Bug 270989 Context refactoring
Based on discussions over the past weeks, I'm doing a refactoring of the context API. Major changes: - Renamed IComputedValue to IContextFunction - Renamed *Value to *Function - Renamed UIContextScheduler to UISchedulerStrategy - Added concept of ILookupStrategy to delegate lookup of keys that are not yet defined in a given context - Re-implemented OSGi service support using lookup strategy I also fixed a couple of NPE's I found while testing with the e4 photo demo (null realms, etc)
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/BackgroundRunnerValue.java
public Object compute(IEclipseContext context, Object[] arguments) {
		return new IBackgroundRunner() {
			public void schedule(long delay, String name,
					final IRunnableWithProgress runnable) {
				new Job(name) {
					protected IStatus run(IProgressMonitor monitor) {
						return runnable.run(monitor);
					}
				}.schedule(delay);
			}
		};
	}
}