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Cast Errors in a Custom Metamodel [message #1809479]

Tue, 16 July 2019 13:58

Eclipse User

Hello,

I created a custom metamodel and an instance of it. The metamodel handles some metadata from the KDM metamodel. Specifically, KDMEntity and AbstractStructureElement. I attached the metamodel RMSAS for better understanding.

When I create an instance manually, everything works fine but when I need to open the instance with the reflective ecore model editor, it raises cast errors.

StorableUnitImpl cannot be cast to KDMEntity.

org.eclipse.emf.ecore.xmi.IllegalValueException: Value 'org.eclipse.gmt.modisco.omg.kdm.code.impl.StorableUnitImpl@56479f53
..
..
Caused by: java.lang.ClassCastException: org.eclipse.gmt.modisco.omg.kdm.code.impl.StorableUnitImpl cannot be cast to kdm.core.KDMEntity

and
ComponentImpl cannot be cast to AbstractStructureElement

org.eclipse.emf.ecore.xmi.IllegalValueException: Value 'org.eclipse.gmt.modisco.omg.kdm.structure.impl.ComponentImpl@78ca78cd 
..
..
Caused by: java.lang.ClassCastException: org.eclipse.gmt.modisco.omg.kdm.structure.impl.ComponentImpl cannot be cast to kdm.structure.AbstractStructureElement

I use KDMEntity because I want to represent StorableUnits, ClassUnits and MethodUnits and from the structure package AbstractStructureElement because I want to represent Components and Subsystems.

How can I solve these issues?. What kind of metadata do I should use to avoid casts errors?

Regards,

Daniel

Attachment: RMSAS.png
(Size: 317.09KB, Downloaded 109 times)

[Updated on: Tue, 16 July 2019 21:48] by Moderator

Re: Cast Errors in a Custom Metamodel [message #1809583 is a reply to message #1809479]

Thu, 18 July 2019 10:04

Eclipse User

Hello,

I changed some things in my project. When I try to run as eclipse runtime and create a new model it raises the follwing error.

Caused by: java.lang.NoClassDefFoundError: org/eclipse/gmt/modisco/omg/kdm/core/provider/KdmEditPlugin

I also changed restriction rules to accesible.

Thanks,

Re: Cast Errors in a Custom Metamodel [message #1809713 is a reply to message #1809583]

Sun, 21 July 2019 19:26

Eclipse User

I resolved it by creating the model programmatically.

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