| /* |
| * Copyright 2005 Sun Microsystems, Inc. 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. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package com.sun.tools.javac.util; |
| |
| import com.sun.tools.javac.api.Messages; |
| import java.lang.ref.SoftReference; |
| import java.util.ResourceBundle; |
| import java.util.MissingResourceException; |
| import java.text.MessageFormat; |
| import java.util.HashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| /** |
| * Support for formatted localized messages. |
| * |
| * <p><b>This is NOT part of any API supported by Sun Microsystems. If |
| * you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class JavacMessages implements Messages { |
| /** The context key for the JavacMessages object. */ |
| protected static final Context.Key<JavacMessages> messagesKey = |
| new Context.Key<JavacMessages>(); |
| |
| /** Get the JavacMessages instance for this context. */ |
| public static JavacMessages instance(Context context) { |
| JavacMessages instance = context.get(messagesKey); |
| if (instance == null) |
| instance = new JavacMessages(context); |
| return instance; |
| } |
| |
| private Map<Locale, SoftReference<List<ResourceBundle>>> bundleCache; |
| |
| private List<String> bundleNames; |
| |
| private Locale currentLocale; |
| private List<ResourceBundle> currentBundles; |
| |
| public Locale getCurrentLocale() { |
| return currentLocale; |
| } |
| |
| public void setCurrentLocale(Locale locale) { |
| if (locale == null) { |
| locale = Locale.getDefault(); |
| } |
| this.currentBundles = getBundles(locale); |
| this.currentLocale = locale; |
| } |
| |
| /** Creates a JavacMessages object. |
| */ |
| public JavacMessages(Context context) { |
| this(defaultBundleName); |
| context.put(messagesKey, this); |
| } |
| |
| /** Creates a JavacMessages object. |
| * @param bundleName the name to identify the resource buundle of localized messages. |
| */ |
| public JavacMessages(String bundleName) throws MissingResourceException { |
| bundleNames = List.nil(); |
| bundleCache = new HashMap<Locale, SoftReference<List<ResourceBundle>>>(); |
| add(bundleName); |
| setCurrentLocale(Locale.getDefault()); |
| } |
| |
| public JavacMessages() throws MissingResourceException { |
| this(defaultBundleName); |
| } |
| |
| public void add(String bundleName) throws MissingResourceException { |
| bundleNames = bundleNames.prepend(bundleName); |
| if (!bundleCache.isEmpty()) |
| bundleCache.clear(); |
| currentBundles = null; |
| } |
| |
| public List<ResourceBundle> getBundles(Locale locale) { |
| if (locale == currentLocale && currentBundles != null) |
| return currentBundles; |
| SoftReference<List<ResourceBundle>> bundles = bundleCache.get(locale); |
| List<ResourceBundle> bundleList = bundles == null ? null : bundles.get(); |
| if (bundleList == null) { |
| bundleList = List.nil(); |
| for (String bundleName : bundleNames) { |
| try { |
| ResourceBundle rb = ResourceBundle.getBundle(bundleName, locale); |
| bundleList = bundleList.prepend(rb); |
| } catch (MissingResourceException e) { |
| throw new InternalError("Cannot find javac resource bundle for locale " + locale); |
| } |
| } |
| bundleCache.put(locale, new SoftReference<List<ResourceBundle>>(bundleList)); |
| } |
| return bundleList; |
| } |
| |
| /** Gets the localized string corresponding to a key, formatted with a set of args. |
| */ |
| public String getLocalizedString(String key, Object... args) { |
| return getLocalizedString(currentLocale, key, args); |
| } |
| |
| public String getLocalizedString(Locale l, String key, Object... args) { |
| if (l == null) |
| l = getCurrentLocale(); |
| return getLocalizedString(getBundles(l), key, args); |
| } |
| |
| /* Static access: |
| * javac has a firmly entrenched notion of a default message bundle |
| * which it can access from any static context. This is used to get |
| * easy access to simple localized strings. |
| */ |
| |
| private static final String defaultBundleName = |
| "com.sun.tools.javac.resources.compiler"; |
| private static ResourceBundle defaultBundle; |
| private static JavacMessages defaultMessages; |
| |
| |
| /** |
| * Gets a localized string from the compiler's default bundle. |
| */ |
| // used to support legacy Log.getLocalizedString |
| static String getDefaultLocalizedString(String key, Object... args) { |
| return getLocalizedString(List.of(getDefaultBundle()), key, args); |
| } |
| |
| // used to support legacy static Diagnostic.fragment |
| @Deprecated |
| static JavacMessages getDefaultMessages() { |
| if (defaultMessages == null) |
| defaultMessages = new JavacMessages(defaultBundleName); |
| return defaultMessages; |
| } |
| |
| public static ResourceBundle getDefaultBundle() { |
| try { |
| if (defaultBundle == null) |
| defaultBundle = ResourceBundle.getBundle(defaultBundleName); |
| return defaultBundle; |
| } |
| catch (MissingResourceException e) { |
| throw new Error("Fatal: Resource for compiler is missing", e); |
| } |
| } |
| |
| private static String getLocalizedString(List<ResourceBundle> bundles, |
| String key, |
| Object... args) { |
| String msg = null; |
| for (List<ResourceBundle> l = bundles; l.nonEmpty() && msg == null; l = l.tail) { |
| ResourceBundle rb = l.head; |
| try { |
| msg = rb.getString(key); |
| } |
| catch (MissingResourceException e) { |
| // ignore, try other bundles in list |
| } |
| } |
| if (msg == null) { |
| msg = "compiler message file broken: key=" + key + |
| " arguments={0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}"; |
| } |
| return MessageFormat.format(msg, args); |
| } |
| } |