| /* |
| * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #warn This file is preprocessed before being compiled |
| |
| package sun.util; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.ResourceBundle; |
| import java.util.ResourceBundle.Control; |
| |
| /** |
| * This is a convenient class for loading some of internal resources faster |
| * if they are built with Resources.gmk defined in J2SE workspace. Also, |
| * they have to be in class file format. |
| * |
| * "LOCALE_LIST" will be replaced at built time by a list of locales we |
| * defined in Defs.gmk. We want to exclude these locales from search to |
| * gain better performance. For example, since we know if the resource |
| * is built with Resources.gmk, they are not going to provide basename_en.class |
| * & basename_en_US.class resources, in that case, continuing searching them |
| * is expensive. By excluding them from the candidate locale list, these |
| * resources won't be searched. |
| * |
| * @since 1.6. |
| */ |
| public class CoreResourceBundleControl extends ResourceBundle.Control { |
| /* the candidate locale list to search */ |
| private final Collection<Locale> excludedJDKLocales; |
| /* singlton instance of the resource bundle control. */ |
| private static CoreResourceBundleControl resourceBundleControlInstance = |
| new CoreResourceBundleControl(); |
| |
| protected CoreResourceBundleControl() { |
| excludedJDKLocales = Arrays.asList(#LOCALE_LIST#); |
| } |
| |
| /** |
| * This method is to provide a customized ResourceBundle.Control to speed |
| * up the search of resources in JDK. |
| * |
| * @return the instance of resource bundle control. |
| */ |
| public static CoreResourceBundleControl getRBControlInstance() { |
| return resourceBundleControlInstance; |
| } |
| |
| /** |
| * This method is to provide a customized ResourceBundle.Control to speed |
| * up the search of resources in JDK, with the bundle's package name check. |
| * |
| * @param bundleName bundle name to check |
| * @return the instance of resource bundle control if the bundle is JDK's, |
| * otherwise returns null. |
| */ |
| public static CoreResourceBundleControl getRBControlInstance(String bundleName) { |
| if (bundleName.startsWith("com.sun.") || |
| bundleName.startsWith("java.") || |
| bundleName.startsWith("javax.") || |
| bundleName.startsWith("sun.")) { |
| return resourceBundleControlInstance; |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * @returns a list of candidate locales to search from. |
| * @exception NullPointerException if baseName or locale is null. |
| */ |
| @Override |
| public List<Locale> getCandidateLocales(String baseName, Locale locale) { |
| List<Locale> candidates = super.getCandidateLocales(baseName, locale); |
| candidates.removeAll(excludedJDKLocales); |
| return candidates; |
| } |
| |
| /** |
| * @ returns TTL_DONT_CACHE so that ResourceBundle instance won't be cached. |
| * User of this CoreResourceBundleControl should probably maintain a hard reference |
| * to the ResourceBundle object themselves. |
| */ |
| @Override |
| public long getTimeToLive(String baseName, Locale locale) { |
| return ResourceBundle.Control.TTL_DONT_CACHE; |
| } |
| } |