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Passing parameters [message #1719282]

Wed, 06 January 2016 18:58

Geoffry Roberts

Messages: 8
Registered: January 2016

Junior Member

I want to run epsilon scripts server side, which means passing parameters to them. I read about how to do this with ant tasks, but would rather get it done from java.

I tried using the ConsoleUserInput class, but it seems its chooseMany method is not implemented. My first up use case is to do a transformation driven by a collection of values.

Am I barking up the wrong tree here?

Thanks

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Re: Passing parameters [message #1719284 is a reply to message #1719282]

Wed, 06 January 2016 19:07

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

Hi Geoffry,

Do you need the user to provide values for these parameters at runtime? If values are known in advance, you could use Epsilon's API to pass parameters to programs as follows:

EolModule module = ...;
module.parse(...);
Variable parameter = ...;
module.getContext().getFrameStack().put(parameter);

Cheers,
Dimitris

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Re: Passing parameters [message #1719288 is a reply to message #1719284]

Wed, 06 January 2016 19:21

Geoffry Roberts

Messages: 8
Registered: January 2016

Junior Member

Thanks for the quick response.

Yes, I want to pass parameters at runtime. I envision this all happening in a web app. EMF/Epsilon would reside behind a REST call with parameters coming in from user actions on a web page.

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Re: Passing parameters [message #1719289 is a reply to message #1719288]

Wed, 06 January 2016 19:22

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

Hi Geoffry,

The suggested solution should work well for this use case.

Cheers,
Dimitris

[Updated on: Wed, 06 January 2016 19:22]

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Re: Passing parameters [message #1719291 is a reply to message #1719289]

Wed, 06 January 2016 19:50

Geoffry Roberts

Messages: 8
Registered: January 2016

Junior Member

Here's what I have. Am I on target? I haven't finished my etl script yet.

// Load emf model from xmi file
InMemoryEmfModel model = loadData("profiles/profile-2.7.xmi");
// load etl script from etl file
IEolExecutableModule module = loadModule("first.etl");
// Create parameters
Set<String> set = new HashSet<String>();
set.add("aaa");
set.add("bbb");
set.add("ccc");
Variable params = new Variable("messageIds", set, EolCollectionType.Set);
module.getContext().getFrameStack().put(params);
module.getContext().getModelRepository().addModel(model);

// Run it all.
module.execute();

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