XML View & Model, Tree & binding

Question

Hi there,
i'm trying to do some stuff with XML models, XML Views and Trees.
Here is my xml model file :
<objectSet version="1.2.3.4">
    <aRoot code="testCode" reference="0123456789" description="TestDescription" owner="Tester">
            <component name="MyCompo1" type="MyCompo1Type">
              <component name="MyCompo2" type="MyCompo2Type">
               <property name="myProperty2-1" type="string" value="null"/>
              </component>
              <component name="MyCompo3" type="MyCompo3Type">
               <property name="myProperty3-1" type="string" value="null"/>
              </component>
            </component>
    </aRoot>
</objectSet>
My XML View file :
<core:View xmlns:core="sap.ui.core" xmlns:mvc="sap.ui.core.mvc" xmlns="sap.m" xmlns:cmn="sap.ui.commons"
        controllerName="cleanproject.TreeTest" xmlns:html="http://www.w3.org/1999/xhtml">
                <cmn:Tree nodes="{/aRoot}">
                <cmn:TreeNode text="{@name} TagNameHere?"></cmn:TreeNode>
                </cmn:Tree>
</core:View>
My Js Controller file :
sap.ui.controller("cleanproject.TreeTest", {
onInit: function() {
var xmlModel =  new sap.ui.model.xml.XMLModel("cleanproject/"+xmlPath3);
xmlModel.setXML("the full xml document here"); // bad trick
this.getView'().setModel(xmlModel);
I have multiples questions :
What is the way to wait the xml file to be loaded, because when i'm not using setXML function in my controller, the view is instantiated too fast  and an error is raised as the model is not accessible ( Error message : "N is null" )
Is it possible to display in a TreeNode the tagName of an element? ( e.g : "component", "property" )
Is it possible to build the tree only with "component" TreeNodes ?
4. Is it possible to bind a part of the datas , eg : bind with a deepth of 1,2,...n ?
Thanks for helping,
Regards,
Marc
Edit :
1. In the onInit function, use attachRequestCompleted method. In my case :
var thus= this;
        xmlModel.attachRequestCompleted(function(event){
            thus.getView().setModel(xmlModel);
2.
tree.bindNodes("/",function(sId, oContext){
                var tagName = oContext.getObject().tagName;
                var name = oContext.getObject().getAttribute("name");
                var sText = tagName;
                if(name){
                    sText+=" "+name;
                return new cleanproject.custom.ComplexTreeNode({text:sText});
            },null,[oFilter]);
3. It does not seem possible even with filters
4. Can be done using javascript and a custom method

Answer 1

Hi all,
I just tested again and now it's working...
<Label xmlns="sap.m" design="Standard" text="{/MAIN_OBJECTSet('1')/PROPERTY_NAME}"
  visible="true" textAlign="Begin" textDirection="Inherit" width="200px"
  required="false" labelFor="">
  </Label>
The relative path syntax depends on the used model!
Strange - but ok.
Thanks.
Best regards,
Christoph