| /* |
| * Copyright (C) 2011 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.internal; |
| |
| import static com.google.inject.internal.util.Preconditions.checkState; |
| |
| import com.google.inject.Key; |
| import com.google.inject.ProvidedBy; |
| import com.google.inject.Provider; |
| import com.google.inject.internal.InjectorImpl.JitLimitation; |
| import com.google.inject.spi.Dependency; |
| |
| /** |
| * An {@link InternalFactory} for {@literal @}{@link ProvidedBy} bindings. |
| * |
| * @author sameb@google.com (Sam Berlin) |
| */ |
| class ProvidedByInternalFactory<T> extends ProviderInternalFactory<T> |
| implements DelayedInitialize { |
| |
| private final Class<?> rawType; |
| private final Class<? extends Provider<?>> providerType; |
| private final Key<? extends Provider<T>> providerKey; |
| private BindingImpl<? extends Provider<T>> providerBinding; |
| |
| ProvidedByInternalFactory( |
| Class<?> rawType, |
| Class<? extends Provider<?>> providerType, |
| Key<? extends Provider<T>> providerKey, |
| boolean allowProxy, |
| ProvisionListenerStackCallback<T> provisionCallback) { |
| super(providerKey, allowProxy, provisionCallback); |
| this.rawType = rawType; |
| this.providerType = providerType; |
| this.providerKey = providerKey; |
| } |
| |
| public void initialize(InjectorImpl injector, Errors errors) throws ErrorsException { |
| providerBinding = |
| injector.getBindingOrThrow(providerKey, errors, JitLimitation.NEW_OR_EXISTING_JIT); |
| } |
| |
| @SuppressWarnings("unchecked")// |
| public T get(Errors errors, InternalContext context, Dependency dependency, boolean linked) |
| throws ErrorsException { |
| checkState(providerBinding != null, "not initialized"); |
| |
| context.pushState(providerKey, providerBinding.getSource()); |
| try { |
| errors = errors.withSource(providerKey); |
| Provider provider = providerBinding.getInternalFactory().get( |
| errors, context, dependency, true); |
| return circularGet(provider, errors, context, dependency, linked); |
| } finally { |
| context.popState(); |
| } |
| } |
| |
| protected T provision(javax.inject.Provider<? extends T> provider, Errors errors, |
| Dependency<?> dependency, ConstructionContext<T> constructionContext) |
| throws ErrorsException { |
| try { |
| Object o = super.provision(provider, errors, dependency, constructionContext); |
| if (o != null && !rawType.isInstance(o)) { |
| throw errors.subtypeNotProvided(providerType, rawType).toException(); |
| } |
| @SuppressWarnings("unchecked") // protected by isInstance() check above |
| T t = (T) o; |
| return t; |
| } catch (RuntimeException e) { |
| throw errors.errorInProvider(e).toException(); |
| } |
| } |
| } |