Eclipse Community Forums: Epsilon » Invoking UMLUtil as Native Object fails

Help

Home

Home » Modeling » Epsilon » Invoking UMLUtil as Native Object fails

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

Invoking UMLUtil as Native Object fails [message #1765690]

Tue, 13 June 2017 12:27

Luca Berardinelli

Messages: 54
Registered: June 2010
Location: Vienna

Member

Hi all,
I am trying to access the methods provided by UMLUtil during the executionn of a EGL file.

I now that java code can be invoked Native object as shown here

https://www.eclipse.org/epsilon/examples/index.php?example=org.eclipse.epsilon.examples.calljava

I copy pasted the code on this page within my EGL file and it works smoothly

var frame = new Native("javax.swing.JFrame");
frame.setBounds(100,100,200,200);
frame.title = "Opened from EOL";
frame.visible = true;

then I added the a new Native variable

var frame = new Native("javax.swing.JFrame");
var umlutil = new Native("org.eclipse.uml2.uml.util.UMLUtil");
frame.setBounds(100,100,200,200);
frame.title = "Opened from EOL";
frame.visible = true;

and EPSILON does not find the object.

My eclipse installation includes Papyrus and many other modeling tools so I suppose that the referenced object and library is included in my installation.

I need UMLUtil to invoke getBaseElement(). I know that I can do that by accessing base_<metaclass name> attribute of stereotype applications but I prefer to go through UMLUtil.

Thanks for any help.
Best,
Luca

Luca Berardinelli

[Updated on: Tue, 13 June 2017 12:38]

Report message to a moderator

Re: Invoking UMLUtil as Native Object fails [message #1765691 is a reply to message #1765690]

Tue, 13 June 2017 12:49

Dimitris Kolovos

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

Senior Member

Hi Luca,

You will need to declare UMLUtil as a "tool" using Epsilon's respective extension point as demonstrated in [1]. This is necessary due to the way Eclipse/OSGi manages classloaders (i.e. since the EOL engine plugin doesn't depend on the UML plugins, its classloader cannot access/load classes from the latter out of the box).

Cheers,
Dimitris

[1] https://www.eclipse.org/epsilon/doc/articles/call-java-from-epsilon/

[Updated on: Tue, 13 June 2017 14:37]

Report message to a moderator