Bug 32531 NPE importing preferences
Build id: 200302211557 Got error messages when importing preferences. I couldn't reproduce the problem anymore. Will attach stack traces (two generated in a row). Top entries are: java.lang.NullPointerException at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.rootsAndC ontainers(PackageExplorerContentProvider.java:153) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.getChildr en(PackageExplorerContentProvider.java:131) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.getFilteredChildre n(PackageExplorerPart.java:352) at org.eclipse.jface.viewers.StructuredViewer.getSortedChildren (StructuredViewer.java:555) at org.eclipse.jface.viewers.AbstractTreeViewer.updateChildren (AbstractTreeViewer.java:1282) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh (AbstractTreeViewer.java:925) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh (AbstractTreeViewer.java:934) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh (AbstractTreeViewer.java:895) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh (AbstractTreeViewer.java:881) at org.eclipse.jface.viewers.StructuredViewer$7.run(StructuredViewer.java:858) at org.eclipse.jface.viewers.StructuredViewer.preservingSelection (StructuredViewer.java:798) at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:856) at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:818) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart.propertyChange (PackageExplorerPart.java:1062)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerContentProvider.java
}
		
		if (processResourceDeltas(delta.getResourceDeltas(), element))
			return;
		handleAffectedChildren(delta, element);
	}
		
	private void handleAffectedChildren(IJavaElementDelta delta, IJavaElement element) throws JavaModelException {
		
		IJavaElementDelta[] affectedChildren= delta.getAffectedChildren();
		if (affectedChildren.length > 1) {
			
			if (element instanceof IPackageFragment) {
				IJavaElement parent= (IJavaElement)internalGetParent(element);
				
				
				if (element.equals(fInput)) {
					postRefresh(element);
				} else {
					postRefresh(parent);
				}
				return;
			}
			
			if (element instanceof IPackageFragmentRoot)
				postRefresh(skipProjectPackageFragmentRoot((IPackageFragmentRoot)element));
			else
				postRefresh(element);
			return;
		}