| /** |
| * Copyright (C) 2008 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.inject.internal.Errors; |
| import com.google.inject.spi.InjectionPoint; |
| import com.google.inject.internal.ResolveFailedException; |
| import com.google.inject.internal.ToStringBuilder; |
| import com.google.inject.spi.SourceProviders; |
| import java.util.concurrent.Callable; |
| |
| /** |
| * A placeholder which enables us to swap in the real factory once the |
| * container is created. |
| */ |
| class FactoryProxy<T> implements InternalFactory<T>, BindCommandProcessor.CreationListener { |
| |
| private final Key<T> key; |
| private final Key<? extends T> targetKey; |
| private final Object source; |
| |
| private InternalFactory<? extends T> targetFactory; |
| |
| FactoryProxy(Key<T> key, Key<? extends T> targetKey, Object source) { |
| this.key = key; |
| this.targetKey = targetKey; |
| this.source = source; |
| } |
| |
| public void notify(final InjectorImpl injector, final Errors errors) { |
| try { |
| SourceProviders.withDefaultChecked(source, new Callable<Void>() { |
| public Void call() throws ResolveFailedException { |
| targetFactory = injector.getInternalFactory(targetKey, errors); |
| return null; |
| } |
| }); |
| } |
| catch (RuntimeException e) { |
| throw e; |
| } |
| catch (ResolveFailedException e) { |
| errors.merge(e.getErrors()); |
| } |
| catch (Exception e) { |
| throw new AssertionError(); |
| } |
| } |
| |
| public T get(Errors errors, InternalContext context, InjectionPoint<?> injectionPoint) |
| throws ResolveFailedException { |
| return targetFactory.get(errors, context, injectionPoint); |
| } |
| |
| public String toString() { |
| return new ToStringBuilder(FactoryProxy.class) |
| .add("key", key) |
| .add("provider", targetFactory) |
| .toString(); |
| } |
| } |