source: trunk/grails-app/services/DateUtilService.groovy @ 967

Last change on this file since 967 was 638, checked in by gav, 9 years ago

Comment to DateUtilService? class.

File size: 5.9 KB
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1import org.codehaus.groovy.runtime.TimeCategory
2// the above will be deprecated and replaced by: groovy.time.TimeCategory
3/// @todo: consider moving this to org.gnumims.DateUtil
4/// pros: easy to use in domain classes.
5/// cons: have to import so pulls in all referenced imports? Injection probably does that anyway.
6
7/**
8* Provides some convenience methods for working with dates.
9*/
10class DateUtilService {
11
12    boolean transactional = false
13    //static scope = "request"
14
15    /**
16    * Get the start of today.
17     * Can be call as dateUtilService.today or dateUtilService.getToday().
18     * @returns A Date object with today's date and all time fields set to 0.
19    */
20    public static Date getToday() {
21        return getMidnight(new Date())
22    }
23
24    /**
25    * Get the start of tomorrow.
26     * Can be call as dateUtilService.tomorrow or dateUtilService.getTomorrow().
27     * @returns A Date object with tomorrow's date and all time fields set to 0.
28    */
29    public static Date getTomorrow() {
30        return (getToday() + 1) as Date
31    }
32
33    /**
34    * Get the start of yesterday.
35     * Can be call as dateUtilService.yesterday or dateUtilService.getYesterday().
36     * @returns A Date object with yesterday's date and all time fields set to 0.
37    */
38    public static Date getYesterday() {
39        return (getToday() - 1) as Date
40    }
41
42    /**
43    * Get the start of the day one week ago.
44     * Can be call as dateUtilService.oneWeekAgo or dateUtilService.getOneWeekAgo().
45     * @returns A Date object with the date one week ago and all time fields set to 0.
46    */
47    public static Date getOneWeekAgo() {
48        return (getToday() - 7) as Date
49    }
50
51    /**
52    * Get the start of the day one week ago.
53     * Can be call as dateUtilService.oneWeekAgo or dateUtilService.getOneWeekAgo().
54     * @returns A Date object with the date one week ago and all time fields set to 0.
55    */
56    public static Date getOneWeekFromNow() {
57        return (getToday() + 7) as Date
58    }
59
60    /**
61    * Get the start of a given date by setting all time fields to 0.
62    * The Calendar.getInstance() or Calendar.instance factory returns a new calendar instance, usually
63    * a Gregorian calendar but using Calendar we don't have to worry about those details.
64    * The time fields are then set to zero and cal.getTime() or cal.time returns a java.util.Date object.
65    * @param date The Date object to start with.
66    * @returns A Date object having the given date and all time fields set to 0, so the very start of the given day.
67    */
68    public static Date getMidnight(Date date) {
69        Calendar cal = Calendar.instance
70        cal.setTime(date)
71        cal.set(Calendar.HOUR_OF_DAY, 0)
72        cal.set(Calendar.MINUTE, 0)
73        cal.set(Calendar.SECOND, 0)
74        cal.set(Calendar.MILLISECOND, 0)
75        cal.time
76    }
77
78    /**
79    * Get the date plus x weeks.
80    * @param date The Date object to start with, defaults to today.
81    * @param plusYears The number of weeks to add, defaults to 1.
82    * @returns A Date object adjusted by x weeks.
83    */
84    public static Date plusWeek(Date date = new Date(), Integer plusWeeks = 1) {
85        use(TimeCategory) {
86            date + plusWeeks.weeks
87        }
88    }
89
90    /**
91    * Get the date plus x months.
92    * @param date The Date object to start with, defaults to today.
93    * @param plusYears The number of months to add, defaults to 1.
94    * @returns A Date object adjusted by x months.
95    */
96    public static Date plusMonth(Date date = new Date(), Integer plusMonths = 1) {
97        use(TimeCategory) {
98            date + plusMonths.months
99        }
100    }
101
102    /**
103    * Get the date plus x years.
104    * @param date The Date object to start with, defaults to today.
105    * @param plusYears The number of years to add, defaults to 1.
106    * @returns A Date object adjusted by x years.
107    */
108    public static Date plusYear(Date date = new Date(), Integer plusYears = 1) {
109        use(TimeCategory) {
110            date + plusYears.years
111        }
112    }
113
114    /**
115    * Make a date object from supplied year, month, day values.
116    * The Calendar.getInstance() or Calendar.instance factory returns a new calendar instance, usually
117    * a Gregorian calendar but using Calendar we don't have to worry about those details.
118    * The time fields are set to zero and cal.getTime() or cal.time returns a java.util.Date object.
119    * @param year The year as a string or integer.
120    * @param month The month as a string or integer, defaults to 1 (i.e. January).
121    * @param day The day as a string or integer, defaults to 1.
122    * @returns A Date object having the given date and all time fields set to 0, so the very start of the given day.
123    */
124    public static Date makeDate(year, month=1, day=1) {
125        Calendar cal = Calendar.instance
126        cal.clear()
127        // Stupid month is 0-based, grumble.
128        cal.set(year.toInteger(), month.toInteger()-1, day.toInteger())
129        cal.time
130    }
131
132    /**
133    * Get the day of month from supplied date.
134    * @param date The date to extract the day of month from.
135    * @returns An integer representing the day of the month.
136    */
137    public static Integer getDayOfMonthFromDate(Date date) {
138        Calendar cal = Calendar.instance
139        cal.setTime(date)
140        cal.get(Calendar.DAY_OF_MONTH)
141    }
142
143    /**
144    * Get the month from supplied date.
145    * @param date The date to extract the month from.
146    * @returns An integer representing the month.
147    */
148    public static Integer getMonthFromDate(Date date) {
149        Calendar cal = Calendar.instance
150        cal.setTime(date)
151        cal.get(Calendar.MONTH) + 1 // Stupid month is 0-based, grumble.
152    }
153
154    /**
155    * Get the year from supplied date.
156    * @param date The date to extract the year from.
157    * @returns An integer representing the year.
158    */
159    public static Integer getYearFromDate(Date date) {
160        Calendar cal = Calendar.instance
161        cal.setTime(date)
162        cal.get(Calendar.YEAR)
163    }
164
165} // end class
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