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

Example 36 with Key

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

the class InjectorSpiTest method testExistingBinding.

public void testExistingBinding() {
    Injector injector = Guice.createInjector(new AbstractModule() {

        @Override
        protected void configure() {
            bind(Foo.class);
            bind(Baz.class);
        }
    });
    // Sanity check -- ensure we return the proper binding for all existing bindings.
    for (Map.Entry<Key<?>, Binding<?>> entry : injector.getAllBindings().entrySet()) {
        assertSame(entry.getValue(), injector.getExistingBinding(entry.getKey()));
    }
    // Now run through specifics...
    Binding<?> binding;
    // 1) non-Provider Foo.class
    binding = injector.getExistingBinding(Key.get(Foo.class));
    assertNotNull(binding);
    assertEquals(Foo.class, binding.getKey().getTypeLiteral().getRawType());
    // 2) Provider<Foo> class (should already exist, because Baz @Injects it).
    // the assertTrue is a bit stricter than necessary, but makes sure this works for pre-existing Provider bindings
    assertTrue(injector.getAllBindings().containsKey(Key.get(new TypeLiteral<Provider<Foo>>() {
    })));
    binding = injector.getExistingBinding(Key.get(new TypeLiteral<Provider<Foo>>() {
    }));
    assertNotNull(binding);
    assertEquals(Provider.class, binding.getKey().getTypeLiteral().getRawType());
    assertEquals(Foo.class, ((Provider) binding.getProvider().get()).get().getClass());
    // 3) non-Provider Baz.class
    binding = injector.getExistingBinding(Key.get(Baz.class));
    assertNotNull(binding);
    assertEquals(Baz.class, binding.getKey().getTypeLiteral().getRawType());
    // 4) Provider<Baz> class (should not already exist, because nothing used it yet).
    // the assertFalse is a bit stricter than necessary, but makes sure this works for non-pre-existing Provider bindings
    assertFalse(injector.getAllBindings().containsKey(Key.get(new TypeLiteral<Provider<Baz>>() {
    })));
    binding = injector.getExistingBinding(Key.get(new TypeLiteral<Provider<Baz>>() {
    }));
    assertNotNull(binding);
    assertEquals(Provider.class, binding.getKey().getTypeLiteral().getRawType());
    assertEquals(Baz.class, ((Provider) binding.getProvider().get()).get().getClass());
    // 5) non-Provider Bar, doesn't exist.
    assertNull(injector.getExistingBinding(Key.get(Bar.class)));
    // 6) Provider Bar, doesn't exist.
    assertNull(injector.getExistingBinding(Key.get(new TypeLiteral<Provider<Bar>>() {
    })));
}

Example 37 with Key

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

the class ProviderMethodsTest method testProviderMethods.

@SuppressWarnings("unchecked")
public void testProviderMethods() {
    Injector injector = Guice.createInjector(this);
    Bob bob = injector.getInstance(Bob.class);
    assertEquals("A Bob", bob.getName());
    Bob clone = injector.getInstance(Bob.class);
    assertEquals("A Bob", clone.getName());
    assertNotSame(bob, clone);
    assertSame(bob.getDaughter(), clone.getDaughter());
    Key soleBobKey = Key.get(Bob.class, Sole.class);
    assertSame(injector.getInstance(soleBobKey), injector.getInstance(soleBobKey));
}

Example 38 with Key

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

the class OverrideModuleTest method testFailsIfOverridenScopeInstanceHasBeenUsed.

public void testFailsIfOverridenScopeInstanceHasBeenUsed() {
    final Scope scope = new Scope() {

        public <T> Provider<T> scope(Key<T> key, Provider<T> unscoped) {
            return unscoped;
        }

        @Override
        public String toString() {
            return "ORIGINAL SCOPE";
        }
    };
    final Module original = new AbstractModule() {

        @Override
        protected void configure() {
            bindScope(TestScopeAnnotation.class, scope);
            bind(Date.class).in(scope);
            bind(String.class).in(scope);
        }
    };
    Module originalWrapper = new AbstractModule() {

        @Override
        protected void configure() {
            install(original);
        }
    };
    Module replacements = new AbstractModule() {

        @Override
        protected void configure() {
            bindScope(TestScopeAnnotation.class, new SingleUseScope());
        }
    };
    try {
        createInjector(Modules.override(originalWrapper).with(replacements));
        fail("Exception expected");
    } catch (CreationException e) {
        assertContains(e.getMessage(), "1) The scope for @TestScopeAnnotation is bound directly and cannot be overridden.", "original binding at " + original.getClass().getName() + ".configure(", asModuleChain(originalWrapper.getClass(), original.getClass()), "bound directly at " + original.getClass().getName() + ".configure(", asModuleChain(originalWrapper.getClass(), original.getClass()), "bound directly at " + original.getClass().getName() + ".configure(", asModuleChain(originalWrapper.getClass(), original.getClass()), "at ", replacements.getClass().getName() + ".configure(", asModuleChain(Modules.OverrideModule.class, replacements.getClass()));
    }
}

Example 39 with Key

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

the class ContextScope method scope.

public <T> Provider<T> scope(final Key<T> key, final Provider<T> unscoped) {
    return new Provider<T>() {

        public T get() {
            synchronized (ContextScope.class) {
                final Stack<WeakReference<Context>> stack = getContextStack();
                // The context should never be finalized as long as the provider is still in memory
                final Context context = stack.peek().get();
                final Map<Key<?>, Object> objectsForScope = getScopedObjectMap(context);
                if (objectsForScope == null)
                    // May want to consider throwing an exception here (if provider is used after onDestroy())
                    return null;
                @SuppressWarnings({ "unchecked" }) T current = (T) objectsForScope.get(key);
                if (current == null && !objectsForScope.containsKey(key)) {
                    current = unscoped.get();
                    objectsForScope.put(key, current);
                }
                return current;
            }
        }
    };
}

Example 40 with Key

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

the class SpiUtils method optionalModuleTest.

@SuppressWarnings({ "unchecked", "rawtypes" })
private static <T> void optionalModuleTest(Key<T> keyType, Iterable<? extends Module> modules, int expectedOtherOptionalBindings, BindResult<?> expectedDefault, BindResult<?> expectedActual, BindResult<?> expectedUserLinkedActual) {
    if (expectedUserLinkedActual != null) {
        assertNull("cannot have actual if expecting user binding", expectedActual);
        assertNull("cannot have default if expecting user binding", expectedDefault);
    }
    Set<Element> elements = ImmutableSet.copyOf(Elements.getElements(modules));
    Map<Key<?>, Binding<?>> indexed = index(elements);
    Key<Optional<T>> optionalKey = keyType.ofType(OptionalBinder.optionalOf(keyType.getTypeLiteral()));
    Key<?> javaOptionalKey = HAS_JAVA_OPTIONAL ? keyType.ofType(OptionalBinder.javaOptionalOf(keyType.getTypeLiteral())) : null;
    Visitor visitor = new Visitor();
    OptionalBinderBinding<Optional<T>> optionalBinder = null;
    OptionalBinderBinding<?> javaOptionalBinder = null;
    Key<?> defaultKey = null;
    Key<?> actualKey = null;
    Binding optionalBinding = indexed.get(optionalKey);
    optionalBinder = (OptionalBinderBinding<Optional<T>>) optionalBinding.acceptTargetVisitor(visitor);
    if (HAS_JAVA_OPTIONAL) {
        Binding javaOptionalBinding = indexed.get(javaOptionalKey);
        javaOptionalBinder = (OptionalBinderBinding) javaOptionalBinding.acceptTargetVisitor(visitor);
    }
    // Locate the defaultKey & actualKey
    for (Element element : elements) {
        if (optionalBinder.containsElement(element) && element instanceof Binding) {
            Binding binding = (Binding) element;
            if (isSourceEntry(binding, Source.DEFAULT)) {
                defaultKey = binding.getKey();
            } else if (isSourceEntry(binding, Source.ACTUAL)) {
                actualKey = binding.getKey();
            }
        }
    }
    assertNotNull(optionalBinder);
    if (HAS_JAVA_OPTIONAL) {
        assertNotNull(javaOptionalBinder);
    }
    assertEquals(expectedDefault == null, defaultKey == null);
    assertEquals(expectedActual == null, actualKey == null);
    Key<Optional<javax.inject.Provider<T>>> optionalJavaxProviderKey = keyType.ofType(optionalOfJavaxProvider(keyType.getTypeLiteral()));
    Key<?> javaOptionalJavaxProviderKey = HAS_JAVA_OPTIONAL ? keyType.ofType(javaOptionalOfJavaxProvider(keyType.getTypeLiteral())) : null;
    Key<Optional<Provider<T>>> optionalProviderKey = keyType.ofType(optionalOfProvider(keyType.getTypeLiteral()));
    Key<?> javaOptionalProviderKey = HAS_JAVA_OPTIONAL ? keyType.ofType(javaOptionalOfProvider(keyType.getTypeLiteral())) : null;
    boolean keyMatch = false;
    boolean optionalKeyMatch = false;
    boolean javaOptionalKeyMatch = false;
    boolean optionalJavaxProviderKeyMatch = false;
    boolean javaOptionalJavaxProviderKeyMatch = false;
    boolean optionalProviderKeyMatch = false;
    boolean javaOptionalProviderKeyMatch = false;
    boolean defaultMatch = false;
    boolean actualMatch = false;
    List<Object> otherOptionalElements = Lists.newArrayList();
    List<Element> otherContains = Lists.newArrayList();
    List<Element> nonContainedElements = Lists.newArrayList();
    for (Element element : elements) {
        boolean contains = optionalBinder.containsElement(element);
        if (HAS_JAVA_OPTIONAL) {
            assertEquals(contains, javaOptionalBinder.containsElement(element));
        }
        if (!contains) {
            nonContainedElements.add(element);
        }
        Key key = null;
        Binding b = null;
        if (element instanceof Binding) {
            b = (Binding) element;
            key = b.getKey();
            Object visited = b.acceptTargetVisitor(visitor);
            if (visited instanceof OptionalBinderBinding) {
                if (visited.equals(optionalBinder)) {
                    assertTrue(contains);
                } else if (HAS_JAVA_OPTIONAL && visited.equals(javaOptionalBinder)) {
                    assertTrue(contains);
                } else {
                    otherOptionalElements.add(visited);
                }
            }
        } else if (element instanceof ProviderLookup) {
            key = ((ProviderLookup) element).getKey();
        }
        if (key != null && key.equals(keyType)) {
            // keyType might match because a user bound it
            // (which is possible in a purely absent OptionalBinder)
            assertEquals(expectedDefault != null || expectedActual != null, contains);
            if (contains) {
                keyMatch = true;
            }
        } else if (key != null && key.equals(optionalKey)) {
            assertTrue(contains);
            optionalKeyMatch = true;
        } else if (key != null && key.equals(javaOptionalKey)) {
            assertTrue(contains);
            javaOptionalKeyMatch = true;
        } else if (key != null && key.equals(optionalJavaxProviderKey)) {
            assertTrue(contains);
            optionalJavaxProviderKeyMatch = true;
        } else if (key != null && key.equals(javaOptionalJavaxProviderKey)) {
            assertTrue(contains);
            javaOptionalJavaxProviderKeyMatch = true;
        } else if (key != null && key.equals(optionalProviderKey)) {
            assertTrue(contains);
            optionalProviderKeyMatch = true;
        } else if (key != null && key.equals(javaOptionalProviderKey)) {
            assertTrue(contains);
            javaOptionalProviderKeyMatch = true;
        } else if (key != null && key.equals(defaultKey)) {
            assertTrue(contains);
            if (b != null) {
                // otherwise it might just be a ProviderLookup into it
                assertTrue("expected: " + expectedDefault + ", but was: " + b, matches(b, expectedDefault));
                defaultMatch = true;
            }
        } else if (key != null && key.equals(actualKey)) {
            assertTrue(contains);
            if (b != null) {
                // otherwise it might just be a ProviderLookup into it
                assertTrue("expected: " + expectedActual + ", but was: " + b, matches(b, expectedActual));
                actualMatch = true;
            }
        } else if (contains) {
            otherContains.add(element);
        }
    }
    // only expect a keymatch if either default or actual are set
    assertEquals(expectedDefault != null || expectedActual != null, keyMatch);
    assertTrue(optionalKeyMatch);
    assertTrue(optionalJavaxProviderKeyMatch);
    assertTrue(optionalProviderKeyMatch);
    assertEquals(HAS_JAVA_OPTIONAL, javaOptionalKeyMatch);
    assertEquals(HAS_JAVA_OPTIONAL, javaOptionalJavaxProviderKeyMatch);
    assertEquals(HAS_JAVA_OPTIONAL, javaOptionalProviderKeyMatch);
    assertEquals(expectedDefault != null, defaultMatch);
    assertEquals(expectedActual != null, actualMatch);
    assertEquals(otherContains.toString(), 0, otherContains.size());
    assertEquals("other OptionalBindings found: " + otherOptionalElements, expectedOtherOptionalBindings, otherOptionalElements.size());
    // Validate that we can construct an injector out of the remaining bindings.
    Guice.createInjector(Elements.getModule(nonContainedElements));
}