Subj : Sealing Scopes
To   : netscape.public.mozilla.jseng
From : vige46
Date : Thu Oct 07 2004 07:57 am

Hi, 

I'd like to use one top ScriptableObject among several threads as
described in http://www.mozilla.org/rhino/scopes.html
I'd like to combine it with sealing the top scriptable object: 

<pre>
      Context tempContext=Context.enter();
      sharedScope=new ImporterTopLevel(tempContext,true);
      //BLOCK1: ....some operations:
      tempContext.evaluateString(sharedScope,"importPackage(Packages.java.util);",null,0,null);
      sharedScope.put("a",sharedScope,new Integer(10));
      //seal object then
      sharedScope.sealObject();
      Context.exit();
</pre>

In another thread, I'd like to use this sharedScope as a prototype for
another( local) scope:

<pre>
        Context context;
        context=Context.enter();
        
        Scriptable scope=new ImporterTopLevel(context,true);

        scope.setPrototype(sharedScope);
        scope.setParentScope(null);
</pre>

Everything works fine( I have access to propertie 'a' defined in
BLOCK1), untill I execute JavaScript command, which defines new
property

<pre>
        Object returnValue=context.evaluateString(scope, "var l = new
LinkedList();", null, 0, null);
</pre>

When calling this, I get org.mozilla.javascript.EvaluatorException:
Cannot remove a property from a sealed object: XML.

Thank you for any help.

I use Rhino 1_6R1pre.

.