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| 1 | /* | ||
| 2 | * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | #warn This file is preprocessed before being compiled | ||
| 27 | |||
| 28 | package sun.util; | ||
| 29 | |||
| 30 | import java.util.Arrays; | ||
| 31 | import java.util.Collection; | ||
| 32 | import java.util.Collections; | ||
| 33 | import java.util.HashSet; | ||
| 34 | import java.util.List; | ||
| 35 | import java.util.Locale; | ||
| 36 | import java.util.ResourceBundle; | ||
| 37 | import java.util.ResourceBundle.Control; | ||
| 38 | |||
| 39 | /** | ||
| 40 | * This is a convenient class for loading some of internal resources faster | ||
| 41 | * if they are built with Resources.gmk defined in J2SE workspace. Also, | ||
| 42 | * they have to be in class file format. | ||
| 43 | * | ||
| 44 | * "LOCALE_LIST" will be replaced at built time by a list of locales we | ||
| 45 | * defined in Defs.gmk. We want to exclude these locales from search to | ||
| 46 | * gain better performance. For example, since we know if the resource | ||
| 47 | * is built with Resources.gmk, they are not going to provide basename_en.class | ||
| 48 | * & basename_en_US.class resources, in that case, continuing searching them | ||
| 49 | * is expensive. By excluding them from the candidate locale list, these | ||
| 50 | * resources won't be searched. | ||
| 51 | * | ||
| 52 | * @since 1.6. | ||
| 53 | */ | ||
| 54 | public class CoreResourceBundleControl extends ResourceBundle.Control { | ||
| 55 | /* the candidate locale list to search */ | ||
| 56 | private final Collection<Locale> excludedJDKLocales; | ||
| 57 | /* singlton instance of the resource bundle control. */ | ||
| 58 | private static CoreResourceBundleControl resourceBundleControlInstance = | ||
| 59 | new CoreResourceBundleControl(); | ||
| 60 | |||
| 61 | protected CoreResourceBundleControl() { | ||
| 62 | excludedJDKLocales = Arrays.asList(#LOCALE_LIST#); | ||
| 63 | } | ||
| 64 | |||
| 65 | /** | ||
| 66 | * This method is to provide a customized ResourceBundle.Control to speed | ||
| 67 | * up the search of resources in JDK. | ||
| 68 | * | ||
| 69 | * @return the instance of resource bundle control. | ||
| 70 | */ | ||
| 71 | public static CoreResourceBundleControl getRBControlInstance() { | ||
| 72 | return resourceBundleControlInstance; | ||
| 73 | } | ||
| 74 | |||
| 75 | /** | ||
| 76 | * This method is to provide a customized ResourceBundle.Control to speed | ||
| 77 | * up the search of resources in JDK, with the bundle's package name check. | ||
| 78 | * | ||
| 79 | * @param bundleName bundle name to check | ||
| 80 | * @return the instance of resource bundle control if the bundle is JDK's, | ||
| 81 | * otherwise returns null. | ||
| 82 | */ | ||
| 83 | public static CoreResourceBundleControl getRBControlInstance(String bundleName) { | ||
| 84 | if (bundleName.startsWith("com.sun.") || | ||
| 85 | bundleName.startsWith("java.") || | ||
| 86 | bundleName.startsWith("javax.") || | ||
| 87 | bundleName.startsWith("sun.")) { | ||
| 88 | return resourceBundleControlInstance; | ||
| 89 | } else { | ||
| 90 | return null; | ||
| 91 | } | ||
| 92 | } | ||
| 93 | |||
| 94 | /** | ||
| 95 | * @returns a list of candidate locales to search from. | ||
| 96 | * @exception NullPointerException if baseName or locale is null. | ||
| 97 | */ | ||
| 98 | @Override | ||
| 99 | public List<Locale> getCandidateLocales(String baseName, Locale locale) { | ||
| 100 | List<Locale> candidates = super.getCandidateLocales(baseName, locale); | ||
| 101 | candidates.removeAll(excludedJDKLocales); | ||
| 102 | return candidates; | ||
| 103 | } | ||
| 104 | |||
| 105 | /** | ||
| 106 | * @ returns TTL_DONT_CACHE so that ResourceBundle instance won't be cached. | ||
| 107 | * User of this CoreResourceBundleControl should probably maintain a hard reference | ||
| 108 | * to the ResourceBundle object themselves. | ||
| 109 | */ | ||
| 110 | @Override | ||
| 111 | public long getTimeToLive(String baseName, Locale locale) { | ||
| 112 | return ResourceBundle.Control.TTL_DONT_CACHE; | ||
| 113 | } | ||
| 114 | } | ||