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 17 package tests.util; 18 19 /** 20 * Runner which executes the provided code under test (via a callback) for each provided input 21 * value. 22 */ 23 public final class ForEachRunner { 24 25 /** 26 * Callback parameterized with a value. 27 */ 28 public interface Callback<T> { 29 /** 30 * Invokes the callback for the provided value. 31 */ 32 void run(T value) throws Exception; 33 } 34 35 private ForEachRunner() {} 36 37 /** 38 * Invokes the provided callback for each of the provided named values. 39 * 40 * @param namesAndValues named values represented as name-value pairs. 41 * 42 * @param <T> type of value. 43 */ 44 public static <T> void runNamed(Callback<T> callback, Iterable<Pair<String, T>> namesAndValues) 45 throws Exception { 46 for (Pair<String, T> nameAndValue : namesAndValues) { 47 try { 48 callback.run(nameAndValue.getSecond()); 49 } catch (Throwable e) { 50 throw new Exception("Failed for " + nameAndValue.getFirst() + ": " + e.getMessage(), e); 51 } 52 } 53 } 54 } 55
