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External Java Action to set a value [message #1741058]

Mon, 22 August 2016 10:48

Eclipse User

Hello there,

I hope you can help me with the following problem: I started from scratch using the BasicFamily example files. All went fine when importing. I modified the basicfamily.odesign in a way that when I double-click on a Man node a JFace Dialog is shown. Therefor I used a External Java Action having the following code:

package org.eclipse.sirius.sample.basicfamily.design.services;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;

import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.jface.window.Window;
import org.eclipse.sirius.business.api.action.AbstractExternalJavaAction;
import org.eclipse.sirius.sample.basicfamily.BasicfamilyPackage;
import org.eclipse.sirius.tools.api.ui.IExternalJavaAction;
import org.eclipse.ui.PlatformUI;

public class Test extends AbstractExternalJavaAction implements IExternalJavaAction {

	@Override
	public boolean canExecute(Collection<? extends EObject> args) {
		return true;
	}

	@Override
	public void execute(Collection<? extends EObject> args, Map<String, Object> options) {
		MyTitleAreaDialog dialog = new MyTitleAreaDialog(
				PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell());
		dialog.create();
		if (dialog.open() == Window.OK) {
				EStructuralFeature feature =  object.eClass().getEStructuralFeature(BasicfamilyPackage.MAN__NAME);
				object.eSet(feature , (Object)dialog.getFirstName());
			}
		}
	}
}

The class MyTitleAreaDialog is pretty unspectular. It is a TitleAreaDialog and has a method getFirstName() which is called when the user presses the OK button and retrieves the firstname the user entered before.
As you can see I just want to set the name of the Man node I double clicked on with the value the user entered in the dialog, especially using this line:

object.eSet(feature , (Object)dialog.getFirstName());

When I do so i receive the following ClassCastException pointing to that single line:
Quote:

Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to org.eclipse.emf.ecore.EObject
at org.eclipse.sirius.viewpoint.impl.DRepresentationElementImpl.eSet(DRepresentationElementImpl.java:259)
at org.eclipse.sirius.diagram.impl.DDiagramElementImpl.eSet(DDiagramElementImpl.java:348)
at org.eclipse.sirius.diagram.impl.DNodeImpl.eSet(DNodeImpl.java:734)
at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eSet(BasicEObjectImpl.java:1071)
at org.eclipse.sirius.sample.basicfamily.design.services.Test.execute(Test.java:48)
at org.eclipse.sirius.business.internal.helper.task.operations.ExternalJavaActionTask.execute(ExternalJavaActionTask.java:93)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:106)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:117)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.execute(ExecuteToolOperationTask.java:90)
at org.eclipse.sirius.business.api.helper.task.TaskExecutor.execute(TaskExecutor.java:64)
at org.eclipse.sirius.tools.api.command.SiriusCommand.doExecute(SiriusCommand.java:80)
at org.eclipse.emf.transaction.RecordingCommand.execute(RecordingCommand.java:135)
at org.eclipse.sirius.diagram.ui.tools.api.command.GMFCommandWrapper.doExecuteWithResult(GMFCommandWrapper.java:102)
at org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand.doExecute(AbstractTransactionalCommand.java:247)
at org.eclipse.emf.workspace.AbstractEMFOperation.execute(AbstractEMFOperation.java:150)
at org.eclipse.sirius.diagram.ui.tools.internal.commands.WrappingCommandIgnoringAffectedFiles.execute(WrappingCommandIgnoringAffectedFiles.java:124)
at org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:516)
... 41 more

Can someone please give me a hint what I do wrong? Is there maybe another even more easier way to set an attribute's value of a node that has been visually created before?

Thanks in advance!

Best
Alex

Re: External Java Action to set a value [message #1741102 is a reply to message #1741058]

Tue, 23 August 2016 03:00

Eclipse User

Hello,

I think that the "object" in your service is not the Man but the DDiagramElement associated to the Man. You can see that in the stack

DRepresentationElementImpl.eSet(DRepresentationElementImpl.java:259)

.
This corresponds to the code

        case ViewpointPackage.DREPRESENTATION_ELEMENT__TARGET:
            setTarget((EObject) newValue);

You must replace the lines

EStructuralFeature feature =  object.eClass().getEStructuralFeature(BasicfamilyPackage.MAN__NAME);
object.eSet(feature , (Object)dialog.getFirstName());

By something like

Man aMan = (Man) ((DDiagramElement) object).getTarget();
EStructuralFeature feature =  aMan.eClass().getEStructuralFeature(BasicfamilyPackage.MAN__NAME);
aMan..eSet(feature , (Object)dialog.getFirstName());

Man aMan = (Man) ((DDiagramElement) object).getTarget();
aMan.setName(dialog.getFirstName());

or change your service call with the Man as parameter.

Regards,

Laurent

Re: External Java Action to set a value [message #1741113 is a reply to message #1741102]

Tue, 23 August 2016 03:53

Eclipse User

Dear Laurent,

thank you for your help.
I tried both of your suggestions, but both did not work. The class DDiagramElement is not recognizable by the framework. Even manually adding the import import org.eclipse.sirius.viewpoint.*; did not work, since it does not recognize the class. Do you have any idea how to fix this? Maybe I need to change the classpath somehow?

Another question:
Quote:

or change your service call with the Man as parameter.

How do I do that?

Thank you!

Best
Alex

Re: External Java Action to set a value [message #1741115 is a reply to message #1741113]

Tue, 23 August 2016 04:01

Eclipse User

For compilation problem, you have to add the plug-in org.eclipse.sirius in the dependencies of your plugin (in MANIFEST.MF file).

Re: External Java Action to set a value [message #1741117 is a reply to message #1741115]

Tue, 23 August 2016 04:09

Eclipse User

It is already added as shown in the screenshot. But in the exportet packages of the plugin org.eclipse.sirius, no org.eclipse.sirius.diagram or org.eclipse.sirius.viewpoint.DDiagramElement (as the special class) appears.

https://dl.dropboxusercontent.com/u/21492015/screen.PNG

I run out of ideas... Sad

Re: External Java Action to set a value [message #1741121 is a reply to message #1741117]

Tue, 23 August 2016 04:22

Eclipse User

Hi Alex,

DDiagramElement/DDIagram come from org.eclipse.sirius.diagram plugin.
I see two solutions: add the dependency to this plugin or cast to DSemanticDecorator which comes from org.eclipse.sirius and the Sirius core metamodel. It is the supertype of DDiagramElement which declares the target reference.

--
Maxime - Obeo

Need training or professional services for Sirius?
http://www.obeodesigner.com/sirius

Re: External Java Action to set a value [message #1741123 is a reply to message #1741117]

Tue, 23 August 2016 04:28

Eclipse User

Alex B. wrote on Tue, 23 August 2016 10:09

It is already added as shown in the screenshot. But in the exportet packages of the plugin org.eclipse.sirius,

Oops, sorry, the plug-in to import is org.eclipse.sirius.diagram (as said by Maxime).

Re: External Java Action to set a value [message #1741130 is a reply to message #1741123]

Tue, 23 August 2016 05:15

Eclipse User

Dear Maxime, dear Laurent,

thanks for your help. It worked now by adding the org.eclipse.sirius.diagram plugin, as both of you proposed.

Please allow me one more question. Is there any good documention on how to use the Sirius framework with EMF besides the specifier docs (https://www.eclipse.org/sirius/doc/specifier/Sirius%20Specifier%20Manual.html)?

Thank you!

Re: External Java Action to set a value [message #1741133 is a reply to message #1741130]

Tue, 23 August 2016 05:36

Eclipse User

Dear Alex,

You might find additional information in

Regards

--
Maxime - Obeo

Need training or professional services for Sirius?
http://www.obeodesigner.com/sirius

Re: External Java Action to set a value [message #1741177 is a reply to message #1741133]

Tue, 23 August 2016 10:11

Eclipse User

Thank you very much!

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