1/*
2 * Copyright (C) 2015 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.caliper.runner;
18
19import com.google.caliper.platform.Platform;
20import com.google.caliper.platform.dalvik.DalvikModule;
21import com.google.caliper.platform.dalvik.DalvikPlatform;
22import com.google.caliper.platform.jvm.JvmModule;
23import com.google.caliper.platform.jvm.JvmPlatform;
24import com.google.common.base.Optional;
25
26import dagger.Module;
27import dagger.Provides;
28
29import javax.inject.Provider;
30
31/**
32 * Provider of a {@link Platform} instance appropriate for the current platform.
33 */
34@Module(includes = {JvmModule.class, DalvikModule.class})
35public final class PlatformModule {
36
37  /**
38   * Chooses the {@link DalvikPlatform} if available, otherwise uses the default
39   * {@link JvmPlatform}.
40   */
41  @Provides
42  static Platform providePlatform(
43      Optional<DalvikPlatform> optionalDalvikPlatform,
44      Provider<JvmPlatform> jvmPlatformProvider) {
45    if (optionalDalvikPlatform.isPresent()) {
46      return optionalDalvikPlatform.get();
47    } else {
48      return jvmPlatformProvider.get();
49    }
50  }
51}
52