1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/*
* 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.producers.internal;
import static com.google.common.base.Preconditions.checkNotNull;
import static dagger.producers.internal.Producers.producerFromProvider;
import com.google.common.collect.ImmutableMap;
import dagger.producers.Producer;
import java.util.Map;
import javax.inject.Provider;
/**
* An {@code abstract} {@link Producer} implementation used to implement {@link Map} bindings.
*
* @param <K>The key type of the map that this produces
* @param <V>The type that each contributing producer
* @param <V2>The value type of the map that this produces. For {@link MapProducer}, {@code V} and
* {@code V2} will be equivalent.
*/
abstract class AbstractMapProducer<K, V, V2> extends AbstractProducer<Map<K, V2>> {
private final ImmutableMap<K, Producer<V>> contributingMap;
AbstractMapProducer(ImmutableMap<K, Producer<V>> contributingMap) {
this.contributingMap = contributingMap;
}
/** The map of {@link Producer}s that contribute to this map binding. */
final ImmutableMap<K, Producer<V>> contributingMap() {
return contributingMap;
}
/** A builder for {@link AbstractMapProducer} */
public abstract static class Builder<K, V, V2> {
final ImmutableMap.Builder<K, Producer<V>> mapBuilder;
Builder(int size) {
mapBuilder = ImmutableMap.builderWithExpectedSize(size);
}
// Unfortunately, we cannot return a self-type here because a raw Producer type passed to one of
// these methods affects the returned type of the method. The first put*() call erases the self
// type to the "raw" self type, and the second erases the type to the upper bound
// (AbstractMapProducer.Builder), which doesn't have a build() method.
//
// The methods are therefore not declared public so that each subtype will redeclare them and
// expand their accessibility
/** Associates {@code key} with {@code producerOfValue}. */
Builder<K, V, V2> put(K key, Producer<V> producerOfValue) {
checkNotNull(key, "key");
checkNotNull(producerOfValue, "producer of value");
mapBuilder.put(key, producerOfValue);
return this;
}
/** Associates {@code key} with {@code providerOfValue}. */
Builder<K, V, V2> put(K key, Provider<V> providerOfValue) {
checkNotNull(key, "key");
checkNotNull(providerOfValue, "provider of value");
mapBuilder.put(key, producerFromProvider(providerOfValue));
return this;
}
/** Adds contributions from a super-implementation of a component into this builder. */
Builder<K, V, V2> putAll(Producer<Map<K, V2>> mapOfProducers) {
if (mapOfProducers instanceof DelegateProducer) {
@SuppressWarnings("unchecked")
DelegateProducer<Map<K, V2>> asDelegateProducer = (DelegateProducer) mapOfProducers;
return putAll(asDelegateProducer.getDelegate());
}
@SuppressWarnings("unchecked")
AbstractMapProducer<K, V, ?> asAbstractMapProducer =
((AbstractMapProducer<K, V, ?>) (Producer) mapOfProducers);
mapBuilder.putAll(asAbstractMapProducer.contributingMap);
return this;
}
}
}
|
