1/**
2 * Copyright (C) 2006 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.google.inject.internal;
18
19import static com.google.common.base.Preconditions.checkNotNull;
20
21import com.google.inject.Key;
22import com.google.inject.internal.InjectorImpl.JitLimitation;
23import com.google.inject.spi.Dependency;
24
25import javax.inject.Provider;
26
27/**
28 * Delegates to a custom factory which is also bound in the injector.
29 */
30final class BoundProviderFactory<T> extends ProviderInternalFactory<T> implements CreationListener {
31
32  private final ProvisionListenerStackCallback<T> provisionCallback;
33  private final InjectorImpl injector;
34  final Key<? extends javax.inject.Provider<? extends T>> providerKey;
35  private InternalFactory<? extends javax.inject.Provider<? extends T>> providerFactory;
36
37  BoundProviderFactory(
38      InjectorImpl injector,
39      Key<? extends javax.inject.Provider<? extends T>> providerKey,
40      Object source,
41      ProvisionListenerStackCallback<T> provisionCallback) {
42    super(source);
43    this.provisionCallback = checkNotNull(provisionCallback, "provisionCallback");
44    this.injector = injector;
45    this.providerKey = providerKey;
46  }
47
48  public void notify(Errors errors) {
49    try {
50      providerFactory = injector.getInternalFactory(providerKey, errors.withSource(source), JitLimitation.NEW_OR_EXISTING_JIT);
51    } catch (ErrorsException e) {
52      errors.merge(e.getErrors());
53    }
54  }
55
56  public T get(Errors errors, InternalContext context, Dependency<?> dependency, boolean linked)
57      throws ErrorsException {
58    context.pushState(providerKey, source);
59    try {
60      errors = errors.withSource(providerKey);
61      javax.inject.Provider<? extends T> provider = providerFactory.get(errors, context, dependency, true);
62      return circularGet(provider, errors, context, dependency, provisionCallback);
63    } finally {
64      context.popState();
65    }
66  }
67
68  @Override
69  protected T provision(Provider<? extends T> provider, Errors errors, Dependency<?> dependency,
70      ConstructionContext<T> constructionContext) throws ErrorsException {
71    try {
72      return super.provision(provider, errors, dependency, constructionContext);
73    } catch(RuntimeException userException) {
74      throw errors.errorInProvider(userException).toException();
75    }
76  }
77
78  @Override public String toString() {
79    return providerKey.toString();
80  }
81}
82