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 
17 package com.google.inject.grapher;
18 
19 import com.google.common.collect.Lists;
20 import com.google.inject.Binding;
21 import com.google.inject.spi.ProviderBinding;
22 import 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  */
32 final class ProviderAliasCreator implements AliasCreator {
createAliases(Iterable<Binding<?>> bindings)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