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Persistence problem with optional assignment rules [message #698310]

Tue, 19 July 2011 08:53

Balazs Varnai

Messages: 21
Registered: June 2011

Junior Member

Hi,

I populate a xtext model using the generated EMF factory, the resource implementation retrieved correctly via the extension registry.

Given an optional assignment rule 'members', these are not persisted. Is there a way to force optional items?

Structure:
	'struct' name=ID '{'
	members+=Member*
	'}';

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Re: Persistence problem with optional assignment rules [message #698314 is a reply to message #698310]

Tue, 19 July 2011 08:57

Christian Dietrich

Messages: 13615
Registered: July 2009

Senior Member

Hi, if the members are not optional why don't use

Structure:
	'struct' name=ID '{'
	members+=Member+
	'}';

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Re: Persistence problem with optional assignment rules [message #698315 is a reply to message #698310]

Tue, 19 July 2011 08:58

Alexander Nittka

Messages: 1193
Registered: July 2009

Senior Member

Hi,

have you checked that the members are really contained in the structure? Which version of Xtext do you use? What does the code for the model population and serialisation look like?

Alex

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Re: Persistence problem with optional assignment rules [message #698323 is a reply to message #698315]

Tue, 19 July 2011 09:11

Balazs Varnai

Messages: 21
Registered: June 2011

Junior Member

I use Xtext 2.0 and the structure members are populated. I could make it mandatory, but it feels bad. Optional means if it's there, it's there and serialized accordingly.

Member member = Factory.eINSTANCE.createMember();
structure.getMembers().add(member);

It's a containment feature and structure is added to the resource.

getResourceSet().getResources().get(0).save(null);

Resource is org.eclipse.xtext.resource.XtextResource as expected.

Thanks!

[Updated on: Tue, 19 July 2011 09:16]

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Re: Persistence problem with optional assignment rules [message #698327 is a reply to message #698323]

Tue, 19 July 2011 09:21

Alexander Nittka

Messages: 1193
Registered: July 2009

Senior Member

Hi,

do you use the experimental serialiser feature (not fully implemented yet) or the "old" ParseTreeConstructorFragment?

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Re: Persistence problem with optional assignment rules [message #698331 is a reply to message #698327]

Tue, 19 July 2011 09:28

Balazs Varnai

Messages: 21
Registered: June 2011

Junior Member

Hi,

I guess the new one Rolling Eyes

// Serializer 2.0
fragment = serializer.SerializerFragment {}

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