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Problems Using XText Language in Java project. [message #1736104]

Sun, 26 June 2016 06:35

Sam Patterson

Messages: 18
Registered: June 2016

Junior Member

Hello,

I followed Sebastian Zarnekow's guide on how to export an XText language and use it in a standalone project.

However I'm getting the following error when attempting to validate the language:

"The string resource '_UI_DiagnosticRoot_diagnostic' could not be located"

Could it be something to do with how the JAR is exported? When exporting I chose the "Export required libraries into generated JAR", however if I use 2nd option eclipse tells me it cannot find the main class for the project.

Anyone help is appreciated Smile

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Re: Problems Using XText Language in Java project. [message #1736280 is a reply to message #1736104]

Tue, 28 June 2016 08:17

Karsten Thoms

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

Senior Member

Did you use the Library handling option "Package required libraries into generated JAR"? It is not the default option.

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Re: Problems Using XText Language in Java project. [message #1736281 is a reply to message #1736104]

Tue, 28 June 2016 08:18

Lorenzo Bettini

Messages: 1815
Registered: July 2009
Location: Firenze, Italy

Senior Member

On 27/06/2016 13:57, Sam Patterson wrote:
> Hello,
>
> I followed Sebastian Zarnekow's guide on how to export an XText language
> and use it in a standalone project.
>
> However I'm getting the following error when attempting to validate the
> language:
>
> "The string resource '_UI_DiagnosticRoot_diagnostic' could not be located"
>
> Could it be something to do with how the JAR is exported? When exporting
> I chose the "Export required libraries into generated JAR", however if I
> use 2nd option eclipse tells me it cannot find the main class for the
> project.
>
> Anyone help is appreciated :)
>
>

Hi

If I remember correctly, you should export the jar with all dependencies
packed as jars into the exported jar, and NOT as extracted into the
packed jars. Otherwise the properties files and manifests will override
each others and EMF won't be able to find the properties containing the
substitutions for the strings.

hope this helps
Lorenzo

--
Prof. Lorenzo Bettini, Computer Science, DISIA, Univ. Firenze
HOME: http://www.lorenzobettini.it
Xtext Book:
http://www.packtpub.com/implementing-domain-specific-languages-with-xtext-and-xtend/book

HOME: http://www.lorenzobettini.it
TDD Book: https://leanpub.com/tdd-buildautomation-ci
Xtext Book: https://www.packtpub.com/application-development/implementing-domain-specific-languages-xtext-and-xtend-second-edition

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Re: Problems Using XText Language in Java project. [message #1736289 is a reply to message #1736281]

Tue, 28 June 2016 09:31

Karsten Thoms

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

Senior Member

Yes, the option I stated above is exactly for the case that the libraries are packaged in the jar and are not unpacked. I also think that it is the failure reason.

Need professional support for Xtext, EMF, Eclipse IDE?
Go to: http://devhub.karakun.com
Twitter : @kthoms
Blog : www.karsten-thoms.de

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Re: Problems Using XText Language in Java project. [message #1738010 is a reply to message #1736289]

Fri, 15 July 2016 03:53

Sam Patterson

Messages: 18
Registered: June 2016

Junior Member

I tried both extracting and packaging the JAR, however when I package the JAR none of the imports are recognized (mainly the XText and google ones), so I can't even run the program. However if I extract the JAR then the imports do work but of course I get the original error message.

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Re: Problems Using XText Language in Java project. [message #1738071 is a reply to message #1738010]

Fri, 15 July 2016 14:26

Christian Dietrich

Messages: 14738
Registered: July 2009

Senior Member

that about simply create a valid plugin.propertties manually with the required entries ?!?

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: Problems Using XText Language in Java project. [message #1738082 is a reply to message #1738071]

Fri, 15 July 2016 15:37

Sam Patterson

Messages: 18
Registered: June 2016

Junior Member

Well the problem still lies in the fact that packaging the JAR(as people stated I should be doing) causes the required imports to not be recognized, so I'm not able to get to a point where the program can be executed, therefore even if creating a plugin.properties file fixes the original '_UI_DiagnosticRoot_diagnostic error at run time, I still can't execute the application.

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Re: Problems Using XText Language in Java project. [message #1738085 is a reply to message #1738082]

Fri, 15 July 2016 15:43

Christian Dietrich

Messages: 14738
Registered: July 2009

Senior Member

Please describe step by step what to do to reproduce

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: Problems Using XText Language in Java project. [message #1738088 is a reply to message #1738085]

Fri, 15 July 2016 16:36

Christian Dietrich

Messages: 14738
Registered: July 2009

Senior Member

p.s. i did the following

(1) create a new xtext project.
(2) adapt workflow to generate java main for generator
(3) generate lang
(4) run generated java main once
(5) use the export as runnable jar file, tell it to create a ant file
(6) copy the ant file to the project
(7) adapted the ant file to include another file at the end

       		<fileset dir="${dir.workspace}/org.xtext.example.mydsl2/">
       			<include name="plugin.properties"/>
       		</fileset>

(

create org.xtext.example.mydsl2/plugin.properties as follows

_UI_DiagnosticRoot_diagnostic=Dont Care

well i was too lazy to look up the real values and the other key value pairs

(9) rerun ant file
(10) have fun

if id be an ant wizard i would somehow adapt the build.xml to create a plugin.properties that contains all plugin.properties of the unpacked files merged
unfortunately i am not an ant wizard

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: Problems Using XText Language in Java project. [message #1738117 is a reply to message #1738088]

Fri, 15 July 2016 19:58

Sam Patterson

Messages: 18
Registered: June 2016

Junior Member

I did all the steps you mentioned above, but again the Xtext, EMF and google imports cannot be resolved.

FYI The process I'm using for adding the JAR to the standalone project is by adding it as a Library via the Build Path.

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Re: Problems Using XText Language in Java project. [message #1738118 is a reply to message #1738117]

Fri, 15 July 2016 20:09

Sam Patterson

Messages: 18
Registered: June 2016

Junior Member

So I was able to resolve the imports but it required extracting the generated JAR file and adding all the JARs it contained to my projects build path, I'm not sure why eclipse is not reading them from the Xtext JAR.

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Re: Problems Using XText Language in Java project. [message #1738122 is a reply to message #1738118]

Fri, 15 July 2016 20:47

Christian Dietrich

Messages: 14738
Registered: July 2009

Senior Member

Cause jars in jars are not allowed in java

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: Problems Using XText Language in Java project. [message #1738130 is a reply to message #1738122]

Fri, 15 July 2016 22:54

Sam Patterson

Messages: 18
Registered: June 2016

Junior Member

Does that mean that I will always have to add every required JAR to the build path regardless of what export method I use for the JAR containing my DSL?

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Re: Problems Using XText Language in Java project. [message #1738133 is a reply to message #1738130]

Sat, 16 July 2016 02:08

Sam Patterson

Messages: 18
Registered: June 2016

Junior Member

What I ended up doing was using the extract option and simply adding the _UI_Diagnostic line to the plugin.properties file, slightly annoying that simply trying to use a DSL in a standalone project is this troublesome, thank you for the assistance nonetheless.

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