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Code Generator in java [message #1111656]

Wed, 18 September 2013 14:40

Sheetal Bhatewara

Messages: 14
Registered: August 2013

Junior Member

I have a grammar written in .xtext file.
Now, the default code generator is in .xtend.
But writing code generator in xtend is not easy for me, as syntax of xtend is new for me.
So, I want to change it to .java code generator.

So, if anyone has worked on it, then please let me know the steps to invoke the java code generator.

[ Right now, with .xtend, using my grammer , the files are getting generated at default location src-gen]

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Re: Code Generator in java [message #1111729 is a reply to message #1111656]

Wed, 18 September 2013 16:47

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

if you really want to give you the pain...

(1) delete the Generator.xtend
(2) change the workflow to

    		fragment = generator.GeneratorFragment auto-inject {
    			generateStub = false
    		}

(3) rerun the workflow
(4) create the missing Class in Java

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Code Generator in java [message #1112155 is a reply to message #1111729]

Thu, 19 September 2013 07:35

Sheetal Bhatewara

Messages: 14
Registered: August 2013

Junior Member

Thanks Christian for your quick response.

One query in the approach suggested by you.
Is it mandatory to implement IGenerator in the newly created class?( As the default .xtend had it)
Because, it seems, if we don't then generator invocation is not happening.

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Re: Code Generator in java [message #1112174 is a reply to message #1111729]

Thu, 19 September 2013 08:05

Sheetal Bhatewara

Messages: 14
Registered: August 2013

Junior Member

While changing workflow, is it 'generateStub = false' or 'generatorStub = false'?
generateStub = false is giving compilation error , and suggesting it to change to
'generatorStub = false'

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Re: Code Generator in java [message #1112177 is a reply to message #1112155]

Thu, 19 September 2013 08:09

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Yes it is

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Re: Code Generator in java [message #1112182 is a reply to message #1112174]

Thu, 19 September 2013 08:10

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Change it to what auto completion suggests. I tested with 2.4.3

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Need training, onsite consulting or any other kind of help for Xtext?
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Re: Code Generator in java [message #1112901 is a reply to message #1111656]

Fri, 20 September 2013 10:37

Karsten Thoms

Messages: 762
Registered: July 2009
Location: Dortmund, Germany

Senior Member

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Re: Code Generator in java [message #1112903 is a reply to message #1112901]

Fri, 20 September 2013 10:39

Karsten Thoms

Messages: 762
Registered: July 2009
Location: Dortmund, Germany

Senior Member

You should really take some hours (its not more than that) to learn Xtend. It is highly NOT RECOMMENDED to write code generators in Java. Xtend is well suited for this use case, and it is really close to the Java language.

Need professional support for Xtext, EMF, Eclipse IDE?
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Blog : www.karsten-thoms.de

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