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How to modify a model which is not opened in an editor ? [message #1732811]

Fri, 20 May 2016 07:43

Eclipse User

Dear all,

I have an XtextResource, and I would like to modify the model it contains. As this resource is not opened in an editor, XtextDocumentUtil.get(iFile) (with iFile = ResourceUtil.getFile(new URIEditorInput(resourceUri));) returns null. Thus, I don't know how to get an IXtextDocument associated to my resource, on which I could call org.eclipse.xtext.util.concurrent.IWriteAccess.modify(IUnitOfWork<T, P>).

What is the right way to modify a model which is not opened in an editor ?

Thanks in advance !
Flo

Re: How to modify a model which is not opened in an editor ? [message #1732819 is a reply to message #1732811]

Fri, 20 May 2016 08:46

Eclipse User

is this in the context of a quickfix or independent from?

Re: How to modify a model which is not opened in an editor ? [message #1732937 is a reply to message #1732819]

Mon, 23 May 2016 04:37

Eclipse User

We have the problem in several contexts, including quickfixes but also commands that we apply to a whole project (for instance "organize imports in every files of the project").

Re: How to modify a model which is not opened in an editor ? [message #1732939 is a reply to message #1732937]

Mon, 23 May 2016 04:49

Eclipse User

for commands you can simply load everything into a resourceset created with IResourceSetProvider.

for the quickfix your could try to open another editor using IURIEditorOpener

Re: How to modify a model which is not opened in an editor ? [message #1732943 is a reply to message #1732939]

Mon, 23 May 2016 05:28

Eclipse User

Thanks for your quick answer and the idea of using IURIEditorOpener for the quickfixes.

Concerning the commands, I succeed in getting the resources that I want to modify, and to apply IUnitOfWork.exec(XtextResource) to modify them. My problem is how to reserialize them: if I call org.eclipse.emf.ecore.resource.Resource.save(Map<?, ?>), the whole model is reserialized, whereas (to ensure the formatting stability of non-impacted parts of the model), I would like to reserialize only modified parts of the model, as it is done by org.eclipse.xtext.util.concurrent.IWriteAccess.modify(IUnitOfWork<Boolean, XtextResource>)

Re: How to modify a model which is not opened in an editor ? [message #1732945 is a reply to message #1732943]

Mon, 23 May 2016 05:35

Eclipse User

sry no idea on this

Re: How to modify a model which is not opened in an editor ? [message #1732950 is a reply to message #1732945]

Mon, 23 May 2016 06:09

Eclipse User

Have a look at ReconcilingUnitOfWork. It contains the code to re-serialize the changed parts only.

Re: How to modify a model which is not opened in an editor ? [message #1732952 is a reply to message #1732950]

Mon, 23 May 2016 07:00

Eclipse User

Sadly, ReconcilingUnitOfWork heavily relies on the underlying IXtextDocument (in particular it applies the computed text edits using a RewriteSessionEditProcessor which takes the document in parameter), and I don't know how to get an IXtextDocument associated to my resource without opening it in an editor (which is not possible for my commands modifying many files).

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