Is your context argument != null ? On Fri, Jun 25, 2010 at 7:21 PM, Donald Whytock <[email protected]> wrote: > > One of the ServiceTracker constructors takes a Filter, but not a > filter String. Still, it shouldn't complain at compile time about > (BundleContext, String, null) as parameters regardless of whether I'm > using a bad String. > > My extension was called ShellTracker. I'd extended ServiceTracker > without making a constructor, assuming it'd use ServiceTracker's > constructors. So the statement that wouldn't compile was > > tracker = new ShellTracker(context, filterstring, null); > > I tried adding a constructor: > > Public ShellTracker(BundleContext context, String clazz, > ServiceTrackerCustomizer custom) > { super(context, clazz, custom); } > > That compiled, but at runtime it gave me a NullPointerException when > instantiating the ShellTracker. > > On Fri, Jun 25, 2010 at 12:57 PM, Richard S. Hall <[email protected]> > wrote: > > On 6/25/10 12:50, Donald Whytock wrote: > >> > >> Hi...Trying to extend ServiceTracker rather than use a > >> ServiceTrackerCustomizer, but when I try new ServiceTracker(context, > >> filter, null) I get a Cannot Find Symbol for constructor > >> ServiceTracker(BundleContext, String,<nullable>). > >> > >> The ServiceTracker javadoc talks about what happens if the customizer > >> parameter is null, so I assume it can be null? > >> > > > > Sure it can. Are you sure you have access to the class in your project set > > up? > > > > -> richard > > > > p.s. The middle string parameter is not a filter, but the name of a > > class...if you want to use a filter you need to create a filter. > > > >> Don > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: [email protected] > >> For additional commands, e-mail: [email protected] > >> > >> > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] >
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