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 libcore.icu; 18 19 import android.icu.text.DateFormat; 20 import android.icu.text.DateTimePatternGenerator; 21 import android.icu.text.DisplayContext; 22 import android.icu.text.SimpleDateFormat; 23 import android.icu.util.Calendar; 24 import android.icu.util.ULocale; 25 26 import libcore.util.BasicLruCache; 27 28 /** 29 * A formatter that outputs a single date/time. 30 */ 31 public class DateTimeFormat { 32 private static final FormatterCache CACHED_FORMATTERS = new FormatterCache(); 33 34 static class FormatterCache extends BasicLruCache<String, DateFormat> { 35 FormatterCache() { 36 super(8); 37 } 38 } 39 40 private DateTimeFormat() { 41 } 42 43 public static String format(ULocale icuLocale, Calendar time, int flags, 44 DisplayContext displayContext) { 45 String skeleton = DateUtilsBridge.toSkeleton(time, flags); 46 String key = skeleton + "\t" + icuLocale + "\t" + time.getTimeZone(); 47 synchronized(CACHED_FORMATTERS) { 48 DateFormat formatter = CACHED_FORMATTERS.get(key); 49 if (formatter == null) { 50 DateTimePatternGenerator generator = DateTimePatternGenerator.getInstance(icuLocale); 51 formatter = new SimpleDateFormat(generator.getBestPattern(skeleton), icuLocale); 52 CACHED_FORMATTERS.put(key, formatter); 53 } 54 formatter.setContext(displayContext); 55 return formatter.format(time); 56 } 57 } 58 } 59
