Re: Don't understand NodeModel.get with XML

It's work !

If I do :

        String txt = "<root><a/><b/></root>";
        NodeModel mod = NodeModel.parse(
                new InputSource(new StringReader(txt)));
        System.out.println("hope it's doc ? = "+mod);
        TemplateSequenceModel seqroot = mod.getChildNodes();
        NodeModel root = (NodeModel)seqroot.get(0);
        TemplateSequenceModel childsroot = root.getChildNodes();
        NodeModel hopea = (NodeModel) childsroot.get(0);
        NodeModel hopeb = (NodeModel) childsroot.get(1);
        System.out.printf("hope it's root ? = %s - %s%n", root,
root.getNodeName());
        System.out.printf("hope it's a ? = %s - %s%n", hopea,
hopea.getNodeName());
        System.out.printf("hope it's b ? = %s - %s%n", hopeb,
hopeb.getNodeName());

I see on console :

hope it's doc ? = freemarker.ext.dom.DocumentModel@108786b
hope it's root ? = freemarker.ext.dom.ElementModel@1ad086a - root
hope it's a ? = freemarker.ext.dom.ElementModel@10385c1 - a
hope it's b ? = freemarker.ext.dom.ElementModel@42719c - b

It's OK and, more difficult, I understand.


Why this stupid code ? It's for debugging purpose.

I have a TemplateMethodModel which return a NodeModel from a XML String and,
sometimes the XML attributes disapear , I don't understand why.

<#macro elemName>
<#assign ln = .node.@att> <!-- sometimes no attributes here, but there are
in the XML String -->

// from the TemplateMethodModel :
    public Object exec(List list) throws TemplateModelException
    {
      NodeModel mod;

      mod = null;
      try
      {
        String texte;

        texte = (String)list.get(0);
        if (!texte.startsWith("<?xml"))
          texte =
                "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"+
                "<txtDescriptif>"+texte+"</txtDescriptif>";
        //
        mod = NodeModel.parse(new InputSource(new StringReader(texte)));
      }
      catch (Exception excp)
      {
        ...
      }
      return mod;
    }


I explore... I don't understand... if you have any suggestion...





2008/5/5 Stephan Müller <[email protected]>:

> Ista Pouss schrieb:
> > Hi,
> >
> > If I do that :
> >
> >        String txt = "<root><a/><b/></root>";
> >         NodeModel mod = NodeModel.parse(
> >                 new InputSource(new StringReader(txt)));
> >         System.out.println("hope it's root ? = "+mod);
> >         System.out.println("hope it's a ? = "+mod.get(0));
> >         System.out.print("hope it's b ? = "+mod.get(1));
> >
> >
> > I see on console :
> >
> > hope it's root ? = freemarker.ext.dom.DocumentModel@108786b
> > hope it's a ? = freemarker.ext.dom.DocumentModel@108786b
> > hope it's b ? = null
> >
>
> First of all, I don't see why you try to navigate through the wrapped
> DOM document like this, since the main (and only) intended use of the
> NodeModel API is from inside a FreeMarker template. Nevertheless it is
> possible to achieve this with the NodeModel API. One problem is that the
> result of NodeModel.parse() returns the document node, not the
> document's root node. Secondly, AFAIK, you cannot use the
> NodeModel.get(int) methods to access the child nodes. You have to use
> NodeModel.getChildNode().get(int) instead:
>
> String txt = "<root><a/><b/></root>";
> NodeModel documentNode = NodeModel.parse(
>     new InputSource(new StringReader(txt)));
>
> NodeModel rootNode = (NodeModel)documentNode.getChildNodes().get(0);
> System.out.println("hope it's root ? = "+rootNode.getNodeName());
>
> NodeModel nodeA = (NodeModel)rootNode.getChildNodes().get(0);
> System.out.println("hope it's a ? = "+nodeA.getNodeName());
>
> NodeModel nodeB = (NodeModel)rootNode.getChildNodes().get(1);
> System.out.print("hope it's b ? = "+nodeB.getNodeName());
>
> Alternatively you can use XPath expressions to navigate through the
> document:
>
> ArrayList xpath = new ArrayList();
> xpath.add("/root/a");
> NodeModel anotherNodeA = (NodeModel)documentNode.exec(xpath);
> System.out.println("hope it's a ? = "+anotherNodeA.getNodeName());
>
>
>
>
> HTH,
> Stephan.
>

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