Examples with InstanceBinding com.google.inject.spi.InstanceBinding used on opensource projects

Example 1 with InstanceBinding

use of com.google.inject.spi.InstanceBinding in project roboguice by roboguice.

the class MultibinderTest method testSetAndMapValueAreDistinctInSpi.

// See issue 670
public void testSetAndMapValueAreDistinctInSpi() {
    Injector injector = Guice.createInjector(new AbstractModule() {

        @Override
        protected void configure() {
            Multibinder.newSetBinder(binder(), String.class).addBinding().toInstance("A");
            MapBinder.newMapBinder(binder(), String.class, String.class).addBinding("B").toInstance("b");
            OptionalBinder.newOptionalBinder(binder(), String.class).setDefault().toInstance("C");
        }
    });
    Collector collector = new Collector();
    Binding<Map<String, String>> mapbinding = injector.getBinding(Key.get(mapOfStringString));
    mapbinding.acceptTargetVisitor(collector);
    assertNotNull(collector.mapbinding);
    Binding<Set<String>> setbinding = injector.getBinding(Key.get(setOfString));
    setbinding.acceptTargetVisitor(collector);
    assertNotNull(collector.setbinding);
    Binding<Optional<String>> optionalbinding = injector.getBinding(Key.get(optionalOfString));
    optionalbinding.acceptTargetVisitor(collector);
    assertNotNull(collector.optionalbinding);
    // There should only be three instance bindings for string types
    // (but because of the OptionalBinder, there's 2 ProviderInstanceBindings also).
    // We also know the InstanceBindings will be in the order: A, b, C because that's
    // how we bound them, and binding order is preserved.
    List<Binding<String>> bindings = FluentIterable.from(injector.findBindingsByType(stringType)).filter(Predicates.instanceOf(InstanceBinding.class)).toList();
    assertEquals(bindings.toString(), 3, bindings.size());
    Binding<String> a = bindings.get(0);
    Binding<String> b = bindings.get(1);
    Binding<String> c = bindings.get(2);
    assertEquals("A", ((InstanceBinding<String>) a).getInstance());
    assertEquals("b", ((InstanceBinding<String>) b).getInstance());
    assertEquals("C", ((InstanceBinding<String>) c).getInstance());
    // Make sure the correct elements belong to their own sets.
    assertFalse(collector.mapbinding.containsElement(a));
    assertTrue(collector.mapbinding.containsElement(b));
    assertFalse(collector.mapbinding.containsElement(c));
    assertTrue(collector.setbinding.containsElement(a));
    assertFalse(collector.setbinding.containsElement(b));
    assertFalse(collector.setbinding.containsElement(c));
    assertFalse(collector.optionalbinding.containsElement(a));
    assertFalse(collector.optionalbinding.containsElement(b));
    assertTrue(collector.optionalbinding.containsElement(c));
}

Example 2 with InstanceBinding

use of com.google.inject.spi.InstanceBinding in project roboguice by roboguice.

the class MultibinderTest method testMultibinderDependenciesInToolStage.

/**
   * We just want to make sure that multibinder's binding depends on each of its values. We don't
   * really care about the underlying structure of those bindings, which are implementation details.
   */
public void testMultibinderDependenciesInToolStage() {
    Injector injector = Guice.createInjector(Stage.TOOL, new AbstractModule() {

        protected void configure() {
            Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
            multibinder.addBinding().toInstance("A");
            multibinder.addBinding().to(Key.get(String.class, Names.named("b")));
            bindConstant().annotatedWith(Names.named("b")).to("B");
        }
    });
    Binding<Set<String>> binding = injector.getBinding(new Key<Set<String>>() {
    });
    HasDependencies withDependencies = (HasDependencies) binding;
    InstanceBinding<?> instanceBinding = null;
    LinkedKeyBinding<?> linkedBinding = null;
    // the Key of @Named("b") String=B
    for (Dependency<?> dependency : withDependencies.getDependencies()) {
        Binding<?> b = injector.getBinding(dependency.getKey());
        if (b instanceof InstanceBinding) {
            if (instanceBinding != null) {
                fail("Already have an instance binding of: " + instanceBinding + ", and now want to add: " + b);
            } else {
                instanceBinding = (InstanceBinding) b;
            }
        } else if (b instanceof LinkedKeyBinding) {
            if (linkedBinding != null) {
                fail("Already have a linked binding of: " + linkedBinding + ", and now want to add: " + b);
            } else {
                linkedBinding = (LinkedKeyBinding) b;
            }
        } else {
            fail("Unexpected dependency of: " + dependency);
        }
    }
    assertNotNull(instanceBinding);
    assertNotNull(linkedBinding);
    assertEquals("A", instanceBinding.getInstance());
    assertEquals(Key.get(String.class, Names.named("b")), linkedBinding.getLinkedKey());
}

Example 3 with InstanceBinding

use of com.google.inject.spi.InstanceBinding in project roboguice by roboguice.

the class MapBinderTest method recurseForDependencies.

private Set<String> recurseForDependencies(Injector injector, HasDependencies hasDependencies) {
    Set<String> elements = Sets.newHashSet();
    for (Dependency<?> dependency : hasDependencies.getDependencies()) {
        Binding<?> binding = injector.getBinding(dependency.getKey());
        HasDependencies deps = (HasDependencies) binding;
        if (binding instanceof InstanceBinding) {
            elements.add((String) ((InstanceBinding<?>) binding).getInstance());
        } else {
            elements.addAll(recurseForDependencies(injector, deps));
        }
    }
    return elements;
}

Example 4 with InstanceBinding

use of com.google.inject.spi.InstanceBinding in project roboguice by roboguice.

the class OptionalBinderTest method recurseForDependencies.

@SuppressWarnings("rawtypes")
private Set<String> recurseForDependencies(Injector injector, HasDependencies hasDependencies) {
    Set<String> elements = Sets.newHashSet();
    for (Dependency<?> dependency : hasDependencies.getDependencies()) {
        Binding<?> binding = injector.getBinding(dependency.getKey());
        HasDependencies deps = (HasDependencies) binding;
        if (binding instanceof InstanceBinding) {
            elements.add((String) ((InstanceBinding) binding).getInstance());
        } else {
            elements.addAll(recurseForDependencies(injector, deps));
        }
    }
    return elements;
}

Example 5 with InstanceBinding

use of com.google.inject.spi.InstanceBinding in project guice by google.

the class InjectorImpl method convertConstantStringBinding.

/**
   * Converts a constant string binding to the required type.
   *
   * @return the binding if it could be resolved, or null if the binding doesn't exist
   * @throws com.google.inject.internal.ErrorsException if there was an error resolving the binding
   */
private <T> BindingImpl<T> convertConstantStringBinding(Key<T> key, Errors errors) throws ErrorsException {
    // Find a constant string binding.
    Key<String> stringKey = key.ofType(STRING_TYPE);
    BindingImpl<String> stringBinding = state.getExplicitBinding(stringKey);
    if (stringBinding == null || !stringBinding.isConstant()) {
        return null;
    }
    // We can't call getProvider().get() because this InstanceBinding may not have been inintialized
    // yet (because we may have been called during InternalInjectorCreator.initializeStatically and
    // instance binding validation hasn't happened yet.)
    @SuppressWarnings("unchecked") String stringValue = ((InstanceBinding<String>) stringBinding).getInstance();
    Object source = stringBinding.getSource();
    // Find a matching type converter.
    TypeLiteral<T> type = key.getTypeLiteral();
    TypeConverterBinding typeConverterBinding = state.getConverter(stringValue, type, errors, source);
    if (typeConverterBinding == null) {
        // No converter can handle the given type.
        return null;
    }
    // Try to convert the string. A failed conversion results in an error.
    try {
        // This cast is safe because we double check below.
        @SuppressWarnings("unchecked") T converted = (T) typeConverterBinding.getTypeConverter().convert(stringValue, type);
        if (converted == null) {
            throw errors.converterReturnedNull(stringValue, source, type, typeConverterBinding).toException();
        }
        if (!type.getRawType().isInstance(converted)) {
            throw errors.conversionTypeError(stringValue, source, type, typeConverterBinding, converted).toException();
        }
        return new ConvertedConstantBindingImpl<T>(this, key, converted, stringBinding, typeConverterBinding);
    } catch (ErrorsException e) {
        throw e;
    } catch (RuntimeException e) {
        throw errors.conversionError(stringValue, source, type, typeConverterBinding, e).toException();
    }
}