37 * * Redistributions in binary form must reproduce the above copyright notice, 38 * this list of conditions and the following disclaimer in the documentation 39 * and/or other materials provided with the distribution. 40 * 41 * * Neither the name of JSR-310 nor the names of its contributors 42 * may be used to endorse or promote products derived from this software 43 * without specific prior written permission. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 46 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 47 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 48 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 49 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 50 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 51 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 52 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 53 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 54 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 55 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 56 */ 57 package java.time.calendar; 58 59 import static java.time.temporal.ChronoField.YEAR; 60 61 import java.io.Serializable; 62 import java.time.DateTimeException; 63 import java.time.LocalDate; 64 import java.time.temporal.Chrono; 65 import java.time.temporal.ChronoField; 66 import java.time.temporal.ChronoLocalDate; 67 import java.time.temporal.Era; 68 import java.time.temporal.ISOChrono; 69 import java.time.temporal.TemporalAccessor; 70 import java.time.temporal.ValueRange; 71 import java.util.Arrays; 72 import java.util.List; 73 import java.util.Locale; 74 75 /** 76 * The Minguo calendar system. 77 * <p> 78 * This chronology defines the rules of the Minguo calendar system. 79 * This calendar system is primarily used in the Republic of China, often known as Taiwan. 80 * Dates are aligned such that {@code 0001-01-01 (Minguo)} is {@code 1911-01-01 (ISO)}. 81 * <p> 82 * The fields are defined as follows: 83 * <p><ul> 84 * <li>era - There are two eras, the current 'Republic' (ERA_ROC) and the previous era (ERA_BEFORE_ROC). 85 * <li>year-of-era - The year-of-era for the current era increases uniformly from the epoch at year one. 86 * For the previous era the year increases from one as time goes backwards. 87 * The value for the current era is equal to the ISO proleptic-year minus 1911. 88 * <li>proleptic-year - The proleptic year is the same as the year-of-era for the 89 * current era. For the previous era, years have zero, then negative values. 90 * The value is equal to the ISO proleptic-year minus 1911. 91 * <li>month-of-year - The Minguo month-of-year exactly matches ISO. 92 * <li>day-of-month - The Minguo day-of-month exactly matches ISO. 93 * <li>day-of-year - The Minguo day-of-year exactly matches ISO. 94 * <li>leap-year - The Minguo leap-year pattern exactly matches ISO, such that the two calendars 95 * are never out of step. 96 * </ul><p> 97 * 98 * <h3>Specification for implementors</h3> 99 * This class is immutable and thread-safe. 100 * 101 * @since 1.8 102 */ 103 public final class MinguoChrono extends Chrono<MinguoChrono> implements Serializable { 104 105 /** 106 * Singleton instance for the Minguo chronology. 107 */ 108 public static final MinguoChrono INSTANCE = new MinguoChrono(); 109 110 /** 111 * The singleton instance for the era ROC. 112 */ 113 public static final Era<MinguoChrono> ERA_ROC = MinguoEra.ROC; 114 115 /** 116 * The singleton instance for the era BEFORE_ROC. 117 */ 118 public static final Era<MinguoChrono> ERA_BEFORE_ROC = MinguoEra.BEFORE_ROC; 119 120 /** 121 * Serialization version. 122 */ 123 private static final long serialVersionUID = 1039765215346859963L; 124 /** 125 * The difference in years between ISO and Minguo. 126 */ 127 static final int YEARS_DIFFERENCE = 1911; 128 129 /** 130 * Restricted constructor. 131 */ 132 private MinguoChrono() { 133 } 134 135 /** 136 * Resolve singleton. 137 * 138 * @return the singleton instance, not null 139 */ 140 private Object readResolve() { 141 return INSTANCE; 142 } 143 144 //----------------------------------------------------------------------- 145 /** 146 * Gets the ID of the chronology - 'Minguo'. 147 * <p> 148 * The ID uniquely identifies the {@code Chrono}. 149 * It can be used to lookup the {@code Chrono} using {@link #of(String)}. 150 * 151 * @return the chronology ID - 'Minguo' 152 * @see #getCalendarType() 153 */ 154 @Override 155 public String getId() { 156 return "Minguo"; 157 } 158 159 /** 160 * Gets the calendar type of the underlying calendar system - 'roc'. 161 * <p> 162 * The calendar type is an identifier defined by the 163 * <em>Unicode Locale Data Markup Language (LDML)</em> specification. 164 * It can be used to lookup the {@code Chrono} using {@link #of(String)}. 165 * It can also be used as part of a locale, accessible via 166 * {@link Locale#getUnicodeLocaleType(String)} with the key 'ca'. 167 * 168 * @return the calendar system type - 'roc' 169 * @see #getId() 170 */ 171 @Override 172 public String getCalendarType() { 173 return "roc"; 174 } 175 176 //----------------------------------------------------------------------- 177 @Override 178 public ChronoLocalDate<MinguoChrono> date(int prolepticYear, int month, int dayOfMonth) { 179 return new MinguoDate(LocalDate.of(prolepticYear + YEARS_DIFFERENCE, month, dayOfMonth)); 180 } 181 182 @Override 183 public ChronoLocalDate<MinguoChrono> dateYearDay(int prolepticYear, int dayOfYear) { 184 return new MinguoDate(LocalDate.ofYearDay(prolepticYear + YEARS_DIFFERENCE, dayOfYear)); 185 } 186 187 @Override 188 public ChronoLocalDate<MinguoChrono> date(TemporalAccessor temporal) { 189 if (temporal instanceof MinguoDate) { 190 return (MinguoDate) temporal; 191 } 192 return new MinguoDate(LocalDate.from(temporal)); 193 } 194 195 //----------------------------------------------------------------------- 196 /** 197 * Checks if the specified year is a leap year. 198 * <p> 199 * Minguo leap years occur exactly in line with ISO leap years. 200 * This method does not validate the year passed in, and only has a 201 * well-defined result for years in the supported range. 202 * 203 * @param prolepticYear the proleptic-year to check, not validated for range 204 * @return true if the year is a leap year 205 */ 206 @Override 207 public boolean isLeapYear(long prolepticYear) { 208 return ISOChrono.INSTANCE.isLeapYear(prolepticYear + YEARS_DIFFERENCE); 209 } 210 211 @Override 212 public int prolepticYear(Era<MinguoChrono> era, int yearOfEra) { 213 if (era instanceof MinguoEra == false) { 214 throw new DateTimeException("Era must be MinguoEra"); 215 } 216 return (era == MinguoEra.ROC ? yearOfEra : 1 - yearOfEra); 217 } 218 219 @Override 220 public Era<MinguoChrono> eraOf(int eraValue) { 221 return MinguoEra.of(eraValue); 222 } 223 224 @Override 225 public List<Era<MinguoChrono>> eras() { 226 return Arrays.<Era<MinguoChrono>>asList(MinguoEra.values()); 227 } 228 229 //----------------------------------------------------------------------- 230 @Override 231 public ValueRange range(ChronoField field) { 232 switch (field) { 233 case YEAR_OF_ERA: { 234 ValueRange range = YEAR.range(); 235 return ValueRange.of(1, range.getMaximum() - YEARS_DIFFERENCE, -range.getMinimum() + 1 + YEARS_DIFFERENCE); 236 } 237 case YEAR: { 238 ValueRange range = YEAR.range(); 239 return ValueRange.of(range.getMinimum() - YEARS_DIFFERENCE, range.getMaximum() - YEARS_DIFFERENCE); 240 } 241 } 242 return field.range(); 243 } 244 245 } | 37 * * Redistributions in binary form must reproduce the above copyright notice, 38 * this list of conditions and the following disclaimer in the documentation 39 * and/or other materials provided with the distribution. 40 * 41 * * Neither the name of JSR-310 nor the names of its contributors 42 * may be used to endorse or promote products derived from this software 43 * without specific prior written permission. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 46 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 47 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 48 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 49 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 50 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 51 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 52 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 53 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 54 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 55 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 56 */ 57 package java.time.chrono; 58 59 import static java.time.temporal.ChronoField.YEAR; 60 61 import java.io.Serializable; 62 import java.time.Clock; 63 import java.time.DateTimeException; 64 import java.time.Instant; 65 import java.time.LocalDate; 66 import java.time.ZoneId; 67 import java.time.temporal.ChronoField; 68 import java.time.temporal.TemporalAccessor; 69 import java.time.temporal.ValueRange; 70 import java.util.Arrays; 71 import java.util.List; 72 import java.util.Locale; 73 74 /** 75 * The Minguo calendar system. 76 * <p> 77 * This chronology defines the rules of the Minguo calendar system. 78 * This calendar system is primarily used in the Republic of China, often known as Taiwan. 79 * Dates are aligned such that {@code 0001-01-01 (Minguo)} is {@code 1912-01-01 (ISO)}. 80 * <p> 81 * The fields are defined as follows: 82 * <p><ul> 83 * <li>era - There are two eras, the current 'Republic' (ERA_ROC) and the previous era (ERA_BEFORE_ROC). 84 * <li>year-of-era - The year-of-era for the current era increases uniformly from the epoch at year one. 85 * For the previous era the year increases from one as time goes backwards. 86 * The value for the current era is equal to the ISO proleptic-year minus 1911. 87 * <li>proleptic-year - The proleptic year is the same as the year-of-era for the 88 * current era. For the previous era, years have zero, then negative values. 89 * The value is equal to the ISO proleptic-year minus 1911. 90 * <li>month-of-year - The Minguo month-of-year exactly matches ISO. 91 * <li>day-of-month - The Minguo day-of-month exactly matches ISO. 92 * <li>day-of-year - The Minguo day-of-year exactly matches ISO. 93 * <li>leap-year - The Minguo leap-year pattern exactly matches ISO, such that the two calendars 94 * are never out of step. 95 * </ul><p> 96 * 97 * <h3>Specification for implementors</h3> 98 * This class is immutable and thread-safe. 99 * 100 * @since 1.8 101 */ 102 public final class MinguoChronology extends Chronology implements Serializable { 103 104 /** 105 * Singleton instance for the Minguo chronology. 106 */ 107 public static final MinguoChronology INSTANCE = new MinguoChronology(); 108 109 /** 110 * The singleton instance for the era ROC. 111 */ 112 public static final Era ERA_ROC = MinguoEra.ROC; 113 114 /** 115 * The singleton instance for the era BEFORE_ROC. 116 */ 117 public static final Era ERA_BEFORE_ROC = MinguoEra.BEFORE_ROC; 118 119 /** 120 * Serialization version. 121 */ 122 private static final long serialVersionUID = 1039765215346859963L; 123 /** 124 * The difference in years between ISO and Minguo. 125 */ 126 static final int YEARS_DIFFERENCE = 1911; 127 128 /** 129 * Restricted constructor. 130 */ 131 private MinguoChronology() { 132 } 133 134 /** 135 * Resolve singleton. 136 * 137 * @return the singleton instance, not null 138 */ 139 private Object readResolve() { 140 return INSTANCE; 141 } 142 143 //----------------------------------------------------------------------- 144 /** 145 * Gets the ID of the chronology - 'Minguo'. 146 * <p> 147 * The ID uniquely identifies the {@code Chronology}. 148 * It can be used to lookup the {@code Chronology} using {@link #of(String)}. 149 * 150 * @return the chronology ID - 'Minguo' 151 * @see #getCalendarType() 152 */ 153 @Override 154 public String getId() { 155 return "Minguo"; 156 } 157 158 /** 159 * Gets the calendar type of the underlying calendar system - 'roc'. 160 * <p> 161 * The calendar type is an identifier defined by the 162 * <em>Unicode Locale Data Markup Language (LDML)</em> specification. 163 * It can be used to lookup the {@code Chronology} using {@link #of(String)}. 164 * It can also be used as part of a locale, accessible via 165 * {@link Locale#getUnicodeLocaleType(String)} with the key 'ca'. 166 * 167 * @return the calendar system type - 'roc' 168 * @see #getId() 169 */ 170 @Override 171 public String getCalendarType() { 172 return "roc"; 173 } 174 175 //----------------------------------------------------------------------- 176 @Override 177 public MinguoDate date(int prolepticYear, int month, int dayOfMonth) { 178 return new MinguoDate(LocalDate.of(prolepticYear + YEARS_DIFFERENCE, month, dayOfMonth)); 179 } 180 181 @Override 182 public MinguoDate dateYearDay(int prolepticYear, int dayOfYear) { 183 return new MinguoDate(LocalDate.ofYearDay(prolepticYear + YEARS_DIFFERENCE, dayOfYear)); 184 } 185 186 @Override 187 public MinguoDate date(TemporalAccessor temporal) { 188 if (temporal instanceof MinguoDate) { 189 return (MinguoDate) temporal; 190 } 191 return new MinguoDate(LocalDate.from(temporal)); 192 } 193 @Override 194 public MinguoDate date(Era era, int yearOfEra, int month, int dayOfMonth) { 195 return date(prolepticYear(era, yearOfEra), month, dayOfMonth); 196 197 } 198 199 @Override 200 public MinguoDate dateYearDay(Era era, int yearOfEra, int dayOfYear) { 201 return dateYearDay(prolepticYear(era, yearOfEra), dayOfYear); 202 } 203 204 @Override 205 public MinguoDate dateNow() { 206 return dateNow(Clock.systemDefaultZone()); 207 } 208 209 @Override 210 public MinguoDate dateNow(ZoneId zone) { 211 return dateNow(Clock.system(zone)); 212 } 213 214 @Override 215 public MinguoDate dateNow(Clock clock) { 216 return date(LocalDate.now(clock)); 217 } 218 219 @Override 220 public ChronoLocalDateTime<MinguoDate> localDateTime(TemporalAccessor temporal) { 221 return (ChronoLocalDateTime<MinguoDate>)super.localDateTime(temporal); 222 } 223 224 @Override 225 public ChronoZonedDateTime<MinguoDate> zonedDateTime(TemporalAccessor temporal) { 226 return (ChronoZonedDateTime<MinguoDate>)super.zonedDateTime(temporal); 227 } 228 229 @Override 230 public ChronoZonedDateTime<MinguoDate> zonedDateTime(Instant instant, ZoneId zone) { 231 return (ChronoZonedDateTime<MinguoDate>)super.zonedDateTime(instant, zone); 232 } 233 234 //----------------------------------------------------------------------- 235 /** 236 * Checks if the specified year is a leap year. 237 * <p> 238 * Minguo leap years occur exactly in line with ISO leap years. 239 * This method does not validate the year passed in, and only has a 240 * well-defined result for years in the supported range. 241 * 242 * @param prolepticYear the proleptic-year to check, not validated for range 243 * @return true if the year is a leap year 244 */ 245 @Override 246 public boolean isLeapYear(long prolepticYear) { 247 return IsoChronology.INSTANCE.isLeapYear(prolepticYear + YEARS_DIFFERENCE); 248 } 249 250 @Override 251 public int prolepticYear(Era era, int yearOfEra) { 252 if (era instanceof MinguoEra == false) { 253 throw new DateTimeException("Era must be MinguoEra"); 254 } 255 return (era == MinguoEra.ROC ? yearOfEra : 1 - yearOfEra); 256 } 257 258 @Override 259 public Era eraOf(int eraValue) { 260 return MinguoEra.of(eraValue); 261 } 262 263 @Override 264 public List<Era> eras() { 265 return Arrays.<Era>asList(MinguoEra.values()); 266 } 267 268 //----------------------------------------------------------------------- 269 @Override 270 public ValueRange range(ChronoField field) { 271 switch (field) { 272 case YEAR_OF_ERA: { 273 ValueRange range = YEAR.range(); 274 return ValueRange.of(1, range.getMaximum() - YEARS_DIFFERENCE, -range.getMinimum() + 1 + YEARS_DIFFERENCE); 275 } 276 case YEAR: { 277 ValueRange range = YEAR.range(); 278 return ValueRange.of(range.getMinimum() - YEARS_DIFFERENCE, range.getMaximum() - YEARS_DIFFERENCE); 279 } 280 } 281 return field.range(); 282 } 283 284 } |