Eclipse Community Forums: Epsilon » Using Epsilon in Java

Search

Help

Login

Home » Modeling » Epsilon » Using Epsilon in Java

Show: Today's Messages :: Show Polls :: Message Navigator

Switch to threaded view of this topic

Create a new topic

Submit Reply

Using Epsilon in Java [message #1460628]

Mon, 03 November 2014 19:29

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi my friend,
I need to call Epsilon in java program. In fact My epsilon codes must be called in during a Java application. How I must start doing this?
I've started with 'org.eclipse.epsilon.example.estandalon' and tried to run it. So I check out this example in my work space. But when I run its Java code, for example 'EtlStandalonExample.java', I get bottom error:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
The import org.eclipse.epsilon.eol.dom cannot be resolved.....

I've checked dependency and this seems correct. In according to
http://www.eclipse.org/epsilon/examples/index.php?example=org.eclipse.epsilon.examples.standalone, I have not any lunch file in 'org.eclipse.epsilon.example.estandalon'. What is the reason of error that I get?

[Updated on: Tue, 04 November 2014 16:35]

Report message to a moderator

Re: Using Epsilon in Java [message #1460674 is a reply to message #1460628]

Mon, 03 November 2014 20:38

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

Sorry about that. Updating your copy of org.eclipse.epsilon.examples.standalone from the SVN should fix these errors.

Cheers,
Dimitris

Report message to a moderator

Re: Using Epsilon in Java [message #1460748 is a reply to message #1460674]

Mon, 03 November 2014 22:32

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Dear Dimitris,
It's OK. Thanks for your quick reply. I updated 'org.eclipse.epsilon.examples.standalone' and all its dependent plug-ins in my work space. But I get several other errors likes:

Exception in thread "main" java.lang.NullPointerException
at CallEpsiloninJava.EpsilonStandaloneExample.getFile(EpsilonStandloneExample.java:110)....

I have not any .lunch yet!
Should I do like standalone example For calling epsilon in Java? I'm beginner in doing this, what is your offer for learning and trying this?

Regards...

Report message to a moderator

Re: Using Epsilon in Java [message #1460761 is a reply to message #1460748]

Mon, 03 November 2014 22:51

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

Yes - studying how .standalone does things is the recommended way of getting familiar with Epsilon's Java API (I've tried running all runnable classes in .standalone (e.g. EolStandaloneExample, EtlStandaloneExample) and everything seems to be working fine on my side).

Cheers,
Dimitris

Report message to a moderator

Re: Using Epsilon in Java [message #1461510 is a reply to message #1460761]

Tue, 04 November 2014 16:35

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Dear Dimitris,
I Add .standalon and bottom plug-ins in my work space again.
org.eclipse.epsilon.eol.engine,
org.eclipse.epsilon.emc.emf,
org.eclipse.epsilon.ecl.engine,
org.eclipse.epsilon.egl.engine,
org.eclipse.epsilon.eml.engine,
org.eclipse.epsilon.erl.engine,
org.eclipse.epsilon.etl.engine,
org.eclipse.epsilon.evl.engine,
org.eclipse.epsilon.ewl.engine,
org.eclipse.uml2.uml
But I have several errors in above plug-in. For example, there is an error in definition of constructor EpsilonTreeAdaptor(URI, AbstractModule) in .eol.engin!
I'm trying to solve these errors. What is your suggestion about reason of these errors?

Report message to a moderator

Re: Using Epsilon in Java [message #1461570 is a reply to message #1461510]

Tue, 04 November 2014 18:02

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

We're in the middle of refactoring some of the internals of Epsilon, which could explain the errors you're receiving. If you're using the 1.2 release, please check out the .standlone example from http://dev.eclipse.org/svnroot/modeling/org.eclipse.epsilon/tags/1.2

Cheers,
Dimitris

Report message to a moderator

Re: Using Epsilon in Java [message #1463532 is a reply to message #1461570]

Thu, 06 November 2014 17:03

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi Dimitris,
I tried several versions of .standalone and its dependent plug-ins, but I gave similar errors in plug-ins which are added as dependency. I tried to solve them, but any alteration in one of them causes a new error in other plug-ins and this process need to a lot of time.
I use Kepler Service Release 2 and JRE-SE1.7.
Is it possible that I know what is version of your eclipse and jre and where do you check out .standalone and epsilon plug-ins?
I'll embrace from any suggestion.
Thanks for all your support Smile

Smile

[Updated on: Thu, 06 November 2014 17:36]

Report message to a moderator

Re: Using Epsilon in Java [message #1463717 is a reply to message #1463532]

Thu, 06 November 2014 21:25

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

Which version of Epsilon are you using?

Cheers,
Dimitris

Report message to a moderator

Re: Using Epsilon in Java [message #1463733 is a reply to message #1463717]

Thu, 06 November 2014 21:54

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi,
Excuse me, I forget to specify it. I'm using epsilon1.1-SR1.

Report message to a moderator

Re: Using Epsilon in Java [message #1463755 is a reply to message #1463733]

Thu, 06 November 2014 22:23

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

In this case, I'd suggest trying to check-out the .standalone example under http://dev.eclipse.org/svnroot/modeling/org.eclipse.epsilon/tags/1.1_SR1

Cheers,
Dimitris

Report message to a moderator

Re: Using Epsilon in Java [message #1464687 is a reply to message #1463755]

Fri, 07 November 2014 20:02

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Dear Dimitris,
Thanks for all your support. I checked out this version and with little change, I could run it.

Report message to a moderator

Re: Using Epsilon in Java [message #1468316 is a reply to message #1464687]

Mon, 10 November 2014 19:04

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi dear Dimitris,
I'm working on using the epsilon in Java application after the successful running of standalone example.
I implemented a Java application and in during the Java application, I call my Epsilon codes. I do this process For EOL and ETL, but for EPL I've faced with some problems. I did similar to EOL for EPL, but I get several errors in parser. For example, I get an error on 'pattern' key word that is defined in my EPL code. My EPL.java class contains the override of createModule(), getModels() , getSource() and postProcess() operations. Have I missed any things in EPL.java class? Do I do different from EOL for calling the EPL?

Report message to a moderator

Re: Using Epsilon in Java [message #1468509 is a reply to message #1468316]

Mon, 10 November 2014 22:37

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

Could you please post a minimal example [1] I can use to reproduce the issues you're encountering?

Cheers,
Dimitris

[1] https://www.eclipse.org/epsilon/doc/articles/minimal-examples/

Report message to a moderator

Re: Using Epsilon in Java [message #1469064 is a reply to message #1468509]

Tue, 11 November 2014 09:16

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi Dimitris,
Thanks for your quick reply. I attached one simple example.
in this example, 'CallEpsiloninJava.java' class is similar to 'EpsilonStandalonExample.java' and 'EplCodes.java' class is similar to 'EolStandaloneExample.java' class in org.eclipse.epsilon.example.standalone.
When I run 'EplCodes.java', I get these errors:
Parse errors occured...
Line: 2, Reason: mismatched input: 'pre'
Line: 3, Reason: no viable alternative at input '{'

I added 'org.eclipse.epsilon.epl.engine' to dependencies, but my problem wasn't solved!

Attachment: CallEpsiloninJava.zip
(Size: 10.38KB, Downloaded 282 times)

Report message to a moderator

Re: Using Epsilon in Java [message #1469080 is a reply to message #1469064]

Tue, 11 November 2014 09:33

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

The problem is that you're trying to parse EPL code using the EOL parser. You'd need to replace line 22 in "EplCodes.java" from

return new EolModule();

to

return new EplModule();

Cheers,
Dimitris

Report message to a moderator

Re: Using Epsilon in Java [message #1470288 is a reply to message #1469080]

Wed, 12 November 2014 08:11

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi Dimitris,
Thanks in advanced:)
This was indeed missing and works fine now:)

[Updated on: Sun, 16 November 2014 18:56]

Report message to a moderator

Re: Using Epsilon in Java [message #1475974 is a reply to message #1470288]

Sun, 16 November 2014 18:54

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi,
After using the Epsilon in java application (Standalone epsilon) I've faced with a problem for interactive Epsilon codes that used the IUserinput interface. In fact, I get this error:
"Undefined variable, type or model: 'Iuserinput'.
I searched on this forum and see this topic: http://www.eclipse.org/forums/index.php/t/209012/. I follow this topic and it seems that this problem is solved, But I can't use Iuserinputs in any Epsilon language!
My question is, if this problem is solved, why it doesn't work in Epsilon 1.2?

Regards

Report message to a moderator

Re: Using Epsilon in Java [message #1477452 is a reply to message #1475974]

Mon, 17 November 2014 22:57

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

Does the following work for you?

EolModule module = new EolModule();
module.parse("System.user.prompt('1+1=?').println();");
module.execute();

Cheers,
Dimitris

Report message to a moderator

Re: Using Epsilon in Java [message #1477871 is a reply to message #1477452]

Tue, 18 November 2014 07:17

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi dear Dimitris,
Yes, it truly works. But when I use the 'System.user.prompt('1+1=?')' in EOL, it can not be recognized as defined type.

Report message to a moderator

Re: Using Epsilon in Java [message #1478547 is a reply to message #1477871]

Tue, 18 November 2014 19:38

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

This seems to be working fine in the Epsilon 1.2 development tools. Could you please elaborate a bit more on this?

Cheers,
Dimitris

Report message to a moderator

Re: Using Epsilon in Java [message #1479291 is a reply to message #1478547]

Wed, 19 November 2014 10:08

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi Dimitris,
I Use 'System.user.prompt('1+1=?')' in Epsilon code and when I run this epsilon code, I get one dialog box for prompting the value. But when I run this Epsilon code via Java, I get this error:
Exception in thread "main" Undefined variable, type or model: 'System'

I've attached one simple example. In this example, The epsilon code (pattern.epl) uses the 'System.user.prompt('1+1=?')' and run successfully. When I run this epsilon by the commands of java in 'EplCodes.java' I get the above error! I think that something are lost in my codes!
Regards...

Attachment: CallEpsiloninJava.zip
(Size: 10.34KB, Downloaded 163 times)

Report message to a moderator

Re: Using Epsilon in Java [message #1479455 is a reply to message #1479291]

Wed, 19 November 2014 12:46

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

Sorry about that. This has been now fixed in the SVN. If you're not running Epsilon from source, replacing your createModule() method with the following should do the trick.

@Override
public IEolExecutableModule createModule() {
	EplModule module = EplModule();
	module.getContext().getFrameStack().putGlobal(Variable.createReadOnlyVariable("System",new EolSystem()));
	return module;
}

Cheers,
Dimitris

[Updated on: Wed, 19 November 2014 12:46]

Report message to a moderator

Re: Using Epsilon in Java [message #1485979 is a reply to message #1479455]

Mon, 24 November 2014 18:17

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi Dimitris,
Thanks again for your reply and excuse me for the my late reply.
I change createModule() but I think this is necessary to change execute method, So What url of SVN can help me to see this fixed standalone example?
Regards

[Updated on: Mon, 24 November 2014 18:19]

Report message to a moderator

Re: Using Epsilon in Java [message #1492512 is a reply to message #1485979]

Sat, 29 November 2014 23:03

Dimitris Kolovos is currently offline

Dimitris Kolovos

Friend

Messages: 2162
Registered: July 2009
Location: York, UK

Senior Member

Hi Mahsa,

Apologies for the slow response. Why is it necessary to change the execute method? To get a copy of the bleeding-edge version of Epsilon that contains the fix to EplModule, you'll need to check out the source from the SVN: https://www.eclipse.org/epsilon/doc/articles/epsilon-source-svn/

Cheers,
Dimitris

Report message to a moderator

Re: Using Epsilon in Java [message #1495997 is a reply to message #1492512]

Tue, 02 December 2014 17:48

Mahsa P is currently offline

Friend

Messages: 115
Registered: July 2013

Senior Member

Hi Dimitris,
Thanks for your reply. Your answers always help me.
I changed createModule() method to :

@Override
	public IEolExecutableModule createModule() {
		EplModule module =new  EplModule();
		EolSystem system = new EolSystem();
		 system.setContext(module.getContext());
	module.getContext().getFrameStack().putGlobal(Variable.createReadOnlyVariable("System",system));
		return module;
		}

Now 'system' is recognized as a type and this works true.
I meant to change the 'execute()' method for getting the windowed input-apologies for any confusion caused. I checked the several versions of standalone example and there isn't windowed input case in them.
I replaced the default userInput to a JFaceUserInput in execute() method, but I got another errors on 'org.eclipse.jface.dialogs.IInputValidator'. Now I'm trying to correct it...

[Updated on: Tue, 02 December 2014 17:55]

Report message to a moderator

Switch to threaded view of this topic

Create a new topic

Submit Reply

Previous Topic:	[EWL] EMF proxies resolving
Next Topic:	Starting with EGL

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Tue Apr 16 08:57:00 GMT 2024

Powered by FUDForum. Page generated in 0.39672 seconds

.:: Contact :: Home ::.

Powered by: FUDforum 3.0.2.
Copyright ©2001-2010 FUDforum Bulletin Board Software

Back to the top