1 /* 2 * Copyright (C) 2015 The Android Open Source Project 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 package tests.util; 17 /** 18 * Runner which executes the provided code under test (via a callback) for each provided input 19 * value. 20 */ 21 public final class ForEachRunner { 22 /** 23 * Callback parameterized with a value. 24 */ 25 public interface Callback<T> { 26 /** 27 * Invokes the callback for the provided value. 28 */ run(T value)29 void run(T value) throws Exception; 30 } ForEachRunner()31 private ForEachRunner() {} 32 /** 33 * Invokes the provided callback for each of the provided named values. 34 * 35 * @param namesAndValues named values represented as name-value pairs. 36 * 37 * @param <T> type of value. 38 */ runNamed(Callback<T> callback, Iterable<Pair<String, T>> namesAndValues)39 public static <T> void runNamed(Callback<T> callback, Iterable<Pair<String, T>> namesAndValues) 40 throws Exception { 41 for (Pair<String, T> nameAndValue : namesAndValues) { 42 try { 43 callback.run(nameAndValue.getSecond()); 44 } catch (Throwable e) { 45 throw new Exception("Failed for " + nameAndValue.getFirst() + ": " + e.getMessage(), e); 46 } 47 } 48 } 49 } 50