1/**
2 * Copyright (C) 2011 Google Inc.
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
17package com.google.inject.grapher;
18
19import com.google.common.collect.Lists;
20import com.google.inject.Binding;
21import com.google.inject.spi.ProviderBinding;
22import java.util.List;
23
24/**
25 * Alias creator that creates an alias for each {@link ProviderBinding}. These {@link Binding}s
26 * arise from an {@link InjectionPoint} for the {@link Provider} interface. Since this isn't
27 * very interesting information, we don't render this binding on the graph, and just alias the two
28 * nodes.
29 *
30 * @author bojand@google.com (Bojan Djordjevic)
31 */
32final class ProviderAliasCreator implements AliasCreator {
33  @Override public Iterable<Alias> createAliases(Iterable<Binding<?>> bindings) {
34    List<Alias> aliases = Lists.newArrayList();
35    for (Binding<?> binding : bindings) {
36      if (binding instanceof ProviderBinding) {
37        aliases.add(new Alias(NodeId.newTypeId(binding.getKey()),
38            NodeId.newTypeId(((ProviderBinding<?>) binding).getProvidedKey())));
39      }
40    }
41    return aliases;
42  }
43}
44