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Null pointer on workbench close [message #331302]

Fri, 29 August 2008 12:44

Pierre Padovani

Messages: 6
Registered: July 2009

Junior Member

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All,
I followed the EMF/GMF editor integration example, and have run across
an odd shutdown issue under Eclipse 3.4. If I leave my editor open and
exit the workbench, I get a null pointer exception on line 869 of the
WorkbenchMenuService:

/*
* (non-Javadoc)
*
* @see
org.eclipse.ui.internal.menus.IMenuService#releaseMenu(org.e clipse.jface.action.ContributionManager)
*/
public void releaseContributions(ContributionManager mgr) {
// Recursive remove any contributions from sub-menus
---->>> IContributionItem[] items = mgr.getItems();
for (int i = 0; i < items.length; i++) {
if (items[i] instanceof ContributionManager) {
releaseContributions((ContributionManager)
items[i]);
} else if (items[i] instanceof
IToolBarContributionItem) {
IToolBarContributionItem tbci =
(IToolBarContributionItem) items[i];
releaseContributions((ContributionManager)
tbci
.getToolBarManager());
}
}

// Now remove any cached information
ManagerPopulationRecord mpr = (ManagerPopulationRecord)
populatedManagers.remove(mgr);
if (mpr != null)
mpr.releaseContributions();
managersAwaitingUpdates.remove(mgr);
}

Obviously the passed in ContributionManager is null. I've tested the
existing topicmap (EMF/GMF example code) and it behaves the same way.

One other data point. If I manually close the editor first, then I don't
see this problem. My editor's dispose() method is being called in both
cases.

Thoughts? Ideas?

Thanks!

Pierre

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 All,
    I followed the EMF/GMF
editor integration example, and have run across an odd shutdown issue under
Eclipse 3.4. If I leave my editor open and exit the workbench, I get a
null pointer exception on line 869 of the WorkbenchMenuService:
 
         /*
      
   * (non-Javadoc)
      
   * 
      
   * @see org.eclipse.ui.internal.menus.IMenuService#releaseMenu(org.e clipse.jface.action.ContributionManager) 
      
   */
         public
void
releaseContributions(ContributionManager mgr) {
          
      //
Recursive remove any contributions from sub-menus
 ---->>>      
 IContributionItem[] items = mgr.getItems();
          
      for
(int
i = 0; i < items.length; i++) {
          
              if
(items[i] instanceof
ContributionManager) {
          
               
      releaseContributions((ContributionManager)
items[i]);
          
              } else
if
(items[i] instanceof
IToolBarContributionItem) {
          
               
      IToolBarContributionItem tbci = (IToolBarContributionItem)
items[i];
          
               
      releaseContributions((ContributionManager)
tbci
          
               
               
      .getToolBarManager());
          
              }
          
      }
          
      
          
      //
Now remove any cached information
          
      ManagerPopulationRecord mpr = (ManagerPopulationRecord)
populatedManagers.remove(mgr);
          
      if
(mpr != null)
          
              mpr.releaseContributions();
          
      managersAwaitingUpdates.remove(mgr);
         }
 
   Obviously the passed in ContributionManager
is null. I've tested the existing topicmap (EMF/GMF example code) and it
behaves the same way. 
 
   One other data point. If I manually
close the editor first, then I don't see this problem. My editor's dispose()
method is being called in both cases.
 
 
   Thoughts? Ideas?
 
   Thanks!
 
   Pierre
 
 
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