IntoMap.java

/*
 * Copyright (C) 2016 The Dagger Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package dagger.multibindings;

import dagger.internal.Beta;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * The method's return type forms the type argument for the value of a
 * {@code Map<K, Provider<V>>}, and the combination of the annotated key and the returned value
 * is contributed to the map as a key/value pair. The {@code Map<K, Provider<V>>} produced from
 * the accumulation of values will be immutable.
 *
 * @see <a href="http://google.github.io/dagger/multibindings#map-multibindings">Map
 * multibinding</a>
 */
@Documented
@Target(METHOD)
@Retention(RUNTIME)
@Beta
public @interface IntoMap {
}