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      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 
     17 package com.google.caliper.runner;
     18 
     19 import com.google.caliper.options.CaliperOptions;
     20 import com.google.caliper.util.InvalidCommandException;
     21 import com.google.caliper.util.Util;
     22 import dagger.Module;
     23 import dagger.Provides;
     24 import javax.inject.Singleton;
     25 
     26 /**
     27  * Provides bindings to integrate other modules into the {@link MainComponent}.
     28  */
     29 @Module
     30 class 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