Examples with MembersInjector com.google.inject.MembersInjector used on opensource projects

Example 6 with MembersInjector

use of com.google.inject.MembersInjector in project camel by apache.

the class GuiceyFruitModule method bindAnnotationInjector.

private <A extends Annotation> void bindAnnotationInjector(final Class<A> annotationType, final EncounterProvider<AnnotationMemberProvider> memberProviderProvider) {
    bindListener(any(), new TypeListener() {

        Provider<? extends AnnotationMemberProvider> providerProvider;

        public <I> void hear(TypeLiteral<I> injectableType, TypeEncounter<I> encounter) {
            Set<Field> boundFields = Sets.newHashSet();
            Map<MethodKey, Method> boundMethods = Maps.newHashMap();
            TypeLiteral<?> startType = injectableType;
            while (true) {
                Class<?> type = startType.getRawType();
                if (type == Object.class) {
                    break;
                }
                Field[] fields = type.getDeclaredFields();
                for (Field field : fields) {
                    if (boundFields.add(field)) {
                        bindAnnotationInjectorToField(encounter, startType, field);
                    }
                }
                Method[] methods = type.getDeclaredMethods();
                for (final Method method : methods) {
                    MethodKey key = new MethodKey(method);
                    if (boundMethods.get(key) == null) {
                        boundMethods.put(key, method);
                        bindAnnotationInjectionToMember(encounter, startType, method);
                    }
                }
                Class<?> supertype = type.getSuperclass();
                if (supertype == Object.class) {
                    break;
                }
                startType = startType.getSupertype(supertype);
            }
        }

        protected <I> void bindAnnotationInjectionToMember(final TypeEncounter<I> encounter, final TypeLiteral<?> type, final Method method) {
            // TODO lets exclude methods with @Inject?
            final A annotation = method.getAnnotation(annotationType);
            if (annotation != null) {
                if (providerProvider == null) {
                    providerProvider = memberProviderProvider.get(encounter);
                }
                encounter.register(new MembersInjector<I>() {

                    public void injectMembers(I injectee) {
                        AnnotationMemberProvider provider = providerProvider.get();
                        int size = method.getParameterTypes().length;
                        Object[] values = new Object[size];
                        for (int i = 0; i < size; i++) {
                            Class<?> paramType = getParameterType(type, method, i);
                            Object value = provider.provide(annotation, type, method, paramType, i);
                            checkInjectedValueType(value, paramType, encounter);
                            // things
                            if (value == null && !provider.isNullParameterAllowed(annotation, method, paramType, i)) {
                                return;
                            }
                            values[i] = value;
                        }
                        try {
                            method.setAccessible(true);
                            method.invoke(injectee, values);
                        } catch (IllegalAccessException e) {
                            throw new ProvisionException("Failed to inject method " + method + ". Reason: " + e, e);
                        } catch (InvocationTargetException ie) {
                            Throwable e = ie.getTargetException();
                            throw new ProvisionException("Failed to inject method " + method + ". Reason: " + e, e);
                        }
                    }
                });
            }
        }

        protected <I> void bindAnnotationInjectorToField(final TypeEncounter<I> encounter, final TypeLiteral<?> type, final Field field) {
            // TODO lets exclude fields with @Inject?
            final A annotation = field.getAnnotation(annotationType);
            if (annotation != null) {
                if (providerProvider == null) {
                    providerProvider = memberProviderProvider.get(encounter);
                }
                encounter.register(new InjectionListener<I>() {

                    public void afterInjection(I injectee) {
                        AnnotationMemberProvider provider = providerProvider.get();
                        Object value = provider.provide(annotation, type, field);
                        checkInjectedValueType(value, field.getType(), encounter);
                        try {
                            field.setAccessible(true);
                            field.set(injectee, value);
                        } catch (IllegalAccessException e) {
                            throw new ProvisionException("Failed to inject field " + field + ". Reason: " + e, e);
                        }
                    }
                });
            }
        }
    });
}

Example 7 with MembersInjector

use of com.google.inject.MembersInjector in project roboguice by roboguice.

the class InjectorImpl method injectMembers.

// the members injector type is consistent with instance's type
@SuppressWarnings("unchecked")
public void injectMembers(Object instance) {
    MembersInjector membersInjector = getMembersInjector(instance.getClass());
    membersInjector.injectMembers(instance);
}

Example 8 with MembersInjector

use of com.google.inject.MembersInjector in project roboguice by roboguice.

the class InjectorImpl method createMembersInjectorBinding.

private <T> BindingImpl<MembersInjector<T>> createMembersInjectorBinding(Key<MembersInjector<T>> key, Errors errors) throws ErrorsException {
    Type membersInjectorType = key.getTypeLiteral().getType();
    if (!(membersInjectorType instanceof ParameterizedType)) {
        throw errors.cannotInjectRawMembersInjector().toException();
    }
    // safe because T came from Key<MembersInjector<T>>
    @SuppressWarnings("unchecked") TypeLiteral<T> instanceType = (TypeLiteral<T>) TypeLiteral.get(((ParameterizedType) membersInjectorType).getActualTypeArguments()[0]);
    MembersInjector<T> membersInjector = membersInjectorStore.get(instanceType, errors);
    InternalFactory<MembersInjector<T>> factory = new ConstantFactory<MembersInjector<T>>(Initializables.of(membersInjector));
    return new InstanceBindingImpl<MembersInjector<T>>(this, key, SourceProvider.UNKNOWN_SOURCE, factory, ImmutableSet.<InjectionPoint>of(), membersInjector);
}