72 lines
2.2 KiB
Java
72 lines
2.2 KiB
Java
/*
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* Copyright (C) 2014 The Dagger Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dagger.internal;
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import dagger.Lazy;
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import java.util.Map;
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import javax.inject.Provider;
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/**
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* A {@link Factory} implementation used to implement {@link Map} bindings. This factory returns a
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* {@code Map<K, Provider<V>>} when calling {@link #get} (as specified by {@link Factory}).
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*/
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public final class MapProviderFactory<K, V> extends AbstractMapFactory<K, V, Provider<V>>
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implements Lazy<Map<K, Provider<V>>> {
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/** Returns a new {@link Builder} */
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public static <K, V> Builder<K, V> builder(int size) {
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return new Builder<>(size);
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}
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private MapProviderFactory(Map<K, Provider<V>> contributingMap) {
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super(contributingMap);
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}
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/**
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* Returns a {@code Map<K, Provider<V>>} whose iteration order is that of the elements given by
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* each of the providers, which are invoked in the order given at creation.
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*/
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@Override
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public Map<K, Provider<V>> get() {
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return contributingMap();
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}
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/** A builder for {@link MapProviderFactory}. */
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public static final class Builder<K, V> extends AbstractMapFactory.Builder<K, V, Provider<V>> {
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private Builder(int size) {
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super(size);
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}
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@Override
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public Builder<K, V> put(K key, Provider<V> providerOfValue) {
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super.put(key, providerOfValue);
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return this;
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}
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@Override
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public Builder<K, V> putAll(Provider<Map<K, Provider<V>>> mapProviderFactory) {
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super.putAll(mapProviderFactory);
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return this;
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}
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/** Returns a new {@link MapProviderFactory}. */
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public MapProviderFactory<K, V> build() {
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return new MapProviderFactory<>(map);
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}
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}
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}
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