public void testNullability() throws Exception {
Module module =
new AbstractModule() {
@Override
protected void configure() {
bind(String.class).toProvider(Providers.<String>of(null));
}
@SuppressWarnings("unused")
@Provides
Integer fail(String foo) {
return 1;
}
@SuppressWarnings("unused")
@Provides
Long succeed(@Nullable String foo) {
return 2L;
}
};
Injector injector = Guice.createInjector(module);
InjectionPoint fooPoint =
InjectionPoint.forMethod(
module.getClass().getDeclaredMethod("fail", String.class),
TypeLiteral.get(module.getClass()));
Dependency<?> fooDependency = Iterables.getOnlyElement(fooPoint.getDependencies());
runNullableTest(injector, fooDependency, module);
injector.getInstance(Long.class);
}
private void addInjectionPointDependencies(InjectionPoint injectionPoint) {
// Do not consider dependencies coming from optional injections.
if (injectionPoint.isOptional()) {
return;
}
for (Dependency<?> dependency : injectionPoint.getDependencies()) {
Key<?> key = dependency.getKey();
bindingsObserved.add(BindingInfo.create(key));
}
}
public static <T> Provider<T> providerForComponentFactory(
final ComponentFactory<T> componentFactory) {
// This method does exactly the same as com.google.inject.util.Providers#guicify
// Ensure that we inject all injection points from the delegate provider.
Set<InjectionPoint> injectionPoints =
InjectionPoint.forInstanceMethodsAndFields(componentFactory.getClass());
if (injectionPoints.isEmpty()) {
return new com.google.inject.Provider<T>() {
@Override
public T get() {
return componentFactory.newInstance();
}
@Override
public String toString() {
return "ComponentFactory: " + componentFactory.toString();
}
};
} else {
Set<Dependency<?>> mutableDeps = Sets.newHashSet();
for (InjectionPoint ip : injectionPoints) {
mutableDeps.addAll(ip.getDependencies());
}
final Set<Dependency<?>> dependencies = ImmutableSet.copyOf(mutableDeps);
return new ProviderWithDependencies<T>() {
@SuppressWarnings("unused")
@com.google.inject.Inject
void initialize(Injector injector) {
injector.injectMembers(componentFactory);
}
@Override
public Set<Dependency<?>> getDependencies() {
return dependencies;
}
@Override
public T get() {
return componentFactory.newInstance();
}
@Override
public String toString() {
return "ComponentFactory: " + componentFactory.toString();
}
};
}
}
private <T> ProviderMethod<T> createProviderMethod(
Binder binder, Method method, Annotation annotation) {
binder = binder.withSource(method);
Errors errors = new Errors(method);
// prepare the parameter providers
InjectionPoint point = InjectionPoint.forMethod(method, typeLiteral);
List<Dependency<?>> dependencies = point.getDependencies();
List<Provider<?>> parameterProviders = Lists.newArrayList();
for (Dependency<?> dependency : point.getDependencies()) {
parameterProviders.add(binder.getProvider(dependency));
}
@SuppressWarnings("unchecked") // Define T as the method's return type.
TypeLiteral<T> returnType = (TypeLiteral<T>) typeLiteral.getReturnType(method);
Key<T> key = getKey(errors, returnType, method, method.getAnnotations());
try {
key = scanner.prepareMethod(binder, annotation, key, point);
} catch (Throwable t) {
binder.addError(t);
}
Class<? extends Annotation> scopeAnnotation =
Annotations.findScopeAnnotation(errors, method.getAnnotations());
for (Message message : errors.getMessages()) {
binder.addError(message);
}
return ProviderMethod.create(
key,
method,
delegate,
ImmutableSet.copyOf(dependencies),
parameterProviders,
scopeAnnotation,
skipFastClassGeneration,
annotation);
}