Tree and id for node

General
1

if I write the following


public static HierarchicalContainer getContainer() {
		Item root = null;
		Item son  = null;
		HierarchicalContainer hwContainer = new HierarchicalContainer();
		//root Property Name
                hwContainer.addContainerProperty(dp_PROPERTY_NAME, String.class, null);
		// root Icon 
		hwContainer.addContainerProperty(dp_PROPERTY_ICON, ThemeResource.class,
				new ThemeResource("icons/16/folder.png"));
		root = hwContainer.addItem(0);
		root.getItemProperty(dp_PROPERTY_NAME).setValue(dispositivo[0]
);
		hwContainer.setChildrenAllowed(0, false);
		for (int i = 1; i < source.length; i++) {
			//son property
                        son = hwContainer.addItem(i);
		       //son  icon
                       son.getItemProperty(dp_PROPERTY_NAME).setValue(source[i]
);
		       son.getItemProperty(dp_PROPERTY_ICON).setValue(
					new ThemeResource("icons/16/document.png"));
			//root and you son
                       hwContainer.setParent(i, 0);
			hwContainer.setChildrenAllowed(i, false);

		}

		return hwContainer;

	}

I have now
root
[0]
—> (Property.Name,icon)------->(“source 0”,folder.png)

[1]
------>(Property.Name,icon)------->(“source 1”,document.png)

[2]
------>(Property.Name,icon)------->(“source 2”,document.png)

I write the following


 myTree.setContainerDataSource(DataTree.getContainer());

I write the following

Item item = event.getItem();
Property name = item.getItemProperty(DataTree.dp_PROPERTY_NAME);
String valor = (String) name.getValue();

valor=“source 0”;
icon=??
id=???

I get the id???
I get the icon??
and as I get all id in tree ???