1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*******************************************************************************
* Copyright (c) 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.spi.p2.publisher;
import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.eclipse.equinox.internal.p2.core.helpers.CollectionUtils;
/**
* Helper functions supporting the processing of localized
* property files.
*
*/
public final class LocalizationHelper {
private static final String PROPERTIES_FILE_EXTENSION = ".properties"; //$NON-NLS-1$
private static final Locale DEFAULT_LOCALE = new Locale("df", "LT"); //$NON-NLS-1$//$NON-NLS-2$
private static LocalizationHelper instance = new LocalizationHelper();
// Extract the locale string from the properties file with the given filename
// where the locale string follows the given prefix. For example, return "zh_HK"
// from filename == "plugin_zh_HK.properties" and prefix == "plugin".
static public String getLocaleString(String filename, String prefix) {
String localeString = null;
if (filename.startsWith(prefix) && filename.endsWith(PROPERTIES_FILE_EXTENSION)) {
if (filename.length() > prefix.length() + PROPERTIES_FILE_EXTENSION.length()) {
localeString = filename.substring(prefix.length() + 1, filename.length() - PROPERTIES_FILE_EXTENSION.length());
} else {
localeString = ""; //$NON-NLS-1$
}
}
return localeString;
}
// Get the locale corresponding to the given locale string
static public Locale getLocale(String localeString) {
Locale locale = DEFAULT_LOCALE;
if (localeString.length() == 5 && localeString.indexOf('_') == 2) {
locale = new Locale(localeString.substring(0, 2), localeString.substring(3, 5));
} else if (localeString.length() == 2) {
locale = new Locale(localeString.substring(0, 2));
}
return locale;
}
// For the given root directory and path to localization files within that directory
// get a map from locale to property set for the localization property files.
public static Map<Locale, Map<String, String>> getDirPropertyLocalizations(File root, String localizationPath, Locale defaultLocale, String[] propertyKeys) {
File fullPath = new File(root, localizationPath);
File localizationDir = fullPath.getParentFile();
final String localizationFile = fullPath.getName();
String[] localizationFiles = LocalizationHelper.getLocalizationFiles(localizationDir, localizationFile);
HashMap<Locale, Map<String, String>> localizations = null;
if (localizationFiles != null && localizationFiles.length > 0) {
localizations = new HashMap<Locale, Map<String, String>>(localizationFiles.length);
for (int i = 0; i < localizationFiles.length; i++) {
String nextFile = localizationFiles[i];
Locale nextLocale = getLocale(LocalizationHelper.getLocaleString(nextFile, localizationFile));
try {
Map<String, String> properties = loadProperties(root, nextFile);
Map<String, String> localizedStrings = getLocalizedProperties(propertyKeys, properties);
if (localizedStrings.size() > 0) {
localizations.put(nextLocale, localizedStrings);
if (DEFAULT_LOCALE.equals(nextLocale) && defaultLocale != null) {
localizations.put(nextLocale, localizedStrings);
}
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
return localizations;
}
public static Map<Locale, Map<String, String>> getJarPropertyLocalizations(File root, String localizationPath, Locale defaultLocale, String[] propertyKeys) {
ZipFile jarFile = null;
Map<Locale, Map<String, String>> localizations = new HashMap<Locale, Map<String, String>>(4);
try {
jarFile = new ZipFile(root, ZipFile.OPEN_READ);
for (Enumeration<? extends ZipEntry> entries = jarFile.entries(); entries.hasMoreElements();) {
ZipEntry nextEntry = entries.nextElement();
String nextName = nextEntry.getName();
String localeString = LocalizationHelper.getLocaleString(nextName, localizationPath);
if (!nextEntry.isDirectory() && localeString != null) {
Locale nextLocale = LocalizationHelper.getLocale(localeString);
InputStream stream = null;
try {
stream = jarFile.getInputStream(nextEntry);
Map<String, String> properties = CollectionUtils.loadProperties(stream);
Map<String, String> localizedStrings = LocalizationHelper.getLocalizedProperties(propertyKeys, properties);
if (localizedStrings.size() > 0) {
localizations.put(nextLocale, localizedStrings);
if (DEFAULT_LOCALE.equals(nextLocale) && defaultLocale != null) {
localizations.put(nextLocale, localizedStrings);
}
}
} finally {
if (stream != null)
stream.close();
}
}
}
} catch (IOException ioe) {
ioe.printStackTrace();
} finally {
if (jarFile != null) {
try {
jarFile.close();
} catch (IOException ioe) {
// do nothing
}
}
}
return localizations;
}
// Load a property set from given root and file with the given name
private static Map<String, String> loadProperties(File root, String propertyFilename) throws IOException {
InputStream propertyStream = null;
try {
try {
if (root.isDirectory())
propertyStream = new FileInputStream(new File(root, propertyFilename));
else {
URLConnection connection = new URL("jar:" + root.toURL().toExternalForm() + "!/" + propertyFilename).openConnection(); //$NON-NLS-1$ //$NON-NLS-2$
connection.setUseCaches(false);
propertyStream = connection.getInputStream();
}
} catch (FileNotFoundException e) {
// if there is no messages file then just return;
return CollectionUtils.emptyMap();
}
return CollectionUtils.loadProperties(propertyStream);
} finally {
if (propertyStream != null)
propertyStream.close();
}
}
// Given a list of keys and the corresponding localized property set,
// return a new property set with those keys and the localized values.
static public Map<String, String> getLocalizedProperties(String[] propertyKeys, Map<String, String> properties) {
Map<String, String> localizedProperties = new HashMap<String, String>();
for (int i = 0; i < propertyKeys.length; i++) {
String key = propertyKeys[i];
if (key != null) {
String localizedValue = properties.get(key);
if (localizedValue != null)
localizedProperties.put(key, localizedValue);
}
}
return localizedProperties;
}
public static String[] getLocalizationFiles(File localizationDir, final String filenamePrefix) {
return localizationDir.list(instance.new FileFilter() {
public boolean accept(File directory, String filename) {
return (getLocaleString(filename, filenamePrefix) != null ? true : false);
}
});
}
private abstract class FileFilter implements FilenameFilter {
public FileFilter() {
// Nothing to do
}
/* (non-Javadoc)
* @see java.io.FilenameFilter#accept(java.io.File, java.lang.String)
*/
public abstract boolean accept(File directory, String filename);
}
private LocalizationHelper() {
//
}
}
|
