Mercurial > jdk8-mips64-public > langtools / file comparison

comparison: src/share/classes/com/sun/tools/javac/util/JavacMessages.java

src/share/classes/com/sun/tools/javac/util/JavacMessages.java

changeset 136
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parent 1
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child 141
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135:ac6ce899d007 136:8eafba4f61be
1 /*
2 * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package com.sun.tools.javac.util;
27
28 import com.sun.tools.javac.api.Messages;
29 import java.lang.ref.SoftReference;
30 import java.util.ResourceBundle;
31 import java.util.MissingResourceException;
32 import java.text.MessageFormat;
33 import java.util.HashMap;
34 import java.util.Locale;
35 import java.util.Map;
36
37 /**
38 * Support for formatted localized messages.
39 *
40 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
41 * you write code that depends on this, you do so at your own risk.
42 * This code and its internal interfaces are subject to change or
43 * deletion without notice.</b>
44 */
45 public class JavacMessages implements Messages {
46 /** The context key for the JavacMessages object. */
47 protected static final Context.Key<JavacMessages> messagesKey =
48 new Context.Key<JavacMessages>();
49
50 /** Get the JavacMessages instance for this context. */
51 public static JavacMessages instance(Context context) {
52 JavacMessages instance = context.get(messagesKey);
53 if (instance == null)
54 instance = new JavacMessages(context);
55 return instance;
56 }
57
58 private Map<Locale, SoftReference<List<ResourceBundle>>> bundleCache;
59
60 private List<String> bundleNames;
61
62 private Locale currentLocale;
63 private List<ResourceBundle> currentBundles;
64
65 public Locale getCurrentLocale() {
66 return currentLocale;
67 }
68
69 public void setCurrentLocale(Locale locale) {
70 if (locale == null) {
71 locale = Locale.getDefault();
72 }
73 this.currentBundles = getBundles(locale);
74 this.currentLocale = locale;
75 }
76
77 /** Creates a JavacMessages object.
78 */
79 public JavacMessages(Context context) {
80 this(defaultBundleName);
81 context.put(messagesKey, this);
82 }
83
84 /** Creates a JavacMessages object.
85 * @param bundleName the name to identify the resource buundle of localized messages.
86 */
87 public JavacMessages(String bundleName) throws MissingResourceException {
88 bundleNames = List.nil();
89 bundleCache = new HashMap<Locale, SoftReference<List<ResourceBundle>>>();
90 add(bundleName);
91 setCurrentLocale(Locale.getDefault());
92 }
93
94 public JavacMessages() throws MissingResourceException {
95 this(defaultBundleName);
96 }
97
98 public void add(String bundleName) throws MissingResourceException {
99 bundleNames = bundleNames.prepend(bundleName);
100 if (!bundleCache.isEmpty())
101 bundleCache.clear();
102 }
103
104 public List<ResourceBundle> getBundles(Locale locale) {
105 if (locale == currentLocale)
106 return currentBundles;
107 SoftReference<List<ResourceBundle>> bundles = bundleCache.get(locale);
108 List<ResourceBundle> bundleList = bundles == null ? null : bundles.get();
109 if (bundleList == null) {
110 bundleList = List.nil();
111 for (String bundleName : bundleNames) {
112 try {
113 ResourceBundle rb = ResourceBundle.getBundle(bundleName, locale);
114 bundleList = bundleList.prepend(rb);
115 } catch (MissingResourceException e) {
116 throw new InternalError("Cannot find javac resource bundle for locale " + locale);
117 }
118 }
119 bundleCache.put(locale, new SoftReference<List<ResourceBundle>>(bundleList));
120 }
121 return bundleList;
122 }
123
124 /** Gets the localized string corresponding to a key, formatted with a set of args.
125 */
126 public String getLocalizedString(String key, Object... args) {
127 return getLocalizedString(currentLocale, key, args);
128 }
129
130 public String getLocalizedString(Locale l, String key, Object... args) {
131 if (l == null)
132 l = getCurrentLocale();
133 return getLocalizedString(getBundles(l), key, args);
134 }
135
136 /* Static access:
137 * javac has a firmly entrenched notion of a default message bundle
138 * which it can access from any static context. This is used to get
139 * easy access to simple localized strings.
140 */
141
142 private static final String defaultBundleName =
143 "com.sun.tools.javac.resources.compiler";
144 private static ResourceBundle defaultBundle;
145 private static JavacMessages defaultMessages;
146
147
148 /**
149 * Gets a localized string from the compiler's default bundle.
150 */
151 // used to support legacy Log.getLocalizedString
152 static String getDefaultLocalizedString(String key, Object... args) {
153 return getLocalizedString(List.of(getDefaultBundle()), key, args);
154 }
155
156 // used to support legacy static Diagnostic.fragment
157 @Deprecated
158 static JavacMessages getDefaultMessages() {
159 if (defaultMessages == null)
160 defaultMessages = new JavacMessages(defaultBundleName);
161 return defaultMessages;
162 }
163
164 public static ResourceBundle getDefaultBundle() {
165 try {
166 if (defaultBundle == null)
167 defaultBundle = ResourceBundle.getBundle(defaultBundleName);
168 return defaultBundle;
169 }
170 catch (MissingResourceException e) {
171 throw new Error("Fatal: Resource for compiler is missing", e);
172 }
173 }
174
175 private static String getLocalizedString(List<ResourceBundle> bundles,
176 String key,
177 Object... args) {
178 String msg = null;
179 for (List<ResourceBundle> l = bundles; l.nonEmpty() && msg == null; l = l.tail) {
180 ResourceBundle rb = l.head;
181 try {
182 msg = rb.getString(key);
183 }
184 catch (MissingResourceException e) {
185 // ignore, try other bundles in list
186 }
187 }
188 if (msg == null) {
189 msg = "compiler message file broken: key=" + key +
190 " arguments={0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}";
191 }
192 return MessageFormat.format(msg, args);
193 }
194 }

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