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

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

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

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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 java.util.ResourceBundle;
29 import java.util.MissingResourceException;
30 import java.text.MessageFormat;
31
32 /**
33 * Support for localized messages.
34 *
35 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
36 * you write code that depends on this, you do so at your own risk.
37 * This code and its internal interfaces are subject to change or
38 * deletion without notice.</b>
39 */
40 public class Messages {
41 /** The context key for the Messages object. */
42 protected static final Context.Key<Messages> messagesKey =
43 new Context.Key<Messages>();
44
45 /** Get the Messages instance for this context. */
46 public static Messages instance(Context context) {
47 Messages instance = context.get(messagesKey);
48 if (instance == null)
49 instance = new Messages(context);
50 return instance;
51 }
52
53 private List<ResourceBundle> bundles = List.nil();
54
55 /** Creates a Messages object.
56 */
57 public Messages(Context context) {
58 context.put(messagesKey, this);
59 add(getDefaultBundle());
60 }
61
62 /** Creates a Messages object.
63 * @param bundle the name to identify the resource buundle of localized messages.
64 */
65 public Messages(String bundleName) throws MissingResourceException {
66 add(bundleName);
67 }
68
69 /** Creates a Messages object.
70 * @param bundle the name to identif the resource buundle of localized messages.
71 */
72 public Messages(ResourceBundle bundle) throws MissingResourceException {
73 add(bundle);
74 }
75
76 /** Add a new resource bundle to the list that is searched for localized messages.
77 * @param bundle the name to identify the resource bundle of localized messages.
78 */
79 public void add(String bundleName) throws MissingResourceException {
80 add(ResourceBundle.getBundle(bundleName));
81 }
82
83 /** Add a new resource bundle to the list that is searched for localized messages.
84 * Resource bundles will be searched in reverse order in which they are added.
85 * @param bundle the bundle of localized messages.
86 */
87 public void add(ResourceBundle bundle) {
88 bundles = bundles.prepend(bundle);
89 }
90
91 /** Gets the localized string corresponding to a key, formatted with a set of args.
92 */
93 public String getLocalizedString(String key, Object... args) {
94 return getLocalizedString(bundles, key, args);
95 }
96
97
98 /* Static access:
99 * javac has a firmly entrenched notion of a default message bundle
100 * which it can access from any static context. This is used to get
101 * easy access to simple localized strings.
102 */
103
104 private static final String defaultBundleName =
105 "com.sun.tools.javac.resources.compiler";
106 private static ResourceBundle defaultBundle;
107 private static Messages defaultMessages;
108
109
110 /**
111 * Gets a localized string from the compiler's default bundle.
112 */
113 // used to support legacy Log.getLocalizedString
114 static String getDefaultLocalizedString(String key, Object... args) {
115 return getLocalizedString(List.of(getDefaultBundle()), key, args);
116 }
117
118 // used to support legacy static Diagnostic.fragment
119 static Messages getDefaultMessages() {
120 if (defaultMessages == null)
121 defaultMessages = new Messages(getDefaultBundle());
122 return defaultMessages;
123 }
124
125 public static ResourceBundle getDefaultBundle() {
126 try {
127 if (defaultBundle == null)
128 defaultBundle = ResourceBundle.getBundle(defaultBundleName);
129 return defaultBundle;
130 }
131 catch (MissingResourceException e) {
132 throw new Error("Fatal: Resource for compiler is missing", e);
133 }
134 }
135
136 private static String getLocalizedString(List<ResourceBundle> bundles,
137 String key,
138 Object... args) {
139 String msg = null;
140 for (List<ResourceBundle> l = bundles; l.nonEmpty() && msg == null; l = l.tail) {
141 ResourceBundle rb = l.head;
142 try {
143 msg = rb.getString(key);
144 }
145 catch (MissingResourceException e) {
146 // ignore, try other bundles in list
147 }
148 }
149 if (msg == null) {
150 msg = "compiler message file broken: key=" + key +
151 " arguments={0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}";
152 }
153 return MessageFormat.format(msg, args);
154 }
155
156
157 }

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