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[eol] question about usage of native types [message #664913]

Tue, 12 April 2011 09:29

Eclipse User

hi

i experimented with using native types in an ewl file. while the example from the book works

var frame = new Native("javax.swing.JFrame");

when i try to instance something else like

var util = new Native("org.eclipse.emf.ecore.util.EcoreUtil");

it fails with a "type not found" error message.
is there a way to make it known to epsilon?

thanks in advance

marco

Re: [eol] question about usage of native types [message #664936 is a reply to message #664913]

Tue, 12 April 2011 10:28

Eclipse User

ok found the article.

http://www.eclipse.org/gmt/epsilon/doc/articles/call-java-fr om-epsilon/

maybe this should be added to the book, too.

cheers

marco

[Updated on: Tue, 12 April 2011 10:28] by Moderator

Re: [eol] question about usage of native types [message #664961 is a reply to message #664936]

Tue, 12 April 2011 11:32

Eclipse User

ok, after reading the guide i realized it's working only for your own projects / classes...
help appreciated.

thanks

marco

Re: [eol] question about usage of native types [message #665005 is a reply to message #664961]

Tue, 12 April 2011 14:38

Eclipse User

Hi Marco,

I think it should actually be OK to also specify an existing class (that has an accessible constructor) in the "class" property of the extension.

Cheers,
Dimitris

Re: [eol] question about usage of native types [message #665163 is a reply to message #665005]

Wed, 13 April 2011 10:03

Eclipse User

hi dimitris

ah ok, didn't expect that to work.
besides that, it does not seem to work for internal classes
(tried it with "org.eclipse.emf.ecore.util.EcoreUtil.Copier").
instead i created a derived class now in my plugin, so it's not really
an issue.

cheers

marco

Re: [eol] question about usage of native types [message #665699 is a reply to message #665163]

Fri, 15 April 2011 10:35

Eclipse User

hi dimitris

i stumbled upon something else, maybe you can explain to me what is going on there.
what i do is, i create a org.eclipse.emf.ecore.util.EcoreUtil.Copier and deep-copy an UML Activity from my model.
(the activity contains some nodes and edges)

var ecoreUtil = new Native("myproject.MyCopier"); // extends org.eclipse.emf.ecore.util.EcoreUtil.Copier
var result = ecoreUtil.copy(self); // self is an uml Activity
ecoreUtil.copyReferences();
self.node.println(); // the sequence of contained nodes
result.node.println();

while the copying itself works just fine, the last line causes an exception stating "Property 'node' not found".
both 'self' and 'result' are of type Activity, and calling the java method .getNodes() (equivalent of '.node')
on them from eol gets the same results.
i guess it's something about how the objects are handled internally by epsilon,
maybe you can explain to me how this works (and if possible how to solve this).

cheers

marco

Re: [eol] question about usage of native types [message #665714 is a reply to message #665699]

Fri, 15 April 2011 11:10

Eclipse User

Hi Marco,

http://www.eclipse.org/gmt/epsilon/examples/index.php?exampl e=org.eclipse.epsilon.examples.clone - and in particular the comments in clone.eol - should help with this.

Cheers,
Dimitris

Re: [eol] question about usage of native types [message #666149 is a reply to message #665714]

Tue, 19 April 2011 07:03

Eclipse User

hi dimitris

ok, that one was easy.
thanks a lot, as always. Smile

cheers

marco

Re: [eol] question about usage of native types [message #669324 is a reply to message #666149]

Mon, 09 May 2011 18:17

Eclipse User

Hello Marco and Dimitris,

Can you give me any pointers on this subject. I have followed the article instructions but I am still getting Type 'MyTool' Type not found error. I also followed marco's advise and wrapped the actual library I want to use in my own class. (I am running this from a standalone setup).

Regards,

Horacio

Re: [eol] question about usage of native types [message #669572 is a reply to message #669324]

Tue, 10 May 2011 14:43

Eclipse User

Hi Horacio,

I believe that Epsilon tools are not available from a standalone setup, as these are loaded using Eclipse extension points. However, you should be able to create any class that is in your classpath through "new Native('...')".

Could you please try placing the class that you want to instantiate from EOL in the same classpath as the Java code which is launching your EOL scripts?

Cheers,
Antonio

[Updated on: Tue, 10 May 2011 14:44] by Moderator

Re: [eol] question about usage of native types [message #669587 is a reply to message #669572]

Tue, 10 May 2011 16:17

Eclipse User

Antonio,

My standalone setup is actually a set of plugins I run in my own RCP. I tried placing the class in the plugin's class path and it is still not found. This is what I have done using the extension point:

In my plugin.xml I have added the epsilon dt tools extension points to call my class:

...
<!-- Native Types used in Epsilon -->
    <extension point="org.eclipse.epsilon.common.dt.tool">
        <tool
            class="net.sourceforge.riskc.riskcopcode.generator.epsilon.RiskcSimMetrics"
            defaultName="SimMetrics">
        </tool>
    </extension>
...

In my manifest file I added the dt plugin as a required bundel:

...
Require-Bundle: org.eclipse.core.runtime,
 org.junit,
 org.eclipse.epsilon.common.dt,
 org.eclipse.epsilon.eol.engine,
 org.eclipse.epsilon.egl.engine,
 org.eclipse.epsilon.evl.engine,
 org.eclipse.epsilon.emc.emf,
...

Maybe I am missing something else? From my experience using the interactive mode in my other post, can it be that the egl is also not designed to work with native types?

Regards,

Horacio

[Updated on: Tue, 10 May 2011 17:03] by Moderator

Re: [eol] question about usage of native types [message #669700 is a reply to message #669587]

Wed, 11 May 2011 04:17

Eclipse User

Access to tools is another thing that is set up for you when you use the Epsilon launch configurations, but not when you simply use parse() and execute(). You will need to add the native type delegate which gives Epsilon access to your tool.

You can find the code you need to do that inside org.eclipse.epsilon.eol.dt.launching.EclipseContextManager#s etup(IEolContext). It's the last line in the method:

public static void setup(IEolContext context) {
  loadPrettyPrinters(context);
  loadIo(context);
  context.getNativeTypeDelegates().add(new ExtensionPointToolNativeTypeDelegate());
}

Please try that and tell us if it works for you.

Re: [eol] question about usage of native types [message #670867 is a reply to message #669700]

Sun, 15 May 2011 21:10

Eclipse User

Antonio,

Thank you for your answer, it worked flawlessly!

Now I have to figure out what is the best place/moment to add this.. perhaps in the

public IEolExecutableModule createModule()

method. Create the new specific type module, add the type delegate and return the module.

Best regards,

Horacio

[Updated on: Sun, 15 May 2011 21:12] by Moderator

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