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Serializing model [message #1783840]

Mon, 19 March 2018 05:10

Eclipse User

Hi,

I'm trying to serialize a model into a DSL file according to my grammar but I get

Caused by: java.lang.ClassCastException: org.example.library.ecore.lib.util.LibResourceImpl cannot be cast to org.eclipse.xtext.resource.XtextResource

I created an xtext project based on an external ecore model and then followed this https://stackoverflow.com/questions/12302206/convert-object-to-xtext-dsl/12302496#12302496 to do the serialization.

If I instead start from a grammar and use the generated ecore file it works. The problem is that I already have the metamodel defined as a legacy XSD so I can't start from scratch.

Any idea how to solve this is very much appreciated.

/Patrik

Re: Serializing model [message #1783841 is a reply to message #1783840]

Mon, 19 March 2018 05:13

Eclipse User

can you give more context on
- how you call this code (eclipse/standalone)
- how you create the resource
- what your codes does

Re: Serializing model [message #1783843 is a reply to message #1783841]

Mon, 19 March 2018 05:28

Eclipse User

Christian Dietrich wrote on Mon, 19 March 2018 10:13

can you give more context on
- how you call this code (eclipse/standalone)

It is called in org.example.library.importer.handlers.SampleHandler in https://bitbucket.org/patnan/serializing-xtext/src. (Sorry for the ugly code ;-) )

Quote:

- how you create the resource

Using the org.example.library.ecore.editor generated from the ecore/genmodel

Quote:

- what your codes does

I want to 'reverse engineer' legaxy xml files conforming the an XSD into a proper xText DSL.

Re: Serializing model [message #1783991 is a reply to message #1783843]

Wed, 21 March 2018 05:35

Eclipse User

Any help on convert legacy (xml) files into DSL files is highly appreciated.

Re: Serializing model [message #1784007 is a reply to message #1783991]

Wed, 21 March 2018 09:45

Eclipse User

can you post a link directly to the handler. did no see it on first glance

Re: Serializing model [message #1784105 is a reply to message #1784007]

Thu, 22 March 2018 11:20

Eclipse User

Christian Dietrich wrote on Wed, 21 March 2018 14:45

can you post a link directly to the handler. did no see it on first glance

https://bitbucket.org/patnan/serializing-xtext/src/8c8dfaca7501ab772df21cbce7d472d7e78099c9/org.example.library.import/src/org/example/library/importer/handlers/SampleHandler.java?at=master&fileviewer=file-view-default

Re: Serializing model [message #1784124 is a reply to message #1784105]

Thu, 22 March 2018 12:35

Eclipse User

you should never ever do strange injector creation from eclipse / a handler
http://koehnlein.blogspot.de/2012/11/xtext-tip-how-do-i-get-guice-injector.html shows how you can obtain an injector from eclipse
what happens if you change that?

can you please post a complete stacktrace?

does it help if you ask the injector for a resourceset.
create a new resource with your dsls file extension
move the original resources contents to the new resource
then call the serializer

Re: Serializing model [message #1784252 is a reply to message #1784124]

Sat, 24 March 2018 15:37

Eclipse User

You could try to get an Injector instance as suggested by Christian or use the following code

final String serialized = ((XtextResource)model.eResource()).getSerializer().serialize(model)
OR
final String serialized = NodeModelUtils.getNode(model).getText()

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