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.options.CaliperOptions;
20import com.google.caliper.util.InvalidCommandException;
21import com.google.caliper.util.Util;
22import dagger.Module;
23import dagger.Provides;
24import javax.inject.Singleton;
25
26/**
27 * Provides bindings to integrate other modules into the {@link MainComponent}.
28 */
29@Module
30class MainModule {
31
32  private static Class<?> benchmarkClassForName(String className)
33      throws InvalidCommandException, UserCodeException {
34    try {
35      return Util.lenientClassForName(className);
36    } catch (ClassNotFoundException e) {
37      throw new InvalidCommandException("Benchmark class not found: " + className);
38    } catch (ExceptionInInitializerError e) {
39      throw new UserCodeException(
40          "Exception thrown while initializing class '" + className + "'", e.getCause());
41    } catch (NoClassDefFoundError e) {
42      throw new UserCodeException("Unable to load " + className, e);
43    }
44  }
45
46  @Provides
47  @Singleton
48  @Running.BenchmarkClass
49  static Class<?> provideBenchmarkClass(CaliperOptions options) {
50    return benchmarkClassForName(options.benchmarkClassName());
51  }
52}
53