().toString());
nPage.name = xmlDoc.firstElement().get("name");
return nPage;
}
  4. As you can see, it is not yet complete. We have to parse a layer from the XML file, so let's do it now. Add the following function in the Layer class:
    public static function fromXMLNode(node : Xml)
{
var nLayer : Layer;
nLayer = new Layer();
nLayer.id = node.get("id");
return nLayer;
}
  5. Now, in the fromXMLFile function, let's add some code to iterate over the nodes named layers, and parse them using the fromXMLNode function:
    public static function fromXMLFile(path : String) : Page
{
var nPage = new Page();
var xmlDoc = Xml.parse(neko.io.File.read (path, false).readAll().toString());
nPage.name = xmlDoc.firstElement().get("name");
for(l in xmlDoc.firstElement().elementsNamed("layer"))
{
nPage.layers.add(Layer.fromXMLNode(l));
}
return nPage;
}

What just happened?

As you see, we are simply expecting our document to respect the structure that we have defined; therefore, it was pretty easy to parse our XML file.

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