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

Example 31 with Provider

use of com.google.inject.Provider in project guice by google.

the class OptionalBinderTest method testSpreadAcrossModules.

public void testSpreadAcrossModules() throws Exception {
    Module module1 = new AbstractModule() {

        @Override
        protected void configure() {
            OptionalBinder.newOptionalBinder(binder(), String.class);
        }
    };
    Module module2 = new AbstractModule() {

        @Override
        protected void configure() {
            OptionalBinder.newOptionalBinder(binder(), String.class).setDefault().toInstance("a");
        }
    };
    Module module3 = new AbstractModule() {

        @Override
        protected void configure() {
            OptionalBinder.newOptionalBinder(binder(), String.class).setBinding().toInstance("b");
        }
    };
    Injector injector = Guice.createInjector(module1, module2, module3);
    assertEquals("b", injector.getInstance(String.class));
    Optional<String> optional = injector.getInstance(Key.get(optionalOfString));
    assertTrue(optional.isPresent());
    assertEquals("b", optional.get());
    Optional<Provider<String>> optionalP = injector.getInstance(Key.get(optionalOfProviderString));
    assertTrue(optionalP.isPresent());
    assertEquals("b", optionalP.get().get());
    Optional<javax.inject.Provider<String>> optionalJxP = injector.getInstance(Key.get(optionalOfJavaxProviderString));
    assertTrue(optionalJxP.isPresent());
    assertEquals("b", optionalJxP.get().get());
    assertOptionalVisitor(stringKey, setOf(module1, module2, module3), VisitType.BOTH, 0, instance("a"), instance("b"), null);
    if (HAS_JAVA_OPTIONAL) {
        optional = toOptional(injector.getInstance(Key.get(javaOptionalOfString)));
        assertTrue(optional.isPresent());
        assertEquals("b", optional.get());
        optionalP = toOptional(injector.getInstance(Key.get(javaOptionalOfProviderString)));
        assertTrue(optionalP.isPresent());
        assertEquals("b", optionalP.get().get());
        optionalJxP = toOptional(injector.getInstance(Key.get(javaOptionalOfJavaxProviderString)));
        assertTrue(optionalJxP.isPresent());
        assertEquals("b", optionalJxP.get().get());
    }
}

Example 32 with Provider

use of com.google.inject.Provider in project guice by google.

the class MapBinderTest method testProviderMultimapDependencyInjection.

/** Ensure there are no initialization race conditions in provider multimap injection. */
public void testProviderMultimapDependencyInjection() {
    final AtomicReference<Map<String, Set<Provider<String>>>> injectedMultimap = new AtomicReference<Map<String, Set<Provider<String>>>>();
    final Object anObject = new Object() {

        @Inject
        void initialize(Map<String, Set<Provider<String>>> multimap) {
            injectedMultimap.set(multimap);
        }
    };
    Module abc = new AbstractModule() {

        @Override
        protected void configure() {
            requestInjection(anObject);
            MapBinder<String, String> multibinder = MapBinder.newMapBinder(binder(), String.class, String.class);
            multibinder.permitDuplicates();
            multibinder.addBinding("a").toInstance("A");
            multibinder.addBinding("b").toInstance("B");
            multibinder.addBinding("c").toInstance("C");
        }
    };
    Guice.createInjector(abc);
    Map<String, String> map = Maps.transformValues(injectedMultimap.get(), new Function<Set<Provider<String>>, String>() {

        @Override
        public String apply(Set<Provider<String>> stringProvidersSet) {
            return Iterables.getOnlyElement(stringProvidersSet).get();
        }
    });
    assertEquals(mapOf("a", "A", "b", "B", "c", "C"), map);
}

Example 33 with Provider

use of com.google.inject.Provider in project guice by google.

the class MapBinderTest method testMapBinderProviderIsScoped.

public void testMapBinderProviderIsScoped() {
    final Provider<Integer> counter = new Provider<Integer>() {

        int next = 1;

        @Override
        public Integer get() {
            return next++;
        }
    };
    Injector injector = Guice.createInjector(new AbstractModule() {

        @Override
        protected void configure() {
            MapBinder.newMapBinder(binder(), String.class, Integer.class).addBinding("one").toProvider(counter).asEagerSingleton();
        }
    });
    assertEquals(1, (int) injector.getInstance(Key.get(mapOfInteger)).get("one"));
    assertEquals(1, (int) injector.getInstance(Key.get(mapOfInteger)).get("one"));
}

Example 34 with Provider

use of com.google.inject.Provider in project guice by google.

the class MultibinderTest method testMultibinderCanInjectCollectionOfProviders.

public void testMultibinderCanInjectCollectionOfProviders() {
    Module module = new AbstractModule() {

        @Override
        protected void configure() {
            final Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
            multibinder.addBinding().toProvider(Providers.of("A"));
            multibinder.addBinding().toProvider(Providers.of("B"));
            multibinder.addBinding().toInstance("C");
        }
    };
    Collection<String> expectedValues = ImmutableList.of("A", "B", "C");
    Injector injector = Guice.createInjector(module);
    Collection<Provider<String>> providers = injector.getInstance(Key.get(collectionOfProvidersOfStrings));
    assertEquals(expectedValues, collectValues(providers));
    Collection<javax.inject.Provider<String>> javaxProviders = injector.getInstance(Key.get(collectionOfJavaxProvidersOf(stringType)));
    assertEquals(expectedValues, collectValues(javaxProviders));
}

Example 35 with Provider

use of com.google.inject.Provider in project guice by google.

the class OptionalBinderTest method testLinkedToNullProvidersMakeAbsentValuesAndPresentProviders_default.

public void testLinkedToNullProvidersMakeAbsentValuesAndPresentProviders_default() throws Exception {
    Module module = new AbstractModule() {

        @Override
        protected void configure() {
            OptionalBinder.newOptionalBinder(binder(), String.class).setDefault().toProvider(Providers.<String>of(null));
        }
    };
    Injector injector = Guice.createInjector(module);
    assertNull(injector.getInstance(String.class));
    Optional<String> optional = injector.getInstance(Key.get(optionalOfString));
    assertFalse(optional.isPresent());
    Optional<Provider<String>> optionalP = injector.getInstance(Key.get(optionalOfProviderString));
    assertTrue(optionalP.isPresent());
    assertNull(optionalP.get().get());
    Optional<javax.inject.Provider<String>> optionalJxP = injector.getInstance(Key.get(optionalOfJavaxProviderString));
    assertTrue(optionalJxP.isPresent());
    assertNull(optionalJxP.get().get());
    assertOptionalVisitor(stringKey, setOf(module), VisitType.BOTH, 0, SpiUtils.<String>providerInstance(null), null, null);
    if (HAS_JAVA_OPTIONAL) {
        optional = toOptional(injector.getInstance(Key.get(javaOptionalOfString)));
        assertFalse(optional.isPresent());
        optionalP = toOptional(injector.getInstance(Key.get(javaOptionalOfProviderString)));
        assertTrue(optionalP.isPresent());
        assertNull(optionalP.get().get());
        optionalJxP = toOptional(injector.getInstance(Key.get(javaOptionalOfJavaxProviderString)));
        assertTrue(optionalJxP.isPresent());
        assertNull(optionalJxP.get().get());
    }
}