01: /**
02: * Copyright (C) 2006 Google Inc.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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: */package com.google.inject;
16:
17: /**
18: * A mapping from a key (type and optional annotation) to a provider of
19: * instances of that type. This interface is part of the {@link Injector}
20: * introspection API and is intended primary for use by tools.
21: *
22: * @author crazybob@google.com (Bob Lee)
23: */
24: public interface Binding<T> {
25:
26: /**
27: * Returns the key for this binding.
28: */
29: Key<T> getKey();
30:
31: /**
32: * Returns an arbitrary object containing information about the "place"
33: * where this binding was configured. Used by Guice in the production of
34: * descriptive error messages.
35: */
36: Object getSource();
37:
38: /**
39: * Returns the provider guice uses to fulfill requests for this binding.
40: */
41: Provider<T> getProvider();
42: }
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