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 
17 package com.google.inject.spi;
18 
19 import com.google.inject.Binding;
20 import com.google.inject.Key;
21 import com.google.inject.Provider;
22 
23 /**
24  * A binding to a {@link Provider} that delegates to the binding for the provided type. This binding
25  * is used whenever a {@code Provider<T>} is injected (as opposed to injecting {@code T} directly).
26  *
27  * @author jessewilson@google.com (Jesse Wilson)
28  * @since 2.0
29  */
30 public interface ProviderBinding<T extends Provider<?>> extends Binding<T> {
31 
32   /**
33    * Returns the key whose binding is used to {@link Provider#get provide instances}. That binding
34    * can be retrieved from an injector using {@link com.google.inject.Injector#getBinding(Key)
35    * Injector.getBinding(providedKey)}
36    */
getProvidedKey()37   Key<?> getProvidedKey();
38 }
39