topic NullPointerException in ActivitiDiagramMatchingStrategy in Alfresco Archive

NullPointerException in ActivitiDiagramMatchingStrategy

mmaker1234 — Tue, 21 May 2013 11:09:19 GMT

Hello Activiti developers,I have Eclipse 4.2 (Juno) SR2 and everything run fine until I installed Activiti Designer 5.12. Then the following problem occurred: while editing Java code (usually but not mandatory in the Java perspective) and select "Open Declaration", "Open Implementation" or "Open Sup

Re: NullPointerException in ActivitiDiagramMatchingStrategy

mmaker1234 — Tue, 21 May 2013 12:30:52 GMT

The same error displays when you try to open a class through "Open Type" dialog (Ctrl-Shift-T in the Java perspective).

Both problems seems to happen in some strange cases:

The referred class.method() should be in a library;
The source of the class should be in a separate Eclipse project;
It seems the approach to provide the source of the library plays some role:
The source was attached before the installation of the Activiti Designer;
I tried to remove then attach the library source through Project -> Properties -> Java Build Path. The result was the same error (that is why I reported it);
Later I tried to:
- remove the library source (not the library itself) through Project -> Properties -> Java Build Path;
- invoke the "Open Declaration" (result was window with decompiled source and button "Attach Source");
- attach the library source using the "Attach Source" button.

Everything went back to fine.

(Weird, isn't it?)

Re: NullPointerException in ActivitiDiagramMatchingStrategy

tiesebarrell — Tue, 21 May 2013 19:17:18 GMT

I have provided a fix for these NPEs which should be included in the next release of Designer. It occurred in a different case IIRC, but the cause was the same faulty code in the matching strategy.