LocaleData.java revision 5b7b7fe6a817fdf058eefd9a716cc58a3283eb05 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package libcore.icu;
18
19import java.text.DateFormat;
20import java.util.Arrays;
21import java.util.HashMap;
22import java.util.Locale;
23
24/**
25 * Passes locale-specific from ICU native code to Java.
26 * <p>
27 * Note that you share these; you must not alter any of the fields, nor their array elements
28 * in the case of arrays. If you ever expose any of these things to user code, you must give
29 * them a clone rather than the original.
30 */
31public final class LocaleData {
32    // A cache for the locale-specific data.
33    private static final HashMap<String, LocaleData> localeDataCache = new HashMap<String, LocaleData>();
34    static {
35        // Ensure that we pull in the locale data for the root locale, en_US, and the
36        // user's default locale. (All devices must support the root locale and en_US,
37        // and they're used for various system things like HTTP headers.) Pre-populating
38        // the cache is especially useful on Android because we'll share this via the Zygote.
39        get(Locale.ROOT);
40        get(Locale.US);
41        get(Locale.getDefault());
42    }
43
44    // Used by Calendar.
45    public Integer firstDayOfWeek;
46    public Integer minimalDaysInFirstWeek;
47
48    // Used by DateFormatSymbols.
49    public String[] amPm;
50    public String[] eras;
51
52    public String[] longMonthNames;
53    public String[] shortMonthNames;
54    public String[] longStandAloneMonthNames;
55    public String[] shortStandAloneMonthNames;
56
57    public String[] longWeekdayNames;
58    public String[] shortWeekdayNames;
59    public String[] longStandAloneWeekdayNames;
60    public String[] shortStandAloneWeekdayNames;
61
62    public String fullTimeFormat;
63    public String longTimeFormat;
64    public String mediumTimeFormat;
65    public String shortTimeFormat;
66
67    public String fullDateFormat;
68    public String longDateFormat;
69    public String mediumDateFormat;
70    public String shortDateFormat;
71
72    // Used by DecimalFormatSymbols.
73    public char zeroDigit;
74    public char decimalSeparator;
75    public char groupingSeparator;
76    public char patternSeparator;
77    public char percent;
78    public char perMill;
79    public char monetarySeparator;
80    public char minusSign;
81    public String exponentSeparator;
82    public String infinity;
83    public String NaN;
84    // Also used by Currency.
85    public String currencySymbol;
86    public String internationalCurrencySymbol;
87
88    // Used by DecimalFormat and NumberFormat.
89    public String numberPattern;
90    public String integerPattern;
91    public String currencyPattern;
92    public String percentPattern;
93
94    private LocaleData() {
95    }
96
97    /**
98     * Returns a shared LocaleData for the given locale.
99     */
100    public static LocaleData get(Locale locale) {
101        if (locale == null) {
102            locale = Locale.getDefault();
103        }
104        String localeName = locale.toString();
105        synchronized (localeDataCache) {
106            LocaleData localeData = localeDataCache.get(localeName);
107            if (localeData != null) {
108                return localeData;
109            }
110        }
111        LocaleData newLocaleData = initLocaleData(locale);
112        synchronized (localeDataCache) {
113            LocaleData localeData = localeDataCache.get(localeName);
114            if (localeData != null) {
115                return localeData;
116            }
117            localeDataCache.put(localeName, newLocaleData);
118            return newLocaleData;
119        }
120    }
121
122    @Override public String toString() {
123        return "LocaleData[" +
124                "firstDayOfWeek=" + firstDayOfWeek + "," +
125                "minimalDaysInFirstWeek=" + minimalDaysInFirstWeek + "," +
126                "amPm=" + Arrays.toString(amPm) + "," +
127                "eras=" + Arrays.toString(eras) + "," +
128                "longMonthNames=" + Arrays.toString(longMonthNames) + "," +
129                "shortMonthNames=" + Arrays.toString(shortMonthNames) + "," +
130                "longStandAloneMonthNames=" + Arrays.toString(longStandAloneMonthNames) + "," +
131                "shortStandAloneMonthNames=" + Arrays.toString(shortStandAloneMonthNames) + "," +
132                "longWeekdayNames=" + Arrays.toString(longWeekdayNames) + "," +
133                "shortWeekdayNames=" + Arrays.toString(shortWeekdayNames) + "," +
134                "longStandAloneWeekdayNames=" + Arrays.toString(longStandAloneWeekdayNames) + "," +
135                "shortStandAloneWeekdayNames=" + Arrays.toString(shortStandAloneWeekdayNames) + "," +
136                "fullTimeFormat=" + fullTimeFormat + "," +
137                "longTimeFormat=" + longTimeFormat + "," +
138                "mediumTimeFormat=" + mediumTimeFormat + "," +
139                "shortTimeFormat=" + shortTimeFormat + "," +
140                "fullDateFormat=" + fullDateFormat + "," +
141                "longDateFormat=" + longDateFormat + "," +
142                "mediumDateFormat=" + mediumDateFormat + "," +
143                "shortDateFormat=" + shortDateFormat + "," +
144                "zeroDigit=" + zeroDigit + "," +
145                "decimalSeparator=" + decimalSeparator + "," +
146                "groupingSeparator=" + groupingSeparator + "," +
147                "patternSeparator=" + patternSeparator + "," +
148                "percent=" + percent + "," +
149                "perMill=" + perMill + "," +
150                "monetarySeparator=" + monetarySeparator + "," +
151                "minusSign=" + minusSign + "," +
152                "exponentSeparator=" + exponentSeparator + "," +
153                "infinity=" + infinity + "," +
154                "NaN=" + NaN + "," +
155                "currencySymbol=" + currencySymbol + "," +
156                "internationalCurrencySymbol=" + internationalCurrencySymbol + "," +
157                "numberPattern=" + numberPattern + "," +
158                "integerPattern=" + integerPattern + "," +
159                "currencyPattern=" + currencyPattern + "," +
160                "percentPattern=" + percentPattern + "]";
161    }
162
163    public String getDateFormat(int style) {
164        switch (style) {
165        case DateFormat.SHORT:
166            return shortDateFormat;
167        case DateFormat.MEDIUM:
168            return mediumDateFormat;
169        case DateFormat.LONG:
170            return longDateFormat;
171        case DateFormat.FULL:
172            return fullDateFormat;
173        }
174        throw new AssertionError();
175    }
176
177    public String getTimeFormat(int style) {
178        switch (style) {
179        case DateFormat.SHORT:
180            return shortTimeFormat;
181        case DateFormat.MEDIUM:
182            return mediumTimeFormat;
183        case DateFormat.LONG:
184            return longTimeFormat;
185        case DateFormat.FULL:
186            return fullTimeFormat;
187        }
188        throw new AssertionError();
189    }
190
191    private static LocaleData initLocaleData(Locale locale) {
192        LocaleData localeData = new LocaleData();
193        if (!ICU.initLocaleDataImpl(locale.toString(), localeData)) {
194            throw new AssertionError("couldn't initialize LocaleData for locale " + locale);
195        }
196        if (localeData.fullTimeFormat != null) {
197            // There are some full time format patterns in ICU that use the pattern character 'v'.
198            // Java doesn't accept this, so we replace it with 'z' which has about the same result
199            // as 'v', the timezone name.
200            // 'v' -> "PT", 'z' -> "PST", v is the generic timezone and z the standard tz
201            // "vvvv" -> "Pacific Time", "zzzz" -> "Pacific Standard Time"
202            localeData.fullTimeFormat = localeData.fullTimeFormat.replace('v', 'z');
203        }
204        if (localeData.numberPattern != null) {
205            // The number pattern might contain positive and negative subpatterns. Arabic, for
206            // example, might look like "#,##0.###;#,##0.###-" because the minus sign should be
207            // written last. Macedonian supposedly looks something like "#,##0.###;(#,##0.###)".
208            // (The negative subpattern is optional, though, and not present in most locales.)
209            // By only swallowing '#'es and ','s after the '.', we ensure that we don't
210            // accidentally eat too much.
211            localeData.integerPattern = localeData.numberPattern.replaceAll("\\.[#,]*", "");
212        }
213        return localeData;
214    }
215}
216