Some Eclipse Foundation services are deprecated, or will be soon. Please ensure you've read this important communication.

Bug 319015

Summary:	[Model Browser] Null Pointer after deleting a field in a model
Product:	[Modeling] MoDisco	Reporter:	Nicolas Guyomar <nicolas.guyomar>
Component:	Technologies	Assignee:	Nicolas Bros <nicolas.bros>
Status:	CLOSED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	fabien.giquel, gdupe, hugo.bruneliere, modisco.web-inbox, nicolas.bros
Version:	0.9.0	Flags:	nicolas.bros: indigo+
Target Milestone:	0.9.0 M1
Hardware:	PC
OS:	Windows XP
Whiteboard:

Description Nicolas Guyomar

2010-07-06 10:43:21 EDT

Hi,

Using the MoDisco Java Discoverer, I encountered a null pointer exception after deleting a field in the java model.

To reproduce, simply create an "Hello World" java project, discover the source code with the MoDisco Java Discoverer.
Once the MoDisco Model Browser is opened, delete a field in a method declaration for example. The field dissapears, according to the correct behaviour.
Close the browser and try to open it again, you got the NullPointerException

Once the exception is raised, it is impossible to open the javaxmi, even after discovering it again, which led to the same exception

Regards

Comment 1 Nicolas Bros

2010-07-07 09:15:13 EDT

I cannot reproduce the error.
Could you please attach a model on which it happens, and tell me exactly which steps lead to the error? A stacktrace could be helpful too.

Comment 2 Nicolas Bros

2010-07-07 09:21:00 EDT

Scratch that! I misunderstood you, I thought you meant the error happened when you deleted a FieldDeclaration. But it in fact happens when you delete an attribute.

Comment 3 Nicolas Bros

2010-07-07 09:59:53 EDT

What happened is that when you deleted an attribute in the model browser, it in fact deleted the EAttribute from the metamodel (in the EPackage.Registry). This of course causes problems (both this bug and bug 319016).

I fixed it in revision 2667 by making sure elements from the EPackage.Registry cannot be deleted.

Comment 4 Hugo Bruneliere

2010-10-04 13:55:27 EDT

Bug fixed.