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| Rev | Author | Line No. | Line |
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| 18 | jmachado | 1 | package jomm.utils; |
| 2 | |||
| 3 | import java.util.Date; |
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| 206 | jmachado | 4 | import java.text.SimpleDateFormat; |
| 18 | jmachado | 5 | |
| 6 | /** |
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| 7 | * @author Jorge Machado |
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| 8 | * @date 15/Mar/2008 |
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| 9 | * @time 15:04:18 |
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| 10 | * @see jomm.utils |
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| 11 | */ |
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| 12 | public class DatesUtils |
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| 13 | { |
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| 14 | /** |
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| 15 | * @param untilYear until Year |
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| 16 | * @param untilMonth until Month |
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| 17 | * @param untilDay until Day |
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| 18 | * @param days to go back |
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| 19 | * @return Return the start date calculating the go back days in choosed until date |
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| 20 | */ |
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| 21 | public static 5+0%2Fdocs%2Fapi+Date">Date getStartDate(int untilYear, int untilMonth, int untilDay, int days) |
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| 22 | { |
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| 23 | MyCalendar c = new MyCalendar(untilYear,untilMonth, untilDay); |
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| 24 | 5+0%2Fdocs%2Fapi+Date">Date endDate = c.getTime(); |
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| 25 | return new 5+0%2Fdocs%2Fapi+Date">Date(c.getTimeInMillis() - ((long)days * 24 * 60 * 60 * 1000)); |
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| 26 | } |
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| 27 | |||
| 28 | /** |
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| 29 | * |
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| 30 | * @param untilYear until Year |
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| 31 | * @param untilMonth until Month |
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| 32 | * @param months to go back |
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| 33 | * @return the start date going back m months. The returned date allays is placed in first day of the month |
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| 34 | */ |
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| 35 | public static 5+0%2Fdocs%2Fapi+Date">Date getStartDate(int untilYear, int untilMonth, int months) |
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| 36 | { |
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| 37 | MyCalendar c = new MyCalendar(untilYear,untilMonth, 1); |
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| 38 | int dif = untilMonth - months; |
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| 39 | if(dif == 0) |
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| 40 | { |
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| 41 | return new MyCalendar(untilYear,1,1).getTime(); |
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| 42 | } |
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| 43 | else if(dif > 0) |
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| 44 | { |
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| 45 | return new MyCalendar(untilYear,untilMonth-dif,1).getTime(); |
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| 46 | } |
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| 47 | else |
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| 48 | { |
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| 49 | int div = dif / 12; |
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| 50 | int rest = dif % 12; |
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| 51 | if(rest < 0) |
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| 52 | rest *= -1; |
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| 53 | if(div < 0) |
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| 54 | div *= -1; |
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| 55 | int year = untilYear - 1 - div; |
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| 56 | int month = 12 - rest; |
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| 57 | return new MyCalendar(year,month,1).getTime(); |
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| 58 | } |
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| 59 | } |
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| 60 | |||
| 206 | jmachado | 61 | |
| 62 | |||
| 18 | jmachado | 63 | } |