1/**
2 * Copyright (C) 2008 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 com.google.inject.MembersInjector;
20import com.google.inject.Provider;
21import com.google.inject.spi.MembersInjectorLookup;
22import com.google.inject.spi.ProviderLookup;
23
24/**
25 * Handles {@code Binder.getProvider} and {@code Binder.getMembersInjector(TypeLiteral)} commands.
26 *
27 * @author crazybob@google.com (Bob Lee)
28 * @author jessewilson@google.com (Jesse Wilson)
29 */
30final class LookupProcessor extends AbstractProcessor {
31
32  LookupProcessor(Errors errors) {
33    super(errors);
34  }
35
36  @Override public <T> Boolean visit(MembersInjectorLookup<T> lookup) {
37    try {
38      MembersInjector<T> membersInjector
39          = injector.membersInjectorStore.get(lookup.getType(), errors);
40      lookup.initializeDelegate(membersInjector);
41    } catch (ErrorsException e) {
42      errors.merge(e.getErrors()); // TODO: source
43    }
44
45    return true;
46  }
47
48  @Override public <T> Boolean visit(ProviderLookup<T> lookup) {
49    // ensure the provider can be created
50    try {
51      Provider<T> provider = injector.getProviderOrThrow(lookup.getDependency(), errors);
52      lookup.initializeDelegate(provider);
53    } catch (ErrorsException e) {
54      errors.merge(e.getErrors()); // TODO: source
55    }
56
57    return true;
58  }
59}
60