@Reference annotation not working

I am missing something here. I am creating a new class and waht to have the resource resolver factory loaded using the @Reference annotation.

But it is not working and I am always getting an NPE when I use it.

Would someone help me to understand why? What am I missing?

Thanks.

@Component(metatype = false, immediate = true)

@Service(value = TestComponent.class)

@Properties({ @org.apache.felix.scr.annotations.Property(name = Constants.SERVICE_DESCRIPTION, value = "TestComponent"),

        @org.apache.felix.scr.annotations.Property(name = Constants.SERVICE_VENDOR, value = GeneralConstants.VENDOR),

        @org.apache.felix.scr.annotations.Property(name = "process.label", value = "TestComponent") })

public class TestComponentImpl implements TestComponent {

    protected static final Logger LOG = LoggerFactory.getLogger( TestComponent.class);

    @Reference( policy = ReferencePolicy.STATIC )

    private ResourceResolverFactory resolverFactory;