Subj : Re: E4X on DOM nodes or fragments
To   : netscape.public.mozilla.jseng
From : torntrousers
Date : Mon Mar 21 2005 02:48 pm

"Satyanandam Gullapudi" <satyanandam_g@hotmail.com> wrote in message news:<hX5%d.11141$A42.9596@fe10.lga>...
> All the examples and documentation I see on E4X create a variable pointing 
> to a XML fragment with in the script or open a document from with in the 
> script. Is there any way to pass a Java DOM XML fragment  object or Java DOM 
> Node object or  Xcursor Java object from Java to Javascript runtime via the 
> scope bindings ?

Hi Satyanandam,

The code below shows how to pass a DOM or XmlObject to a function.
Note, if you want to _get_ a DOM node from a script you'll need to be
using XmlBeans V2.

public class Test2 {

   public static void main(String[] args) {

      Context cx = Context.enter();
      try {

         StringBuffer sb = new StringBuffer();
         sb.append("function foo(xml) {\n");
         sb.append("java.lang.System.out.println(typeof(xml));");
         sb.append("java.lang.System.out.println(xml);");
         sb.append("return xml;\n");
         sb.append("}\n");
         String script = sb.toString();

         Scriptable scope = cx.initStandardObjects(null, true);

         Script compiledScript = 
            cx.compileString(script,"bla",1,null);
         compiledScript.exec(cx, scope);
         Function foo = (Function) scope.get("foo", scope);

         String xml = "<a><b><c/></b></a>";
         //XmlObject request = Factory.parse(xml);
         DocumentBuilderFactory factory = DocumentBuilderFactory
            .newInstance();
         DocumentBuilder builder = factory.newDocumentBuilder();
         Document doc = builder
            .parse(new InputSource(new StringReader(xml)));
         XmlObject request = Factory.parse(doc);

         Object wRequest = cx.getWrapFactory().wrap(
            cx, scope, request, XmlObject.class);
         Object jsRequest = cx.newObject(
            scope, "XML", new Object[] { wRequest });
         Object[] functionArgs = new Object[] { jsRequest };

         Scriptable jsResult = (Scriptable) foo.call(cx, scope, scope,
                                                     functionArgs);

         System.out.println("jsResult:\n" + jsResult);

         Wrapper wrap = (Wrapper) ScriptableObject
                .callMethod(jsResult, "getXmlObject", new Object[0]);
         XmlObject result = (XmlObject) wrap.unwrap();
         System.out.println("result:\n" + result);

     } catch (Exception e) {
         throw new RuntimeException(e);
     } finally {
         Context.exit();
     }
   }
}

.