1 /* 2 * Copyright (C) 2015 DroidDriver committers 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 io.appium.droiddriver.helpers; 18 19 import io.appium.droiddriver.DroidDriver; 20 import io.appium.droiddriver.exceptions.UnrecoverableException; 21 22 /** 23 * Calls {@link DroidDrivers#setSingleton} once and only once. 24 */ 25 public class DroidDriversInitializer extends SingleRun { 26 private static DroidDriversInitializer instance; 27 private final DroidDriver driver; 28 29 private DroidDriversInitializer(DroidDriver driver) { 30 this.driver = driver; 31 } 32 33 @Override 34 protected void run() { 35 DroidDrivers.setSingleton(driver); 36 } 37 38 public static synchronized DroidDriversInitializer get(DroidDriver driver) { 39 if (instance == null) { 40 instance = new DroidDriversInitializer(driver); 41 } 42 43 if (instance.driver != driver) { 44 throw new UnrecoverableException("The singleton DroidDriversInitializer has already been" + 45 " created with a different driver"); 46 } 47 return instance; 48 } 49 } 50
