LocaleData.java revision 4f32b7933626e100fca505484f8b4636f3342e5e 
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;
23import libcore.util.Objects;
24
25/**
26 * Passes locale-specific from ICU native code to Java.
27 * <p>
28 * Note that you share these; you must not alter any of the fields, nor their array elements
29 * in the case of arrays. If you ever expose any of these things to user code, you must give
30 * them a clone rather than the original.
31 */
32public final class LocaleData {
33    // A cache for the locale-specific data.
34    private static final HashMap<String, LocaleData> localeDataCache = new HashMap<String, LocaleData>();
35    static {
36        // Ensure that we pull in the locale data for the root locale, en_US, and the
37        // user's default locale. (All devices must support the root locale and en_US,
38        // and they're used for various system things like HTTP headers.) Pre-populating
39        // the cache is especially useful on Android because we'll share this via the Zygote.
40        get(Locale.ROOT);
41        get(Locale.US);
42        get(Locale.getDefault());
43    }
44
45    // Used by Calendar.
46    public Integer firstDayOfWeek;
47    public Integer minimalDaysInFirstWeek;
48
49    // Used by DateFormatSymbols.
50    public String[] amPm; // "AM", "PM".
51    public String[] eras; // "BC", "AD".
52
53    public String[] longMonthNames; // "January", ...
54    public String[] shortMonthNames; // "Jan", ...
55    public String[] tinyMonthNames; // "J", ...
56    public String[] longStandAloneMonthNames; // "January", ...
57    public String[] shortStandAloneMonthNames; // "Jan", ...
58    public String[] tinyStandAloneMonthNames; // "J", ...
59
60    public String[] longWeekdayNames; // "Sunday", ...
61    public String[] shortWeekdayNames; // "Sun", ...
62    public String[] tinyWeekdayNames; // "S", ...
63    public String[] longStandAloneWeekdayNames; // "Sunday", ...
64    public String[] shortStandAloneWeekdayNames; // "Sun", ...
65    public String[] tinyStandAloneWeekdayNames; // "S", ...
66
67    // Used by frameworks/base DateSorter and DateUtils.
68    public String yesterday; // "Yesterday".
69    public String today; // "Today".
70    public String tomorrow; // "Tomorrow".
71
72    public String fullTimeFormat;
73    public String longTimeFormat;
74    public String mediumTimeFormat;
75    public String shortTimeFormat;
76
77    public String fullDateFormat;
78    public String longDateFormat;
79    public String mediumDateFormat;
80    public String shortDateFormat;
81
82    // Used by android.text.format.DateFormat.getTimeFormat.
83    public String timeFormat12; // "hh:mm a"
84    public String timeFormat24; // "HH:mm"
85
86    // Used by DecimalFormatSymbols.
87    public char zeroDigit;
88    public char decimalSeparator;
89    public char groupingSeparator;
90    public char patternSeparator;
91    public char percent;
92    public char perMill;
93    public char monetarySeparator;
94    public char minusSign;
95    public String exponentSeparator;
96    public String infinity;
97    public String NaN;
98    // Also used by Currency.
99    public String currencySymbol;
100    public String internationalCurrencySymbol;
101
102    // Used by DecimalFormat and NumberFormat.
103    public String numberPattern;
104    public String integerPattern;
105    public String currencyPattern;
106    public String percentPattern;
107
108    private LocaleData() {
109    }
110
111    /**
112     * Returns a shared LocaleData for the given locale.
113     */
114    public static LocaleData get(Locale locale) {
115        if (locale == null) {
116            locale = Locale.getDefault();
117        }
118        String localeName = locale.toString();
119        synchronized (localeDataCache) {
120            LocaleData localeData = localeDataCache.get(localeName);
121            if (localeData != null) {
122                return localeData;
123            }
124        }
125        LocaleData newLocaleData = initLocaleData(locale);
126        synchronized (localeDataCache) {
127            LocaleData localeData = localeDataCache.get(localeName);
128            if (localeData != null) {
129                return localeData;
130            }
131            localeDataCache.put(localeName, newLocaleData);
132            return newLocaleData;
133        }
134    }
135
136    @Override public String toString() {
137        return Objects.toString(this);
138    }
139
140    public String getDateFormat(int style) {
141        switch (style) {
142        case DateFormat.SHORT:
143            return shortDateFormat;
144        case DateFormat.MEDIUM:
145            return mediumDateFormat;
146        case DateFormat.LONG:
147            return longDateFormat;
148        case DateFormat.FULL:
149            return fullDateFormat;
150        }
151        throw new AssertionError();
152    }
153
154    public String getTimeFormat(int style) {
155        switch (style) {
156        case DateFormat.SHORT:
157            return shortTimeFormat;
158        case DateFormat.MEDIUM:
159            return mediumTimeFormat;
160        case DateFormat.LONG:
161            return longTimeFormat;
162        case DateFormat.FULL:
163            return fullTimeFormat;
164        }
165        throw new AssertionError();
166    }
167
168    private static LocaleData initLocaleData(Locale locale) {
169        LocaleData localeData = new LocaleData();
170        if (!ICU.initLocaleDataImpl(locale.toString(), localeData)) {
171            throw new AssertionError("couldn't initialize LocaleData for locale " + locale);
172        }
173        if (localeData.fullTimeFormat != null) {
174            // There are some full time format patterns in ICU that use the pattern character 'v'.
175            // Java doesn't accept this, so we replace it with 'z' which has about the same result
176            // as 'v', the timezone name.
177            // 'v' -> "PT", 'z' -> "PST", v is the generic timezone and z the standard tz
178            // "vvvv" -> "Pacific Time", "zzzz" -> "Pacific Standard Time"
179            localeData.fullTimeFormat = localeData.fullTimeFormat.replace('v', 'z');
180        }
181        if (localeData.numberPattern != null) {
182            // The number pattern might contain positive and negative subpatterns. Arabic, for
183            // example, might look like "#,##0.###;#,##0.###-" because the minus sign should be
184            // written last. Macedonian supposedly looks something like "#,##0.###;(#,##0.###)".
185            // (The negative subpattern is optional, though, and not present in most locales.)
186            // By only swallowing '#'es and ','s after the '.', we ensure that we don't
187            // accidentally eat too much.
188            localeData.integerPattern = localeData.numberPattern.replaceAll("\\.[#,]*", "");
189        }
190        return localeData;
191    }
192}
193