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icon4.gif  InstanceSpecification element on Composite diagram [message #1408232] Thu, 14 August 2014 14:59 Go to next message
Sofía Pérez is currently offline Sofía PérezFriend
Messages: 8
Registered: July 2014
Junior Member
I need to add an InstanceSpecification element to a palette in a plugin based on the Composite plugin.

This is how I added it to the palette:

<aspectTool description="Create an element with the QoSValue stereotype" iconpath="platform:/plugin/org.eclipse.uml2.uml.edit/icons/full/obj16/InstanceSpecification.gif" id="soamlqospl.tool.instancespecification_1408021993017" name="QoSValue" refToolId="soamlqospl.tool.instancespecification">
<postAction id="org.eclipse.papyrus.applystereotypeactionprovider">
<stereotype stereotypeName="SoaMLQoS::QoSValue"/>

Then I added the element to the UMLPaletteFactory class like this:

private final static String SOAMLQOS_PL_TOOL_INSTANCESPECIFICATION = "soamlqospl.tool.instancespecification";//$NON-NLS-1$

And I modified the method createTool and added this method:

private Tool createInstanceSpecification11CreationTool() {
List<IElementType> types = new ArrayList<IElementType>(2);
Tool tool = new AspectUnspecifiedTypeCreationTool(types);
return tool;

The elements InstanceSpecification_2001 and InstanceSpecification_3020 didn't exist in the UMLElementTypes class so I had to add them.

Finally, I also modified the plugin.xml adding the entry for InstanceSpecification under the .paletteDefinition extension.

With the above changes I'm getting a NullPointerException at org.eclipse.gmf.runtime.emf.type.core.requests.CreateElementRequest.getDefaultLabel(

The questions are:
1- Is it even possible to add an InstanceSpecification element to a palette in a Composite-based diagram?
2- If so, am I doing the right changes?
3- What else should I do?

Thank you so much,
Re: InstanceSpecification element on Composite diagram [message #1409508 is a reply to message #1408232] Mon, 18 August 2014 09:33 Go to previous message
Camille Letavernier is currently offline Camille LetavernierFriend
Messages: 926
Registered: February 2011
Senior Member
Hi Sofia,

If the diagram doesn't natively support the InstanceSpecification element, then modifying the palette will not be sufficient.

From Papyrus, we'd need to update the *.gmfgen model and regenerate the editor. However, you can't do that from an external plug-in, which means that all the modifications which can be generated would need to be done manually.

However, if you're willing to modify the Composite Diagram plug-in directly, then you should use only the *.gmfgen model, then regenerate the diagram. This is not really recommended however, as any modification to the real Papyrus Composite Diagram plug-in would most likely break your changes.

This is not really an extension we support in Papyrus (Although GMF allows that, so that's "feasible")


Camille Letavernier
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