RE: [ve-dev] Questions about decoder

["Janak Mulani" <janak.mulani@xxxxxxxxx>]

Hi Gili,

Thanks for your reply.

Few followup questions:

>>> Gili >>>
What is the significance of restore() method of IExpressionDecoderHelper?
What should this method do?
> See AbstractExpressionDecoder.decode(),  If there is no cache, a regular
decode will be driven.
> This implies that the decoder will create/update EMF model elements, as
well as all the BDM meta information.
> If a cache exists, this implies that the EMF model is already online;
decoders will not change it.
> In this case a restore() is called.  A decoder is responsible to *restore*
its meta information
> to the existing model (e.g., use the IJavaObject already in the model,
attache adapters etc.)

>>>>>>>>>>>>

So the restore() is not supposed to touch the EMF model.

Then for a parent child relation, e.g. panel.add(getULCButton()), should the
restore() method do the following:

		// get the child bean part from the arguments in the above expression
		fChildBeanPart =
decodeArguments((MethodInvocation)getExpression(decodingContent), false);

		if (fChildBeanPart == null) {
			throw new CodeGenException("No Child Bean Part");
		}

		fChildBeanPart.addBackRef(fbeanPart,
(EReference)fFmapper.getFeature(null));
		fbeanPart.addChild(fChildBeanPart);
		if(!getExpressionReferences().contains(fChildBeanPart.getEObject()))
	    	  getExpressionReferences().add(fChildBeanPart.getEObject());

		return true;

This is what you do in the AbstractContainerAddDecoderHelper.restore()?

Thanks and regards,

Janak