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How to validate file names in generated file FileTemplateProvider [message #1802332]

Wed, 06 February 2019 15:08

Martin Moser

Messages: 18
Registered: January 2019

Junior Member

Hi all,

I have created a File Wizard using xText 2.14.
In my mwe2 file I have set:
fileWizard = {
generate = true
}

Using that generated file template I can generate demo files using the generateFiles method.
Now I want to check whether the given file name in the wizard matches a regular expression.

I thought I could override the validate() method, buit seems, that this method isn't called at all.

My FileTemplateProvider looks like this:

@FileTemplate(label="My DSL file", icon="file_template.png", description="desc....")
....
final class MyDslFile {

//generation is called and it works
override generateFiles(IFileGenerator generator) {
generator.generate('''«folder»/«name».mydsl''', '''
//dummyfile
''')
}

override validate() { //never called??
println("validate");
return new Status(IStatus.ERROR, "", 1, "KO", null);
}

override updateVariables() { //also never called??
println("updateVariables");
}
}

So, what am I doing wrong?

Thanks in advance!

Best regards,
Martin

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Re: How to validate file names in generated file FileTemplateProvider [message #1802370 is a reply to message #1802332]

Thu, 07 February 2019 13:03

Arne Deutsch

Messages: 12
Registered: July 2009

Junior Member

Hi Martin,

folder and file name are somewhat special in that they are not variables and hence the validation method are not called for them (only for other variables). There was a discussion in the comments about the (related) new project wizard regarding name and folder. Please have a look in the comments at https://blogs.itemis.com/en/new-file-wizard-easy-to-generate-with-xtext-2.14 . I think if you need to adapt the validaiton logic for these fields you probably have to implement your own NewFileWizardPrimaryPage (https://github.com/eclipse/xtext-eclipse/blob/24ff1fcfb7821f496346864ca6e32a99f931273b/org.eclipse.xtext.ui/src/org/eclipse/xtext/ui/wizard/template/NewFileWizardPrimaryPage.java).

Hope this will pelp you.

Kind regards,
Arne

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