Re: Using XML as a data-model

Friday, February 20, 2009, 11:50:42 PM, Kirill wrote:
> Hello,
> I am using an XML as a data-model, similar to this:
>
> Map root = new HashMap();
> root.put("doc", freemarker.ext.dom.NodeModel.parse(new
> File("the/path/of/the.xml")));
>
> Then, I can recurse through the document with <#recurse doc>, where
> 'doc' is a key name from the Map.
>
> The question is - how can I refer to that 'doc' variable? For example,
> if I don't know its' value and want to recurse through the XML
> data-model.
>
> So, if I do something like:
>
> root.put(stringKeyName, freemarker.ext.dom.NodeModel.parse(new
> File("the/path/of/the.xml")));
>
> I need to be able to recurse in this manner:
>
> <#recurse stringKeyName>

I'm not sure I understand it... You put something into the data-mode
with a name that you don't know at the time of template authoring, and
then still want to access that variable? Of course that's only
possible if you add the *name* of the variable to data-model as well:

  root.put("keyName", stringKeyName);

and the in the template:

  <#recurse .vars[keyName] />

but then it's simpler if you just chose a fixed alias name:

  TemplateModel val = freemarker.ext.dom.NodeModel.parse(new
      File("the/path/of/the.xml"))
  root.put(stringKeyName, val);
  root.put("theDoc", val);

and

  <#recurse theDoc />

Last not least, the template can discover the data-model content
itself, for example:

  <#list .data_model?keys as k>
    <#if .data_model[k]?is_node>
      <#recurse .data_model[k]>
    </#if>
  </#list>

-- 
Best regards,
 Daniel Dekany


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