| /** |
| * 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.inject.BinderImpl.CreationListener; |
| |
| /** |
| * Delegates to a custom factory which is also bound in the injector. |
| */ |
| class BoundProviderFactory<T> |
| implements InternalFactory<T>, CreationListener { |
| |
| final Key<? extends Provider<? extends T>> providerKey; |
| final Object source; |
| private InternalFactory<? extends Provider<? extends T>> providerFactory; |
| |
| BoundProviderFactory( |
| Key<? extends Provider<? extends T>> providerKey, |
| Object source) { |
| this.providerKey = providerKey; |
| this.source = source; |
| } |
| |
| BoundProviderFactory( |
| Key<? extends Provider<? extends T>> providerKey, |
| InternalFactory<? extends Provider<? extends T>> providerFactory, |
| Object source) { |
| this.providerKey = providerKey; |
| this.providerFactory = providerFactory; |
| this.source = source; |
| } |
| |
| public void notify(final InjectorImpl injector) { |
| injector.withDefaultSource(source, new Runnable() { |
| public void run() { |
| providerFactory = injector.getInternalFactory(providerKey); |
| } |
| }); |
| } |
| |
| public String toString() { |
| return providerKey.toString(); |
| } |
| |
| public T get(InternalContext context, InjectionPoint<?> injectionPoint) { |
| Provider<? extends T> provider = providerFactory.get(context, injectionPoint); |
| try { |
| return injectionPoint.checkForNull(provider.get(), source); |
| } catch(ProvisionException e) { |
| throw e; |
| } catch(RuntimeException e) { |
| throw new ProvisionException(e, ErrorMessages.ERROR_IN_PROVIDER); |
| } |
| } |
| } |