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XtextEditor + editor input which is not a file [message #636669]

Tue, 02 November 2010 12:33

Patrick Di Loreto

Messages: 10
Registered: May 2010

Junior Member

How can I pass to the XtextEditor an input which is not a file?

Example:

I have an EMF model based on: MyModel.

MyModel contains metrics. Each metric has a formula:

MyModel
........|
........|---- Metrics
..................|------Metric
..............................|------Formula
........................................... |----Expression
..........................................................|. ....

My DSL in Xtext defines a grammar for the Expression object.

When with the Xtext editor I write an expression I want to take the EMF object and add this to my main EMF Object which is persisted using XMIResourceImpl.

How can I achieve that result ?

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Re: XtextEditor + editor input which is not a file [message #637422 is a reply to message #636669]

Fri, 05 November 2010 12:31

Jan Koehnlein

Messages: 760
Registered: July 2009
Location: Hamburg

Senior Member

Am 02.11.10 13:33, schrieb Patrick:
> How can I pass to the XtextEditor an input which is not a file?

You could write an IEditorInput yourself, e.g.
ResourceWorkingCopyFileEditorInput allows you to use the contents of an
exisiting Resource as input for an XtextEditor

>
> Example:
>
> I have an EMF model based on: MyModel.
>
> MyModel contains metrics. Each metric has a formula:
>
> MyModel
> .......|
> .......|---- Metrics
> .................|------Metric
> .............................|------Formula
> .......................................... |----Expression
> ..........................................................|. ....
>
> My DSL in Xtext defines a grammar for the Expression object.
>
> When with the Xtext editor I write an expression I want to take the EMF
> object and add this to my main EMF Object which is persisted using
> XMIResourceImpl.
>
> How can I achieve that result ?

As Xtext implements an EMF Resource it can be used transparently in
almost any EMF using application. Why do you need to keep XMI
serialization, which is horrible to read and maintain?

There are also various alternatives:
- use IXtextEditorCallback to be notified on save and take an action
- have a look at the OCL in Ecore example. It is somewhere in MDT/OCL
- register an IXtextModelListener to your editor and process model changes
- wait for Xbase and use it for your expressions
- ...

--
Need professional support for Eclipse Modeling?
Go visit: http://xtext.itemis.com

---
Get professional support from the Xtext committers at www.typefox.io

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Re: XtextEditor + editor input which is not a file [message #637439 is a reply to message #637422]

Fri, 05 November 2010 14:00

Patrick Di Loreto

Messages: 10
Registered: May 2010

Junior Member

Hi Jan,

thanks for your reply,
the reason I want to serialize in XMI is that my original model is XMI based, the xtext DSL just defines the Formula.

I want to have a Formula in XMI because it will represent a sort of AST, in the future I want to define more DSL which will map on the same ecore Formula object..

So a user can decide in which language writes the formula or reads it.

My next question is now how to put all the things together, I mean once I have created my specific editorInput which will implements the logic I need, how can I incorporate the XtextEditor inside a FormEditor and to be more specific in a IDetailsPage of a Master/Details FormPage ?

Any suggestion?

Thanks
Patrick

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Re: XtextEditor + editor input which is not a file [message #637683 is a reply to message #637439]

Mon, 08 November 2010 10:47

Jan Koehnlein

Messages: 760
Registered: July 2009
Location: Hamburg

Senior Member

Xtext currently does not support integrating the Xtext editor in a form
editor out of the box, but we're working on it.

You might want to have a look at the thread "Xtext editor integration
within UI Form editor". Note this is not an officially supported Xtext
solution.

Regards
Jan

Am 05.11.10 15:00, schrieb Patrick:
> Hi Jan,
>
> thanks for your reply,
> the reason I want to serialize in XMI is that my original model is XMI
> based, the xtext DSL just defines the Formula.
>
> I want to have a Formula in XMI because it will represent a sort of AST,
> in the future I want to define more DSL which will map on the same ecore
> Formula object..
>
> So a user can decide in which language writes the formula or reads it.
>
> My next question is now how to put all the things together, I mean once
> I have created my specific editorInput which will implements the logic I
> need, how can I incorporate the XtextEditor inside a FormEditor and to
> be more specific in a IDetailsPage of a Master/Details FormPage ?
>
> Any suggestion?
>
> Thanks
> Patrick
>
>
>

--
Need professional support for Eclipse Modeling?
Go visit: http://xtext.itemis.com

---
Get professional support from the Xtext committers at www.typefox.io

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Re: XtextEditor + editor input which is not a file [message #638638 is a reply to message #637683]

Thu, 11 November 2010 21:48

Philipp M. Fischer

Messages: 67
Registered: November 2010
Location: Germany

Member

Hi there,

I am currently facing exatly the same problems. Did you guys manage to get around these problems. Did you manage to use a customized EditorInput to directly hang in into the EMF model in the background?

Cheers

Phil

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