1 /* 2 * Copyright (C) 2013 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 com.android.inputmethod.latin.utils; 18 19 import android.content.res.Configuration; 20 import android.content.res.Resources; 21 22 import java.util.Locale; 23 24 public abstract class RunInLocale<T> { 25 private static final Object sLockForRunInLocale = new Object(); 26 job(final Resources res)27 protected abstract T job(final Resources res); 28 29 /** 30 * Execute {@link #job(Resources)} method in specified system locale exclusively. 31 * 32 * @param res the resources to use. 33 * @param newLocale the locale to change to. Run in system locale if null. 34 * @return the value returned from {@link #job(Resources)}. 35 */ runInLocale(final Resources res, final Locale newLocale)36 public T runInLocale(final Resources res, final Locale newLocale) { 37 synchronized (sLockForRunInLocale) { 38 final Configuration conf = res.getConfiguration(); 39 if (newLocale == null || newLocale.equals(conf.locale)) { 40 return job(res); 41 } 42 final Locale savedLocale = conf.locale; 43 try { 44 conf.locale = newLocale; 45 res.updateConfiguration(conf, null); 46 return job(res); 47 } finally { 48 conf.locale = savedLocale; 49 res.updateConfiguration(conf, null); 50 } 51 } 52 } 53 } 54