| 1 | /* |
| 2 | * Copyright 2001-2005 Stephen Colebourne |
| 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 | package org.joda.time.chrono; |
| 17 | |
| 18 | import java.lang.ref.WeakReference; |
| 19 | import java.text.DateFormatSymbols; |
| 20 | import java.util.WeakHashMap; |
| 21 | import java.util.Locale; |
| 22 | import java.util.TreeMap; |
| 23 | |
| 24 | import org.joda.time.DateTimeFieldType; |
| 25 | import org.joda.time.IllegalFieldValueException; |
| 26 | |
| 27 | /** |
| 28 | * Utility class used by a few of the GJDateTimeFields. |
| 29 | * |
| 30 | * @author Brian S O'Neill |
| 31 | * @since 1.0 |
| 32 | */ |
| 33 | class GJLocaleSymbols { |
| 34 | private static final int FAST_CACHE_SIZE = 64; |
| 35 | |
| 36 | private static final GJLocaleSymbols[] cFastCache = new GJLocaleSymbols[FAST_CACHE_SIZE]; |
| 37 | |
| 38 | private static WeakHashMap cCache = new WeakHashMap(); |
| 39 | |
| 40 | public static GJLocaleSymbols forLocale(Locale locale) { |
| 41 | if (locale == null) { |
| 42 | locale = Locale.getDefault(); |
| 43 | } |
| 44 | int index = System.identityHashCode(locale) & (FAST_CACHE_SIZE - 1); |
| 45 | GJLocaleSymbols symbols = cFastCache[index]; |
| 46 | if (symbols != null && symbols.iLocale.get() == locale) { |
| 47 | return symbols; |
| 48 | } |
| 49 | synchronized (cCache) { |
| 50 | symbols = (GJLocaleSymbols) cCache.get(locale); |
| 51 | if (symbols == null) { |
| 52 | symbols = new GJLocaleSymbols(locale); |
| 53 | cCache.put(locale, symbols); |
| 54 | } |
| 55 | } |
| 56 | cFastCache[index] = symbols; |
| 57 | return symbols; |
| 58 | } |
| 59 | |
| 60 | private static String[] realignMonths(String[] months) { |
| 61 | String[] a = new String[13]; |
| 62 | for (int i=1; i<13; i++) { |
| 63 | a[i] = months[i - 1]; |
| 64 | } |
| 65 | return a; |
| 66 | } |
| 67 | |
| 68 | private static String[] realignDaysOfWeek(String[] daysOfWeek) { |
| 69 | String[] a = new String[8]; |
| 70 | for (int i=1; i<8; i++) { |
| 71 | a[i] = daysOfWeek[(i < 7) ? i + 1 : 1]; |
| 72 | } |
| 73 | return a; |
| 74 | } |
| 75 | |
| 76 | private static void addSymbols(TreeMap map, String[] symbols, Integer[] integers) { |
| 77 | for (int i=symbols.length; --i>=0; ) { |
| 78 | String symbol = symbols[i]; |
| 79 | if (symbol != null) { |
| 80 | map.put(symbol, integers[i]); |
| 81 | } |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | private static void addNumerals(TreeMap map, int start, int end, Integer[] integers) { |
| 86 | for (int i=start; i<=end; i++) { |
| 87 | map.put(String.valueOf(i).intern(), integers[i]); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | private static int maxLength(String[] a) { |
| 92 | int max = 0; |
| 93 | for (int i=a.length; --i>=0; ) { |
| 94 | String s = a[i]; |
| 95 | if (s != null) { |
| 96 | int len = s.length(); |
| 97 | if (len > max) { |
| 98 | max = len; |
| 99 | } |
| 100 | } |
| 101 | } |
| 102 | return max; |
| 103 | } |
| 104 | |
| 105 | private final WeakReference iLocale; |
| 106 | |
| 107 | private final String[] iEras; |
| 108 | private final String[] iDaysOfWeek; |
| 109 | private final String[] iShortDaysOfWeek; |
| 110 | private final String[] iMonths; |
| 111 | private final String[] iShortMonths; |
| 112 | private final String[] iHalfday; |
| 113 | |
| 114 | // These map Strings to Integers. |
| 115 | private final TreeMap iParseEras; |
| 116 | private final TreeMap iParseDaysOfWeek; |
| 117 | private final TreeMap iParseMonths; |
| 118 | |
| 119 | private final int iMaxEraLength; |
| 120 | private final int iMaxDayOfWeekLength; |
| 121 | private final int iMaxShortDayOfWeekLength; |
| 122 | private final int iMaxMonthLength; |
| 123 | private final int iMaxShortMonthLength; |
| 124 | private final int iMaxHalfdayLength; |
| 125 | |
| 126 | /** |
| 127 | * @param locale must not be null |
| 128 | */ |
| 129 | private GJLocaleSymbols(Locale locale) { |
| 130 | iLocale = new WeakReference(locale); |
| 131 | |
| 132 | DateFormatSymbols dfs = new DateFormatSymbols(locale); |
| 133 | |
| 134 | iEras = dfs.getEras(); |
| 135 | iDaysOfWeek = realignDaysOfWeek(dfs.getWeekdays()); |
| 136 | iShortDaysOfWeek = realignDaysOfWeek(dfs.getShortWeekdays()); |
| 137 | iMonths = realignMonths(dfs.getMonths()); |
| 138 | iShortMonths = realignMonths(dfs.getShortMonths()); |
| 139 | iHalfday = dfs.getAmPmStrings(); |
| 140 | |
| 141 | Integer[] integers = new Integer[13]; |
| 142 | for (int i=0; i<13; i++) { |
| 143 | integers[i] = new Integer(i); |
| 144 | } |
| 145 | |
| 146 | iParseEras = new TreeMap(String.CASE_INSENSITIVE_ORDER); |
| 147 | addSymbols(iParseEras, iEras, integers); |
| 148 | if ("en".equals(locale.getLanguage())) { |
| 149 | // Include support for parsing "BCE" and "CE" if the language is |
| 150 | // English. At some point Joda-Time will need an independent set of |
| 151 | // localized symbols and not depend on java.text.DateFormatSymbols. |
| 152 | iParseEras.put("BCE", integers[0]); |
| 153 | iParseEras.put("CE", integers[1]); |
| 154 | } |
| 155 | |
| 156 | iParseDaysOfWeek = new TreeMap(String.CASE_INSENSITIVE_ORDER); |
| 157 | addSymbols(iParseDaysOfWeek, iDaysOfWeek, integers); |
| 158 | addSymbols(iParseDaysOfWeek, iShortDaysOfWeek, integers); |
| 159 | addNumerals(iParseDaysOfWeek, 1, 7, integers); |
| 160 | |
| 161 | iParseMonths = new TreeMap(String.CASE_INSENSITIVE_ORDER); |
| 162 | addSymbols(iParseMonths, iMonths, integers); |
| 163 | addSymbols(iParseMonths, iShortMonths, integers); |
| 164 | addNumerals(iParseMonths, 1, 12, integers); |
| 165 | |
| 166 | iMaxEraLength = maxLength(iEras); |
| 167 | iMaxDayOfWeekLength = maxLength(iDaysOfWeek); |
| 168 | iMaxShortDayOfWeekLength = maxLength(iShortDaysOfWeek); |
| 169 | iMaxMonthLength = maxLength(iMonths); |
| 170 | iMaxShortMonthLength = maxLength(iShortMonths); |
| 171 | iMaxHalfdayLength = maxLength(iHalfday); |
| 172 | } |
| 173 | |
| 174 | public String eraValueToText(int value) { |
| 175 | return iEras[value]; |
| 176 | } |
| 177 | |
| 178 | public int eraTextToValue(String text) { |
| 179 | Integer era = (Integer) iParseEras.get(text); |
| 180 | if (era != null) { |
| 181 | return era.intValue(); |
| 182 | } |
| 183 | throw new IllegalFieldValueException(DateTimeFieldType.era(), text); |
| 184 | } |
| 185 | |
| 186 | public int getEraMaxTextLength() { |
| 187 | return iMaxEraLength; |
| 188 | } |
| 189 | |
| 190 | public String monthOfYearValueToText(int value) { |
| 191 | return iMonths[value]; |
| 192 | } |
| 193 | |
| 194 | public String monthOfYearValueToShortText(int value) { |
| 195 | return iShortMonths[value]; |
| 196 | } |
| 197 | |
| 198 | public int monthOfYearTextToValue(String text) { |
| 199 | Integer month = (Integer) iParseMonths.get(text); |
| 200 | if (month != null) { |
| 201 | return month.intValue(); |
| 202 | } |
| 203 | throw new IllegalFieldValueException(DateTimeFieldType.monthOfYear(), text); |
| 204 | } |
| 205 | |
| 206 | public int getMonthMaxTextLength() { |
| 207 | return iMaxMonthLength; |
| 208 | } |
| 209 | |
| 210 | public int getMonthMaxShortTextLength() { |
| 211 | return iMaxShortMonthLength; |
| 212 | } |
| 213 | |
| 214 | public String dayOfWeekValueToText(int value) { |
| 215 | return iDaysOfWeek[value]; |
| 216 | } |
| 217 | |
| 218 | public String dayOfWeekValueToShortText(int value) { |
| 219 | return iShortDaysOfWeek[value]; |
| 220 | } |
| 221 | |
| 222 | public int dayOfWeekTextToValue(String text) { |
| 223 | Integer day = (Integer) iParseDaysOfWeek.get(text); |
| 224 | if (day != null) { |
| 225 | return day.intValue(); |
| 226 | } |
| 227 | throw new IllegalFieldValueException(DateTimeFieldType.dayOfWeek(), text); |
| 228 | } |
| 229 | |
| 230 | public int getDayOfWeekMaxTextLength() { |
| 231 | return iMaxDayOfWeekLength; |
| 232 | } |
| 233 | |
| 234 | public int getDayOfWeekMaxShortTextLength() { |
| 235 | return iMaxShortDayOfWeekLength; |
| 236 | } |
| 237 | |
| 238 | public String halfdayValueToText(int value) { |
| 239 | return iHalfday[value]; |
| 240 | } |
| 241 | |
| 242 | public int halfdayTextToValue(String text) { |
| 243 | String[] halfday = iHalfday; |
| 244 | for (int i = halfday.length; --i>=0; ) { |
| 245 | if (halfday[i].equalsIgnoreCase(text)) { |
| 246 | return i; |
| 247 | } |
| 248 | } |
| 249 | throw new IllegalFieldValueException(DateTimeFieldType.halfdayOfDay(), text); |
| 250 | } |
| 251 | |
| 252 | public int getHalfdayMaxTextLength() { |
| 253 | return iMaxHalfdayLength; |
| 254 | } |
| 255 | } |