author | jjg |
Thu, 10 Jun 2010 16:08:01 -0700 | |
changeset 5847 | 1908176fd6e3 |
parent 5520 | 86e4b9a9da40 |
child 9069 | bcab4a29758f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.tools.javac.util; |
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import com.sun.tools.javac.api.Messages; |
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import java.lang.ref.SoftReference; |
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import java.util.ResourceBundle; |
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import java.util.MissingResourceException; |
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import java.text.MessageFormat; |
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import java.util.HashMap; |
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import java.util.Locale; |
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import java.util.Map; |
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/** |
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* Support for formatted localized messages. |
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* |
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* <p><b>This is NOT part of any supported API. |
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* If you write code that depends on this, you do so at your own risk. |
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* This code and its internal interfaces are subject to change or |
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* deletion without notice.</b> |
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*/ |
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public class JavacMessages implements Messages { |
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/** The context key for the JavacMessages object. */ |
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protected static final Context.Key<JavacMessages> messagesKey = |
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new Context.Key<JavacMessages>(); |
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/** Get the JavacMessages instance for this context. */ |
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public static JavacMessages instance(Context context) { |
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JavacMessages instance = context.get(messagesKey); |
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if (instance == null) |
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instance = new JavacMessages(context); |
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return instance; |
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} |
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private Map<Locale, SoftReference<List<ResourceBundle>>> bundleCache; |
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private List<String> bundleNames; |
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private Locale currentLocale; |
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private List<ResourceBundle> currentBundles; |
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public Locale getCurrentLocale() { |
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return currentLocale; |
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} |
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public void setCurrentLocale(Locale locale) { |
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if (locale == null) { |
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locale = Locale.getDefault(); |
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} |
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this.currentBundles = getBundles(locale); |
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this.currentLocale = locale; |
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} |
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/** Creates a JavacMessages object. |
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*/ |
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public JavacMessages(Context context) { |
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this(defaultBundleName); |
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context.put(messagesKey, this); |
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} |
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/** Creates a JavacMessages object. |
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* @param bundleName the name to identify the resource buundle of localized messages. |
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*/ |
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public JavacMessages(String bundleName) throws MissingResourceException { |
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bundleNames = List.nil(); |
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bundleCache = new HashMap<Locale, SoftReference<List<ResourceBundle>>>(); |
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add(bundleName); |
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setCurrentLocale(Locale.getDefault()); |
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} |
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public JavacMessages() throws MissingResourceException { |
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this(defaultBundleName); |
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} |
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public void add(String bundleName) throws MissingResourceException { |
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bundleNames = bundleNames.prepend(bundleName); |
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if (!bundleCache.isEmpty()) |
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bundleCache.clear(); |
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currentBundles = null; |
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} |
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public List<ResourceBundle> getBundles(Locale locale) { |
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if (locale == currentLocale && currentBundles != null) |
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return currentBundles; |
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SoftReference<List<ResourceBundle>> bundles = bundleCache.get(locale); |
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List<ResourceBundle> bundleList = bundles == null ? null : bundles.get(); |
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if (bundleList == null) { |
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bundleList = List.nil(); |
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for (String bundleName : bundleNames) { |
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try { |
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ResourceBundle rb = ResourceBundle.getBundle(bundleName, locale); |
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bundleList = bundleList.prepend(rb); |
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} catch (MissingResourceException e) { |
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throw new InternalError("Cannot find javac resource bundle for locale " + locale); |
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} |
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} |
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bundleCache.put(locale, new SoftReference<List<ResourceBundle>>(bundleList)); |
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} |
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return bundleList; |
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} |
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/** Gets the localized string corresponding to a key, formatted with a set of args. |
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*/ |
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public String getLocalizedString(String key, Object... args) { |
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return getLocalizedString(currentLocale, key, args); |
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} |
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public String getLocalizedString(Locale l, String key, Object... args) { |
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if (l == null) |
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l = getCurrentLocale(); |
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return getLocalizedString(getBundles(l), key, args); |
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} |
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/* Static access: |
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* javac has a firmly entrenched notion of a default message bundle |
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* which it can access from any static context. This is used to get |
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* easy access to simple localized strings. |
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*/ |
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private static final String defaultBundleName = |
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"com.sun.tools.javac.resources.compiler"; |
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private static ResourceBundle defaultBundle; |
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private static JavacMessages defaultMessages; |
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/** |
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* Gets a localized string from the compiler's default bundle. |
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*/ |
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// used to support legacy Log.getLocalizedString |
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static String getDefaultLocalizedString(String key, Object... args) { |
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return getLocalizedString(List.of(getDefaultBundle()), key, args); |
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} |
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// used to support legacy static Diagnostic.fragment |
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@Deprecated |
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static JavacMessages getDefaultMessages() { |
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if (defaultMessages == null) |
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defaultMessages = new JavacMessages(defaultBundleName); |
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return defaultMessages; |
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} |
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public static ResourceBundle getDefaultBundle() { |
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try { |
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if (defaultBundle == null) |
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defaultBundle = ResourceBundle.getBundle(defaultBundleName); |
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return defaultBundle; |
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} |
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catch (MissingResourceException e) { |
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throw new Error("Fatal: Resource for compiler is missing", e); |
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} |
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} |
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private static String getLocalizedString(List<ResourceBundle> bundles, |
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String key, |
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Object... args) { |
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String msg = null; |
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for (List<ResourceBundle> l = bundles; l.nonEmpty() && msg == null; l = l.tail) { |
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ResourceBundle rb = l.head; |
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try { |
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msg = rb.getString(key); |
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} |
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catch (MissingResourceException e) { |
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// ignore, try other bundles in list |
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} |
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} |
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if (msg == null) { |
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msg = "compiler message file broken: key=" + key + |
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" arguments={0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}"; |
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} |
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return MessageFormat.format(msg, args); |
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} |
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} |