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Adding new fields in code generator [message #964558]

Tue, 30 October 2012 16:12

Dana Klein

Messages: 63
Registered: October 2012

Member

Hi,

I'm using http://christiandietrich.wordpress.com/2011/07/22/customizing-xtext-metamodel-inference-using-xtend2/ way of code generating.
and i want to use it to add field in my xtext project on some of the generated classes
out of it scope

how can it be done?

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Re: Adding new fields in code generator [message #964814 is a reply to message #964558]

Tue, 30 October 2012 20:24

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

Fields are EAttributes (or EReferences)

~Christian

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

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Re: Adding new fields in code generator [message #965639 is a reply to message #964814]

Wed, 31 October 2012 11:52

Dana Klein

Messages: 63
Registered: October 2012

Member

great. Thank you very much!
can you please give me an example to do so.

attached is my current xtend file
which generate the following code in "ObjectValue" object:
/**
* 
* 
* @generated
*/
public String getFullName()
{
return null;
}

I want to add a new attribute to the class.

Attachment: CodeGeneratorClass.xtend
(Size: 1.23KB, Downloaded 215 times)

[Updated on: Wed, 31 October 2012 11:52]

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Re: Adding new fields in code generator [message #965645 is a reply to message #965639]

Wed, 31 October 2012 11:57

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

def handle (EClass c) {
val attr = EcoreFactory::eINSTANCE.createEAttribute
attr.name = "test"
attr.EType = EcorePackage::eINSTANCE.EString
c.EStructuralFeatures += attr
}

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

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Re: Adding new fields in code generator [message #965672 is a reply to message #965645]

Wed, 31 October 2012 12:19

Dana Klein

Messages: 63
Registered: October 2012

Member

amazing! thank you!
how can i change the type to internal object, which not in the EcorePackage instances?

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Re: Adding new fields in code generator [message #965703 is a reply to message #965672]

Wed, 31 October 2012 12:50

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

i am not sure what you are talking about

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

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Re: Adding new fields in code generator [message #965721 is a reply to message #965703]

Wed, 31 October 2012 13:04

Dana Klein

Messages: 63
Registered: October 2012

Member

attr.EType = EcorePackage::eINSTANCE.EString

can it be changed from 'String' to 'MyObject'?

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Re: Adding new fields in code generator [message #965732 is a reply to message #965721]

Wed, 31 October 2012 13:10

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Good question I think you need to add an additional edatatype to the
epackage for that

--
Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

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

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Re: Adding new fields in code generator [message #965735 is a reply to message #965732]

Wed, 31 October 2012 13:17

Dana Klein

Messages: 63
Registered: October 2012

Member

Sorry for bothering you but how do I do that?

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Re: Adding new fields in code generator [message #965808 is a reply to message #965721]

Wed, 31 October 2012 14:13

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

As is said. You have to create a own edatatype. You will find
background information on that when you search the web. Please note:
this is 0% Xtext specific.

--
Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

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

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Re: Adding new fields in code generator [message #965820 is a reply to message #965808]

Wed, 31 October 2012 14:29

Dana Klein

Messages: 63
Registered: October 2012

Member

ok, great! Thank you very much!
It was really helpful!

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Re: Adding new fields in code generator [message #971015 is a reply to message #965820]

Sun, 04 November 2012 14:08

Dana Klein

Messages: 63
Registered: October 2012

Member

Is it relevant also if I want to use Iterator<T> as the return type?

thank you very much Smile

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Re: Adding new fields in code generator [message #971140 is a reply to message #971015]

Sun, 04 November 2012 16:25

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

I am not quite sure if you are on the right track. Why do you want to
do such things? Why do you need to customize your metamodel that
much? Sounds like it is time to switch to a manually maintained one.

PS guess it gets a list automatically if you set the upper bounds
property.

--
Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

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

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Re: Adding new fields in code generator [message #972474 is a reply to message #971140]

Mon, 05 November 2012 17:02

Dana Klein

Messages: 63
Registered: October 2012

Member

I want to implement an iterator method on one of my models.

such that in my model will be:
public java.util.Iterator<TerminalObject> elements () {...}

Thanks

the questions were for different models...

anyways, thank you Smile

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