duke@1: /* duke@1: * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. duke@1: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@1: * duke@1: * This code is free software; you can redistribute it and/or modify it duke@1: * under the terms of the GNU General Public License version 2 only, as duke@1: * published by the Free Software Foundation. Sun designates this duke@1: * particular file as subject to the "Classpath" exception as provided duke@1: * by Sun in the LICENSE file that accompanied this code. duke@1: * duke@1: * This code is distributed in the hope that it will be useful, but WITHOUT duke@1: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@1: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@1: * version 2 for more details (a copy is included in the LICENSE file that duke@1: * accompanied this code). duke@1: * duke@1: * You should have received a copy of the GNU General Public License version duke@1: * 2 along with this work; if not, write to the Free Software Foundation, duke@1: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@1: * duke@1: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, duke@1: * CA 95054 USA or visit www.sun.com if you need additional information or duke@1: * have any questions. duke@1: */ duke@1: duke@1: package com.sun.tools.javac.util; duke@1: duke@1: import java.util.ResourceBundle; duke@1: import java.util.MissingResourceException; duke@1: import java.text.MessageFormat; duke@1: duke@1: /** duke@1: * Support for localized messages. duke@1: * duke@1: *

This is NOT part of any API supported by Sun Microsystems. If duke@1: * you write code that depends on this, you do so at your own risk. duke@1: * This code and its internal interfaces are subject to change or duke@1: * deletion without notice. duke@1: */ duke@1: public class Messages { duke@1: /** The context key for the Messages object. */ duke@1: protected static final Context.Key messagesKey = duke@1: new Context.Key(); duke@1: duke@1: /** Get the Messages instance for this context. */ duke@1: public static Messages instance(Context context) { duke@1: Messages instance = context.get(messagesKey); duke@1: if (instance == null) duke@1: instance = new Messages(context); duke@1: return instance; duke@1: } duke@1: duke@1: private List bundles = List.nil(); duke@1: duke@1: /** Creates a Messages object. duke@1: */ duke@1: public Messages(Context context) { duke@1: context.put(messagesKey, this); duke@1: add(getDefaultBundle()); duke@1: } duke@1: duke@1: /** Creates a Messages object. duke@1: * @param bundle the name to identify the resource buundle of localized messages. duke@1: */ duke@1: public Messages(String bundleName) throws MissingResourceException { duke@1: add(bundleName); duke@1: } duke@1: duke@1: /** Creates a Messages object. duke@1: * @param bundle the name to identif the resource buundle of localized messages. duke@1: */ duke@1: public Messages(ResourceBundle bundle) throws MissingResourceException { duke@1: add(bundle); duke@1: } duke@1: duke@1: /** Add a new resource bundle to the list that is searched for localized messages. duke@1: * @param bundle the name to identify the resource bundle of localized messages. duke@1: */ duke@1: public void add(String bundleName) throws MissingResourceException { duke@1: add(ResourceBundle.getBundle(bundleName)); duke@1: } duke@1: duke@1: /** Add a new resource bundle to the list that is searched for localized messages. duke@1: * Resource bundles will be searched in reverse order in which they are added. duke@1: * @param bundle the bundle of localized messages. duke@1: */ duke@1: public void add(ResourceBundle bundle) { duke@1: bundles = bundles.prepend(bundle); duke@1: } duke@1: duke@1: /** Gets the localized string corresponding to a key, formatted with a set of args. duke@1: */ duke@1: public String getLocalizedString(String key, Object... args) { duke@1: return getLocalizedString(bundles, key, args); duke@1: } duke@1: duke@1: duke@1: /* Static access: duke@1: * javac has a firmly entrenched notion of a default message bundle duke@1: * which it can access from any static context. This is used to get duke@1: * easy access to simple localized strings. duke@1: */ duke@1: duke@1: private static final String defaultBundleName = duke@1: "com.sun.tools.javac.resources.compiler"; duke@1: private static ResourceBundle defaultBundle; duke@1: private static Messages defaultMessages; duke@1: duke@1: duke@1: /** duke@1: * Gets a localized string from the compiler's default bundle. duke@1: */ duke@1: // used to support legacy Log.getLocalizedString duke@1: static String getDefaultLocalizedString(String key, Object... args) { duke@1: return getLocalizedString(List.of(getDefaultBundle()), key, args); duke@1: } duke@1: duke@1: // used to support legacy static Diagnostic.fragment duke@1: static Messages getDefaultMessages() { duke@1: if (defaultMessages == null) duke@1: defaultMessages = new Messages(getDefaultBundle()); duke@1: return defaultMessages; duke@1: } duke@1: duke@1: public static ResourceBundle getDefaultBundle() { duke@1: try { duke@1: if (defaultBundle == null) duke@1: defaultBundle = ResourceBundle.getBundle(defaultBundleName); duke@1: return defaultBundle; duke@1: } duke@1: catch (MissingResourceException e) { duke@1: throw new Error("Fatal: Resource for compiler is missing", e); duke@1: } duke@1: } duke@1: duke@1: private static String getLocalizedString(List bundles, duke@1: String key, duke@1: Object... args) { duke@1: String msg = null; duke@1: for (List l = bundles; l.nonEmpty() && msg == null; l = l.tail) { duke@1: ResourceBundle rb = l.head; duke@1: try { duke@1: msg = rb.getString(key); duke@1: } duke@1: catch (MissingResourceException e) { duke@1: // ignore, try other bundles in list duke@1: } duke@1: } duke@1: if (msg == null) { duke@1: msg = "compiler message file broken: key=" + key + duke@1: " arguments={0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}"; duke@1: } duke@1: return MessageFormat.format(msg, args); duke@1: } duke@1: duke@1: duke@1: }