Support static JSR-250 injection

[keeganwitt]

OK, I'm not really sure where this would be implemented yet (or if it's even possible). Would it be possible to make the @Resource annotation work with requestStaticInjection? Here's a very Java-esque Groovy example

@Grab(group='com.google.inject', module='guice', version='3.0')
@Grab(group='com.mycila.guice.extensions', module='mycila-guice-jsr250', version='3.6.ga')
import javax.annotation.Resource;
import javax.inject.Inject;
import javax.inject.Named;
import com.google.inject.name.Names;
import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Stage;
import com.mycila.guice.ext.jsr250.Jsr250Module;
import com.mycila.guice.ext.closeable.CloseableModule;
public class Main {
    public static void main(String[] args) {
        Bean bean = new Bean();
        System.out.println("thing before injection='"+StaticBag.thing+"'");
        Injector injector = Guice.createInjector(Stage.PRODUCTION, new Jsr250Module(), new CloseableModule(), new AbstractModule() {
            @Override
            protected void configure() {
                requestStaticInjection(StaticBag.class);
                bind(String.class).annotatedWith(Names.named("thing")).toInstance("some string");
            }
        });
        injector.injectMembers(bean);
        System.out.println("thing after injection='"+StaticBag.thing+"'");
    }
    public static class Bean {}
    public static class StaticBag {
        // doesn't work
        @Resource
        // works
//        @Inject @Named("thing")
        public static String thing;
    }
}

One workaround is to include the binding to the static class (bind(StaticBag.class).toInstance(new StaticBag());) so that a reference to the statically injected class gets into the module, but this is a bit clunky.

[mathieucarbou]

Please send a PR :-)