1 /* 2 * Copyright (C) 2016 The Dagger Authors. 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 dagger.multibindings; 18 19 import static java.lang.annotation.ElementType.METHOD; 20 import static java.lang.annotation.RetentionPolicy.RUNTIME; 21 22 import java.lang.annotation.Documented; 23 import java.lang.annotation.Retention; 24 import java.lang.annotation.Target; 25 26 /** 27 * The method's return type is {@code Set<T>} and all values are contributed to the set. The {@code 28 * Set<T>} produced from the accumulation of values will be immutable. An example use is to provide 29 * a default empty set binding, which is otherwise not possible using {@link IntoSet}. 30 * 31 * @see <a href="https://dagger.dev/multibindings#set-multibindings">Set multibinding</a> 32 */ 33 @Documented 34 @Target(METHOD) 35 @Retention(RUNTIME) 36 public @interface ElementsIntoSet {} 37