| 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; |
| 17 | |
| 18 | /** |
| 19 | * DateTimeConstants is a non-instantiable class of constants used in |
| 20 | * the date time system. These are the ISO8601 constants, but should be |
| 21 | * used by all chronologies. |
| 22 | * <p> |
| 23 | * DateTimeConstants is thread-safe and immutable. |
| 24 | * |
| 25 | * @author Stephen Colebourne |
| 26 | * @author Brian S O'Neill |
| 27 | * @since 1.0 |
| 28 | */ |
| 29 | public class DateTimeConstants { |
| 30 | |
| 31 | // These are ints not enumerations as they represent genuine int values |
| 32 | /** Constant (1) representing January, the first month (ISO) */ |
| 33 | public static final int JANUARY = 1; |
| 34 | |
| 35 | /** Constant (2) representing February, the second month (ISO) */ |
| 36 | public static final int FEBRUARY = 2; |
| 37 | |
| 38 | /** Constant (3) representing March, the third month (ISO) */ |
| 39 | public static final int MARCH = 3; |
| 40 | |
| 41 | /** Constant (4) representing April, the fourth month (ISO) */ |
| 42 | public static final int APRIL = 4; |
| 43 | |
| 44 | /** Constant (5) representing May, the fifth month (ISO) */ |
| 45 | public static final int MAY = 5; |
| 46 | |
| 47 | /** Constant (6) representing June, the sixth month (ISO) */ |
| 48 | public static final int JUNE = 6; |
| 49 | |
| 50 | /** Constant (7) representing July, the seventh month (ISO) */ |
| 51 | public static final int JULY = 7; |
| 52 | |
| 53 | /** Constant (8) representing August, the eighth month (ISO) */ |
| 54 | public static final int AUGUST = 8; |
| 55 | |
| 56 | /** Constant (9) representing September, the nineth month (ISO) */ |
| 57 | public static final int SEPTEMBER = 9; |
| 58 | |
| 59 | /** Constant (10) representing October, the tenth month (ISO) */ |
| 60 | public static final int OCTOBER = 10; |
| 61 | |
| 62 | /** Constant (11) representing November, the eleventh month (ISO) */ |
| 63 | public static final int NOVEMBER = 11; |
| 64 | |
| 65 | /** Constant (12) representing December, the twelfth month (ISO) */ |
| 66 | public static final int DECEMBER = 12; |
| 67 | |
| 68 | // These are ints not enumerations as they represent genuine int values |
| 69 | /** Constant (1) representing Monday, the first day of the week (ISO) */ |
| 70 | public static final int MONDAY = 1; |
| 71 | |
| 72 | /** Constant (2) representing Tuesday, the second day of the week (ISO) */ |
| 73 | public static final int TUESDAY = 2; |
| 74 | |
| 75 | /** Constant (3) representing Wednesday, the third day of the week (ISO) */ |
| 76 | public static final int WEDNESDAY = 3; |
| 77 | |
| 78 | /** Constant (4) representing Thursday, the fourth day of the week (ISO) */ |
| 79 | public static final int THURSDAY = 4; |
| 80 | |
| 81 | /** Constant (5) representing Friday, the fifth day of the week (ISO) */ |
| 82 | public static final int FRIDAY = 5; |
| 83 | |
| 84 | /** Constant (6) representing Saturday, the sixth day of the week (ISO) */ |
| 85 | public static final int SATURDAY = 6; |
| 86 | |
| 87 | /** Constant (7) representing Sunday, the seventh day of the week (ISO) */ |
| 88 | public static final int SUNDAY = 7; |
| 89 | |
| 90 | |
| 91 | /** Constant (0) representing AM, the morning (from Calendar) */ |
| 92 | public static final int AM = 0; |
| 93 | |
| 94 | /** Constant (1) representing PM, the afternoon (from Calendar) */ |
| 95 | public static final int PM = 1; |
| 96 | |
| 97 | |
| 98 | /** Constant (0) representing BC, years before zero (from Calendar) */ |
| 99 | public static final int BC = 0; |
| 100 | /** Alternative constant (0) representing BCE, Before Common Era (secular) */ |
| 101 | public static final int BCE = 0; |
| 102 | |
| 103 | /** |
| 104 | * Constant (1) representing AD, years after zero (from Calendar). |
| 105 | * <p> |
| 106 | * All new chronologies with differrent Era values should try to assign |
| 107 | * eras as follows. The era that was in force at 1970-01-01 (ISO) is assigned |
| 108 | * the value 1. Earlier eras are assigned sequentially smaller numbers. |
| 109 | * Later eras are assigned sequentially greater numbers. |
| 110 | */ |
| 111 | public static final int AD = 1; |
| 112 | /** |
| 113 | * Alternative constant (1) representing CE, Common Era (secular). |
| 114 | * <p> |
| 115 | * All new chronologies with differrent Era values should try to assign |
| 116 | * eras as follows. The era that was in force at 1970-01-01 (ISO) is assigned |
| 117 | * the value 1. Earlier eras are assigned sequentially smaller numbers. |
| 118 | * Later eras are assigned sequentially greater numbers. |
| 119 | */ |
| 120 | public static final int CE = 1; |
| 121 | |
| 122 | |
| 123 | /** Milliseconds in one second (1000) (ISO) */ |
| 124 | public static final int MILLIS_PER_SECOND = 1000; |
| 125 | |
| 126 | /** Seconds in one minute (60) (ISO) */ |
| 127 | public static final int SECONDS_PER_MINUTE = 60; |
| 128 | /** Milliseconds in one minute (ISO) */ |
| 129 | public static final int MILLIS_PER_MINUTE = MILLIS_PER_SECOND * SECONDS_PER_MINUTE; |
| 130 | |
| 131 | /** Minutes in one hour (ISO) */ |
| 132 | public static final int MINUTES_PER_HOUR = 60; |
| 133 | /** Seconds in one hour (ISO) */ |
| 134 | public static final int SECONDS_PER_HOUR = SECONDS_PER_MINUTE * MINUTES_PER_HOUR; |
| 135 | /** Milliseconds in one hour (ISO) */ |
| 136 | public static final int MILLIS_PER_HOUR = MILLIS_PER_MINUTE * MINUTES_PER_HOUR; |
| 137 | |
| 138 | /** Hours in a typical day (24) (ISO). Due to time zone offset changes, the |
| 139 | * number of hours per day can vary. */ |
| 140 | public static final int HOURS_PER_DAY = 24; |
| 141 | /** Minutes in a typical day (ISO). Due to time zone offset changes, the number |
| 142 | * of minutes per day can vary. */ |
| 143 | public static final int MINUTES_PER_DAY = MINUTES_PER_HOUR * HOURS_PER_DAY; |
| 144 | /** Seconds in a typical day (ISO). Due to time zone offset changes, the number |
| 145 | * of seconds per day can vary. */ |
| 146 | public static final int SECONDS_PER_DAY = SECONDS_PER_HOUR * HOURS_PER_DAY; |
| 147 | /** Milliseconds in a typical day (ISO). Due to time zone offset changes, the |
| 148 | * number of milliseconds per day can vary. */ |
| 149 | public static final int MILLIS_PER_DAY = MILLIS_PER_HOUR * HOURS_PER_DAY; |
| 150 | |
| 151 | /** Days in one week (7) (ISO) */ |
| 152 | public static final int DAYS_PER_WEEK = 7; |
| 153 | /** Hours in a typical week. Due to time zone offset changes, the number of |
| 154 | * hours per week can vary. */ |
| 155 | public static final int HOURS_PER_WEEK = HOURS_PER_DAY * DAYS_PER_WEEK; |
| 156 | /** Minutes in a typical week (ISO). Due to time zone offset changes, the number |
| 157 | * of minutes per week can vary. */ |
| 158 | public static final int MINUTES_PER_WEEK = MINUTES_PER_DAY * DAYS_PER_WEEK; |
| 159 | /** Seconds in a typical week (ISO). Due to time zone offset changes, the number |
| 160 | * of seconds per week can vary. */ |
| 161 | public static final int SECONDS_PER_WEEK = SECONDS_PER_DAY * DAYS_PER_WEEK; |
| 162 | /** Milliseconds in a typical week (ISO). Due to time zone offset changes, the |
| 163 | * number of milliseconds per week can vary. */ |
| 164 | public static final int MILLIS_PER_WEEK = MILLIS_PER_DAY * DAYS_PER_WEEK; |
| 165 | |
| 166 | /** |
| 167 | * Restrictive constructor |
| 168 | */ |
| 169 | protected DateTimeConstants() { |
| 170 | } |
| 171 | |
| 172 | } |