Jesse Wilson | 109c128 | 2009-12-08 13:45:25 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2009 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; |
| 18 | |
| 19 | import java.lang.reflect.Constructor; |
| 20 | import java.lang.reflect.Type; |
| 21 | import java.util.*; |
| 22 | |
| 23 | /** |
| 24 | * A convenience class for implementing benchmark suites in plain code. |
| 25 | * Implementing classes must have a no-arguments constructor. |
| 26 | * |
| 27 | * <h3>Benchmarks</h3> |
| 28 | * The benchmarks of a suite are defined by inner classes within the suite. |
| 29 | * These inner classes implement the {@link Benchmark} interface. They may be |
| 30 | * static. They are not permitted to take parameters in their constructors. |
| 31 | * |
| 32 | * <h3>Parameters</h3> |
| 33 | * Implementing classes may be configured using parameters. Each parameter is a |
| 34 | * property of a benchmark, plus the default values that fulfill it. Parameters |
| 35 | * are specified by annotated fields: |
| 36 | * <pre> |
| 37 | * {@literal @}Param int length; |
| 38 | * </pre> |
| 39 | * The available values for a parameter are specified by another field with the |
| 40 | * same name plus the {@code Values} suffix. The type of this field must be an |
| 41 | * {@code Iterable} of the parameter's type. |
| 42 | * <pre> |
| 43 | * Iterable<Integer> lengthValues = Arrays.asList(10, 100, 1000, 10000); |
| 44 | * </pre> |
| 45 | * Alternatively, the available values may be specified with a method. The |
| 46 | * method's name follows the same naming convention and returns the same type. |
| 47 | * Such methods may not accept parameters of their own. |
| 48 | * <pre> |
| 49 | * Iterable<Integer> lengthValues() { |
| 50 | * return Arrays.asList(10, 100, 1000, 10000); |
| 51 | * } |
| 52 | * </pre> |
| 53 | */ |
| 54 | public abstract class DefaultBenchmarkSuite extends BenchmarkSuite { |
| 55 | |
| 56 | private final Map<String, Parameter<?>> parameters; |
| 57 | private final Map<Class<? extends Benchmark>, BenchmarkFactory> benchmarkFactories; |
| 58 | |
| 59 | protected void setUp() throws Exception {} |
| 60 | |
| 61 | protected DefaultBenchmarkSuite() { |
| 62 | parameters = Parameter.forClass(getClass()); |
| 63 | benchmarkFactories = createBenchmarkFactories(); |
| 64 | |
| 65 | if (benchmarkFactories.isEmpty()) { |
| 66 | throw new ConfigurationException( |
| 67 | "No benchmarks defined in " + getClass().getName()); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | protected Set<Class<? extends Benchmark>> benchmarkClasses() { |
| 72 | return benchmarkFactories.keySet(); |
| 73 | } |
| 74 | |
| 75 | protected Set<String> parameterNames() { |
| 76 | return parameters.keySet(); |
| 77 | } |
| 78 | |
| 79 | protected Set<String> parameterValues(String parameterName) { |
| 80 | try { |
| 81 | TypeConverter typeConverter = new TypeConverter(); |
| 82 | Parameter<?> parameter = parameters.get(parameterName); |
| 83 | if (parameter == null) { |
| 84 | throw new IllegalArgumentException(); |
| 85 | } |
| 86 | Collection<?> values = parameter.values(); |
| 87 | Type type = parameter.getType(); |
| 88 | Set<String> result = new LinkedHashSet<String>(); |
| 89 | for (Object value : values) { |
| 90 | result.add(typeConverter.toString(value, type)); |
| 91 | } |
| 92 | return result; |
| 93 | } catch (Exception e) { |
| 94 | throw new ExecutionException(e); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | protected Benchmark createBenchmark(Class<? extends Benchmark> benchmarkClass, |
| 99 | Map<String, String> parameterValues) { |
| 100 | TypeConverter typeConverter = new TypeConverter(); |
| 101 | |
| 102 | BenchmarkFactory benchmarkFactory = benchmarkFactories.get(benchmarkClass); |
| 103 | if (benchmarkFactory == null) { |
| 104 | throw new IllegalArgumentException(); |
| 105 | } |
| 106 | |
| 107 | if (!parameters.keySet().equals(parameterValues.keySet())) { |
| 108 | throw new IllegalArgumentException("Invalid parameters specified. Expected " |
| 109 | + parameters.keySet() + " but was " + parameterValues.keySet()); |
| 110 | } |
| 111 | |
| 112 | try { |
| 113 | DefaultBenchmarkSuite copyOfSelf = getClass().newInstance(); |
| 114 | Benchmark benchmark = benchmarkFactory.create(copyOfSelf); |
| 115 | for (Map.Entry<String, String> entry : parameterValues.entrySet()) { |
| 116 | Parameter parameter = parameters.get(entry.getKey()); |
| 117 | Object value = typeConverter.fromString(entry.getValue(), parameter.getType()); |
| 118 | parameter.set(copyOfSelf, value); |
| 119 | } |
| 120 | |
| 121 | copyOfSelf.setUp(); |
| 122 | return benchmark; |
| 123 | |
| 124 | } catch (Exception e) { |
| 125 | throw new ExecutionException(e); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Returns a spec for each benchmark defined in the specified class. The |
| 131 | * returned specs have no parameter values; those must be added separately. |
| 132 | */ |
| 133 | private Map<Class<? extends Benchmark>, BenchmarkFactory> createBenchmarkFactories() { |
| 134 | Map<Class<? extends Benchmark>, BenchmarkFactory> result |
| 135 | = new LinkedHashMap<Class<? extends Benchmark>, BenchmarkFactory>(); |
| 136 | for (Class<?> c : getClass().getDeclaredClasses()) { |
| 137 | if (!Benchmark.class.isAssignableFrom(c) || c.isInterface()) { |
| 138 | continue; |
| 139 | } |
| 140 | |
| 141 | @SuppressWarnings("unchecked") // guarded by isAssignableFrom |
| 142 | Class<? extends Benchmark> benchmarkClass = (Class<? extends Benchmark>) c; |
| 143 | |
| 144 | try { |
| 145 | final Constructor<? extends Benchmark> constructor |
| 146 | = benchmarkClass.getDeclaredConstructor(); |
| 147 | constructor.setAccessible(true); |
| 148 | result.put(benchmarkClass, new BenchmarkFactory() { |
| 149 | public Benchmark create(BenchmarkSuite suite) throws Exception { |
| 150 | return constructor.newInstance(); |
| 151 | } |
| 152 | }); |
| 153 | continue; |
| 154 | } catch (NoSuchMethodException ignored) { |
| 155 | } |
| 156 | |
| 157 | try { |
| 158 | final Constructor<? extends Benchmark> constructor |
| 159 | = benchmarkClass.getDeclaredConstructor(getClass()); |
| 160 | constructor.setAccessible(true); |
| 161 | result.put(benchmarkClass, new BenchmarkFactory() { |
| 162 | public Benchmark create(BenchmarkSuite suite) throws Exception { |
| 163 | return constructor.newInstance(suite); |
| 164 | } |
| 165 | }); |
| 166 | continue; |
| 167 | } catch (NoSuchMethodException ignored) { |
| 168 | } |
| 169 | |
| 170 | throw new ConfigurationException("No usable constructor for " |
| 171 | + benchmarkClass.getName() + "\n Benchmarks may only use no arguments constructors."); |
| 172 | } |
| 173 | |
| 174 | return result; |
| 175 | } |
| 176 | |
| 177 | interface BenchmarkFactory { |
| 178 | Benchmark create(BenchmarkSuite suite) throws Exception; |
| 179 | } |
| 180 | } |