LocaleData.java revision 66e8297c70daaf001ca199e4e4ad3ba5283396d2 
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 DecimalFormatSymbols.
83    public char zeroDigit;
84    public char decimalSeparator;
85    public char groupingSeparator;
86    public char patternSeparator;
87    public char percent;
88    public char perMill;
89    public char monetarySeparator;
90    public char minusSign;
91    public String exponentSeparator;
92    public String infinity;
93    public String NaN;
94    // Also used by Currency.
95    public String currencySymbol;
96    public String internationalCurrencySymbol;
97
98    // Used by DecimalFormat and NumberFormat.
99    public String numberPattern;
100    public String integerPattern;
101    public String currencyPattern;
102    public String percentPattern;
103
104    private LocaleData() {
105    }
106
107    /**
108     * Returns a shared LocaleData for the given locale.
109     */
110    public static LocaleData get(Locale locale) {
111        if (locale == null) {
112            locale = Locale.getDefault();
113        }
114        String localeName = locale.toString();
115        synchronized (localeDataCache) {
116            LocaleData localeData = localeDataCache.get(localeName);
117            if (localeData != null) {
118                return localeData;
119            }
120        }
121        LocaleData newLocaleData = initLocaleData(locale);
122        synchronized (localeDataCache) {
123            LocaleData localeData = localeDataCache.get(localeName);
124            if (localeData != null) {
125                return localeData;
126            }
127            localeDataCache.put(localeName, newLocaleData);
128            return newLocaleData;
129        }
130    }
131
132    @Override public String toString() {
133        return Objects.toString(this);
134    }
135
136    public String getDateFormat(int style) {
137        switch (style) {
138        case DateFormat.SHORT:
139            return shortDateFormat;
140        case DateFormat.MEDIUM:
141            return mediumDateFormat;
142        case DateFormat.LONG:
143            return longDateFormat;
144        case DateFormat.FULL:
145            return fullDateFormat;
146        }
147        throw new AssertionError();
148    }
149
150    public String getTimeFormat(int style) {
151        switch (style) {
152        case DateFormat.SHORT:
153            return shortTimeFormat;
154        case DateFormat.MEDIUM:
155            return mediumTimeFormat;
156        case DateFormat.LONG:
157            return longTimeFormat;
158        case DateFormat.FULL:
159            return fullTimeFormat;
160        }
161        throw new AssertionError();
162    }
163
164    private static LocaleData initLocaleData(Locale locale) {
165        LocaleData localeData = new LocaleData();
166        if (!ICU.initLocaleDataImpl(locale.toString(), localeData)) {
167            throw new AssertionError("couldn't initialize LocaleData for locale " + locale);
168        }
169        if (localeData.fullTimeFormat != null) {
170            // There are some full time format patterns in ICU that use the pattern character 'v'.
171            // Java doesn't accept this, so we replace it with 'z' which has about the same result
172            // as 'v', the timezone name.
173            // 'v' -> "PT", 'z' -> "PST", v is the generic timezone and z the standard tz
174            // "vvvv" -> "Pacific Time", "zzzz" -> "Pacific Standard Time"
175            localeData.fullTimeFormat = localeData.fullTimeFormat.replace('v', 'z');
176        }
177        if (localeData.numberPattern != null) {
178            // The number pattern might contain positive and negative subpatterns. Arabic, for
179            // example, might look like "#,##0.###;#,##0.###-" because the minus sign should be
180            // written last. Macedonian supposedly looks something like "#,##0.###;(#,##0.###)".
181            // (The negative subpattern is optional, though, and not present in most locales.)
182            // By only swallowing '#'es and ','s after the '.', we ensure that we don't
183            // accidentally eat too much.
184            localeData.integerPattern = localeData.numberPattern.replaceAll("\\.[#,]*", "");
185        }
186        return localeData;
187    }
188}
189