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      1 /**
      2  * Copyright (C) 2010 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 static java.lang.annotation.ElementType.METHOD;
     20 import static java.lang.annotation.RetentionPolicy.RUNTIME;
     21 
     22 import com.google.inject.Injector;
     23 import com.google.inject.Stage;
     24 
     25 import java.lang.annotation.Documented;
     26 import java.lang.annotation.Retention;
     27 import java.lang.annotation.Target;
     28 
     29 /**
     30  * Instructs an {@link Injector} running in {@link Stage#TOOL} that a method should be injected.
     31  * This is typically useful for for extensions to Guice that perform additional validation in an
     32  * injected method or field.  This only applies to objects that are already constructed when
     33  * bindings are created (ie., something bound using {@link
     34  * com.google.inject.binder.LinkedBindingBuilder#toProvider toProvider}, {@link
     35  * com.google.inject.binder.LinkedBindingBuilder#toInstance toInstance}, or {@link
     36  * com.google.inject.Binder#requestInjection requestInjection}.
     37  *
     38  * @author sberlin (at) gmail.com (Sam Berlin)
     39  * @since 3.0
     40  */
     41 @Target({ METHOD })
     42 @Retention(RUNTIME)
     43 @Documented
     44 public @interface Toolable {
     45 }
     46