Temporary ObjectTemplate

[Riccardo Corsi]

Hi all,

I'm using ObjectTemplate to create JS empty objects that are simple wrappers of a c++ object

(in the JS code they are just used as "handles" to pass the objects around in the script).

I was just wondering if there is any issue or penalty to use a new ObjectTemplate every time (see code below)

or if I should store the ObjectTemplate in a persistent handle and reuse it.

Thank you,

Ricky

v8::Handle<v8::Object> WrapNativeElem(NativeElem* elem)
   {
      Isolate* isolate = Isolate::GetCurrent();
      EscapableHandleScope handle_scope(isolate);

      // create an empty object
      v8::Handle<v8::ObjectTemplate> elem_templ = v8::ObjectTemplate::New();
      elem_templ->SetInternalFieldCount(1);
      v8::Local<v8::Object> wrapper = elem_templ->NewInstance();
     
      // set the game state as internal field and return the wrapper
      wrapper->SetInternalField(0, External::New(Isolate::GetCurrent(), elem));
      return handle_scope.Escape(wrapper);
   }

[Jochen Eisinger]

If possible, reusing the object template will save space, and is preferable

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[Riccardo Corsi]

will do, thanks!

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[Zac Hansen]

why wouldn't you just use a v8::External?  Isn't that exactly what they're meant for?

will do, thanks!

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[Jochen Eisinger]

depends on what you mean by wrapper. Typically, we'd call a JS object that corresponds to an embedder object a "wrapper"

[Riccardo Corsi]

v8::External is exactly what I'm using - see the code snippet in the original post. 

The question was just referring to the ObjectTemplate used to generate the object instances, on which I set the externals.

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