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      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 
     18 package com.google.inject.multibindings;
     19 
     20 import static java.lang.annotation.RetentionPolicy.RUNTIME;
     21 
     22 import com.google.inject.BindingAnnotation;
     23 
     24 import java.lang.annotation.Retention;
     25 
     26 /**
     27  * An internal binding annotation applied to each element in a multibinding.
     28  * All elements are assigned a globally-unique id to allow different modules
     29  * to contribute multibindings independently.
     30  *
     31  * @author jessewilson (at) google.com (Jesse Wilson)
     32  */
     33 @Retention(RUNTIME) @BindingAnnotation
     34 @interface Element {
     35 
     36   enum Type {
     37     MAPBINDER,
     38     MULTIBINDER,
     39     OPTIONALBINDER;
     40   }
     41 
     42   String setName();
     43   int uniqueId();
     44   Type type();
     45   String keyType();
     46 }
     47