| /* |
| * Copyright (C) 2017 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.internal; |
| |
| import static dagger.internal.DaggerCollections.newLinkedHashMapWithExpectedSize; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| |
| /** |
| * A fluent builder class that returns a {@link Map}. Used in component implementations where a map |
| * must be created in one fluent statement for inlined request fulfillments. |
| */ |
| public final class MapBuilder<K, V> { |
| private final Map<K, V> contributions; |
| |
| private MapBuilder(int size) { |
| contributions = newLinkedHashMapWithExpectedSize(size); |
| } |
| |
| /** |
| * Creates a new {@link MapBuilder} with {@code size} elements. |
| */ |
| public static <K, V> MapBuilder<K, V> newMapBuilder(int size) { |
| return new MapBuilder<>(size); |
| } |
| |
| public MapBuilder<K, V> put(K key, V value) { |
| contributions.put(key, value); |
| return this; |
| } |
| |
| public MapBuilder<K, V> putAll(Map<K, V> map) { |
| contributions.putAll(map); |
| return this; |
| } |
| |
| public Map<K, V> build() { |
| if (contributions.isEmpty()) { |
| return Collections.emptyMap(); |
| } |
| return Collections.unmodifiableMap(contributions); |
| } |
| } |