--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/javac/util/JavacMessages.java Thu Oct 09 16:07:38 2008 +0100
@@ -0,0 +1,194 @@
+/*
+ * 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();
+ }
+
+ public List<ResourceBundle> getBundles(Locale locale) {
+ if (locale == currentLocale)
+ 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);
+ }
+}