1 /*
2 * Copyright (c) 2015, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.util.locale.provider;
27
28 import java.io.IOException;
29 import java.io.InputStream;
30 import java.io.UncheckedIOException;
31 import java.lang.reflect.Constructor;
32 import java.lang.reflect.InvocationTargetException;
33 import java.lang.reflect.Modifier;
34 import java.lang.reflect.Module;
35 import java.security.AccessController;
36 import java.security.PrivilegedAction;
37 import java.util.PropertyResourceBundle;
38 import java.util.ResourceBundle;
39
40 import jdk.internal.misc.BootLoader;
41 import sun.misc.Unsafe;
42
43
44 /**
45 * ResourceBundleProviderSupport provides convenience methods for loading
46 * resource bundles.
47 */
48 public class ResourceBundleProviderSupport {
49 /**
50 * Loads a {@code ResourceBundle} of the given {@code bundleName} local to
51 * the given {@code module}.
52 *
53 * @param module the module from which the {@code ResourceBundle} is loaded
54 * @param bundleName the bundle name for the {@code ResourceBundle} class,
55 * such as "com.example.app.MyResources_fr"
56 * @return the {@code ResourceBundle}, or null if no {@code ResourceBundle} is found
57 */
58 public static ResourceBundle loadResourceBundle(Module module, String bundleName)
59 {
60 // TODO: security permission check to access a bundle in another module?
61 PrivilegedAction<Class<?>> pa = () -> Class.forName(module, bundleName);
62 Class<?> c = AccessController.doPrivileged(pa);
63 if (c != null && ResourceBundle.class.isAssignableFrom(c)) {
64 try {
65 @SuppressWarnings("unchecked")
66 Class<ResourceBundle> bundleClass = (Class<ResourceBundle>) c;
67 Constructor<ResourceBundle> ctor = bundleClass.getConstructor();
68 if (!Modifier.isPublic(ctor.getModifiers())) {
69 return null;
70 }
71
72 // java.base may not be able to read the bundleClass's module.
73 PrivilegedAction<Void> pa1 = () -> { ctor.setAccessible(true); return null; };
74 AccessController.doPrivileged(pa1);
75 try {
76 return ctor.newInstance((Object[]) null);
77 } catch (InvocationTargetException e) {
78 Unsafe.getUnsafe().throwException(e.getTargetException());
79 } catch (InstantiationException | IllegalAccessException e) {
80 throw new InternalError(e);
81 }
82 } catch (NoSuchMethodException e) {
83 }
84 }
85 return null;
86 }
87
88 /**
89 * Loads properties of the given {@code bundleName} local to the given
90 * {@code module} and returns a {@code ResourceBundle} produced from the
91 * loaded properties.
92 *
93 * @apiNote This method is intended for internal use. Need to refactor.
94 *
95 * @param module the module from which the properties are loaded
96 * @param bundleName the bundle name of the properties,
97 * such as "com.example.app.MyResources_de"
98 * @return the {@code ResourceBundle} produced from the loaded properties,
99 * or null if no properties are found
100 * @see PropertiesResourceBundle
101 */
102 public static ResourceBundle loadPropertyResourceBundle(Module module, String bundleName)
103 throws IOException
104 {
105 String resourceName = toResourceName(bundleName, "properties");
106 if (resourceName == null) {
107 return null;
108 }
109
110 PrivilegedAction<InputStream> pa = () -> {
111 try {
112 return module.getResourceAsStream(resourceName);
113 } catch (IOException e) {
114 throw new UncheckedIOException(e);
115 }
116 };
117 try (InputStream stream = AccessController.doPrivileged(pa)) {
118 if (stream != null) {
119 return new PropertyResourceBundle(stream);
120 } else {
121 return null;
122 }
123 } catch (UncheckedIOException e) {
124 throw e.getCause();
125 }
126 }
127
128 private static String toResourceName(String bundleName, String suffix) {
129 if (bundleName.contains("://")) {
130 return null;
131 }
132 StringBuilder sb = new StringBuilder(bundleName.length() + 1 + suffix.length());
133 sb.append(bundleName.replace('.', '/')).append('.').append(suffix);
134 return sb.toString();
135 }
136 }