| /** |
| * Copyright (C) 2006 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.inject; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.inject.util.Modules; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import junit.framework.TestCase; |
| |
| /** |
| * @author crazybob@google.com (Bob Lee) |
| */ |
| public class GenericInjectionTest extends TestCase { |
| |
| public void testGenericInjection() throws CreationException { |
| final List<String> names = Arrays.asList("foo", "bar", "bob"); |
| |
| Injector injector = Guice.createInjector((Module) new AbstractModule() { |
| protected void configure() { |
| bind(new TypeLiteral<List<String>>() {}).toInstance(names); |
| } |
| }); |
| |
| Foo foo = injector.getInstance(Foo.class); |
| assertEquals(names, foo.names); |
| } |
| |
| static class Foo { |
| @Inject List<String> names; |
| } |
| |
| /** |
| * Although we may not have intended to support this behaviour, this test |
| * passes under Guice 1.0. The workaround is to add an explicit binding for |
| * the parameterized type. See {@link #testExplicitBindingOfGenericType()}. |
| */ |
| public void testImplicitBindingOfGenericType() { |
| Parameterized<String> parameterized |
| = Guice.createInjector().getInstance(Key.get(new TypeLiteral<Parameterized<String>>() {})); |
| assertNotNull(parameterized); |
| } |
| |
| public void testExplicitBindingOfGenericType() { |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(Key.get(new TypeLiteral<Parameterized<String>>() {})) |
| .to((Class) Parameterized.class); |
| } |
| }); |
| |
| Parameterized<String> parameterized |
| = injector.getInstance(Key.get(new TypeLiteral<Parameterized<String>>() { })); |
| assertNotNull(parameterized); |
| } |
| |
| static class Parameterized<T> { |
| @Inject |
| Parameterized() { } |
| } |
| |
| public void testInjectingParameterizedDependenciesForImplicitBinding() { |
| assertParameterizedDepsInjected(new Key<ParameterizedDeps<String, Integer>>() {}, |
| Modules.EMPTY_MODULE); |
| } |
| |
| public void testInjectingParameterizedDependenciesForBindingTarget() { |
| final TypeLiteral<ParameterizedDeps<String, Integer>> type |
| = new TypeLiteral<ParameterizedDeps<String, Integer>>() {}; |
| |
| assertParameterizedDepsInjected(Key.get(Object.class), new AbstractModule() { |
| protected void configure() { |
| bind(Object.class).to(type); |
| } |
| }); |
| } |
| |
| public void testInjectingParameterizedDependenciesForBindingSource() { |
| final TypeLiteral<ParameterizedDeps<String, Integer>> type |
| = new TypeLiteral<ParameterizedDeps<String, Integer>>() {}; |
| |
| assertParameterizedDepsInjected(Key.get(type), new AbstractModule() { |
| protected void configure() { |
| bind(type); |
| } |
| }); |
| } |
| |
| public void testBindingToSubtype() { |
| final TypeLiteral<ParameterizedDeps<String, Integer>> type |
| = new TypeLiteral<ParameterizedDeps<String, Integer>>() {}; |
| |
| assertParameterizedDepsInjected(Key.get(type), new AbstractModule() { |
| protected void configure() { |
| bind(type).to(new TypeLiteral<SubParameterizedDeps<String, Long, Integer>>() {}); |
| } |
| }); |
| } |
| |
| public void testBindingSubtype() { |
| final TypeLiteral<SubParameterizedDeps<String, Long, Integer>> type |
| = new TypeLiteral<SubParameterizedDeps<String, Long, Integer>>() {}; |
| |
| assertParameterizedDepsInjected(Key.get(type), new AbstractModule() { |
| protected void configure() { |
| bind(type); |
| } |
| }); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public void assertParameterizedDepsInjected(Key<?> key, Module bindingModule) { |
| Module bindDataModule = new AbstractModule() { |
| protected void configure() {} |
| @Provides Map<String, Integer> provideMap() { |
| return ImmutableMap.of("one", 1, "two", 2); |
| } |
| @Provides Set<String> provideSet(Map<String, Integer> map) { |
| return map.keySet(); |
| } |
| @Provides Collection<Integer> provideCollection(Map<String, Integer> map) { |
| return map.values(); |
| } |
| }; |
| |
| Injector injector = Guice.createInjector(bindDataModule, bindingModule); |
| ParameterizedDeps<String, Integer> parameterizedDeps |
| = (ParameterizedDeps<String, Integer>) injector.getInstance(key); |
| assertEquals(ImmutableMap.of("one", 1, "two", 2), parameterizedDeps.map); |
| assertEquals(ImmutableSet.of("one", "two"), parameterizedDeps.keys); |
| assertEquals(ImmutableSet.of(1, 2), ImmutableSet.copyOf(parameterizedDeps.values)); |
| } |
| |
| static class SubParameterizedDeps<A, B, C> extends ParameterizedDeps<A, C> { |
| @Inject SubParameterizedDeps(Set<A> keys) { |
| super(keys); |
| } |
| } |
| |
| static class ParameterizedDeps<K, V> { |
| @Inject private Map<K, V> map; |
| private Set<K> keys; |
| private Collection<V> values; |
| |
| @Inject ParameterizedDeps(Set<K> keys) { |
| this.keys = keys; |
| } |
| |
| @Inject void method(Collection<V> values) { |
| this.values = values; |
| } |
| } |
| |
| public void testImmediateTypeVariablesAreInjected() { |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bind(String.class).toInstance("tee"); |
| } |
| }); |
| InjectsT<String> injectsT = injector.getInstance(new Key<InjectsT<String>>() {}); |
| assertEquals("tee", injectsT.t); |
| } |
| |
| static class InjectsT<T> { |
| @Inject T t; |
| } |
| } |