java.lang.Object
- org.apache.groovy.dateutil.extensions.DateUtilExtensions

```
public class DateUtilExtensions
extends Object
```
This class defines new groovy methods which appear on normal JDK Date and Calendar classes inside the Groovy environment.

Constructor Summary

Constructors
Constructor Description

DateUtilExtensions()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Date`	`clearTime(Date self)`	Clears the time portion of this java.sql.Date instance; useful utility where it makes sense to compare month/day/year only portions of a Date.
`static Calendar`	`clearTime(Calendar self)`	Clears the time portion of this Calendar instance; useful utility where it makes sense to compare month/day/year only portions of a Calendar.
`static Date`	`clearTime(Date self)`	Clears the time portion of this Date instance; useful utility where it makes sense to compare month/day/year only portions of a Date.
`static Calendar`	`copyWith(Calendar self, Map<Object,Integer> updates)`	Support creating a new Date having similar properties to an existing Date (which remains unaltered) but with some fields updated according to a Map of changes.
`static Date`	`copyWith(Date self, Map<Object,Integer> updates)`	Support creating a new Date having similar properties to an existing Date (which remains unaltered) but with some fields updated according to a Map of changes.
`static void`	`downto(Calendar self, Calendar to, Closure closure)`	Iterates from the date represented by this calendar up to the date represented by the given calendar, inclusive, incrementing by one day each time.
`static void`	`downto(Date self, Date to, Closure closure)`	Iterates from this date down to the given date, inclusive, decrementing by one day each time.
`static String`	`format(Calendar self, String pattern)`	Shortcut for `SimpleDateFormat` to output a String representation of this calendar instance.
`static String`	`format(Date self, String format)`	Create a String representation of this date according to the given format pattern.
`static String`	`format(Date self, String format, TimeZone tz)`	Create a String representation of this date according to the given format pattern and timezone.
`static int`	`getAt(Calendar self, int field)`	Support the subscript operator for a Calendar.
`static int`	`getAt(Date self, int field)`	Support the subscript operator for a Date.
`static String`	`getDateString(Date self)`	Return a string representation of the 'day' portion of this date according to the locale-specific `DateFormat.SHORT` default format.
`static String`	`getDateTimeString(Date self)`	Return a string representation of the date and time time portion of this Date instance, according to the locale-specific format used by `DateFormat`.
`static String`	`getTimeString(Date self)`	Return a string representation of the time portion of this date according to the locale-specific `DateFormat.MEDIUM` default format.
`static Date`	`minus(Date self, int days)`	Subtract a number of days from this date and returns the new date.
`static Timestamp`	`minus(Timestamp self, int days)`	Subtract a number of days from this Timestamp and returns the new Timestamp object.
`static int`	`minus(Calendar self, Calendar then)`	Subtract another date from this one and return the number of days of the difference.
`static Date`	`minus(Date self, int days)`	Subtract a number of days from this date and returns the new date.
`static int`	`minus(Date self, Date then)`	Subtract another Date from this one and return the number of days of the difference.
`static Date`	`next(Date self)`	Increment a java.sql.Date by one day.
`static Calendar`	`next(Calendar self)`	Increment a Calendar by one day.
`static Date`	`next(Date self)`	Increment a Date by one day.
`static Date`	`plus(Date self, int days)`	Add a number of days to this date and returns the new date.
`static Timestamp`	`plus(Timestamp self, int days)`	Add number of days to this Timestamp and returns the new Timestamp object.
`static Date`	`plus(Date self, int days)`	Add a number of days to this date and returns the new date.
`static Date`	`previous(Date self)`	Decrement a java.sql.Date by one day.
`static Calendar`	`previous(Calendar self)`	Decrement a Calendar by one day.
`static Date`	`previous(Date self)`	Decrement a Date by one day.
`static void`	`putAt(Calendar self, int field, int value)`	Support the subscript operator for mutating a Calendar.
`static void`	`putAt(Date self, int field, int value)`	Support the subscript operator for mutating a Date.
`static void`	`set(Calendar self, Map<Object,Integer> updates)`	Support mutating a Calendar with a Map.
`static void`	`set(Date self, Map<Object,Integer> updates)`	Support mutating a Date with a Map.
`static Calendar`	`toCalendar(Date self)`	Convert a Date to a Calendar.
`static Calendar`	`updated(Calendar self, Map<Object,Integer> updates)`	Legacy alias for copyWith.
`static Date`	`updated(Date self, Map<Object,Integer> updates)`	Legacy alias for copyWith.
`static void`	`upto(Calendar self, Calendar to, Closure closure)`	Iterates from the date represented by this calendar up to the date represented by the given calendar, inclusive, incrementing by one day each time.
`static void`	`upto(Date self, Date to, Closure closure)`	Iterates from this date up to the given date, inclusive, incrementing by one day each time.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- DateUtilExtensions
```
public DateUtilExtensions()
```

Method Detail

getAt
```
public static int getAt(Date self,
                        int field)
```
Support the subscript operator for a Date.

Parameters:

self - a Date

field - a Calendar field, e.g. MONTH

Returns:

the value for the given field, e.g. FEBRUARY

Since:

1.5.5

See Also:

Calendar

toCalendar
```
public static Calendar toCalendar(Date self)
```
Convert a Date to a Calendar.

Parameters:

self - a Date

Returns:

a Calendar corresponding to the given Date

Since:

1.7.6

getAt
```
public static int getAt(Calendar self,
                        int field)
```
Support the subscript operator for a Calendar.

Parameters:

self - a Calendar

field - a Calendar field, e.g. MONTH

Returns:

the value for the given field, e.g. FEBRUARY

Since:

1.7.3

See Also:

Calendar

putAt

public static void putAt(Calendar self,
                         int field,
                         int value)

Support the subscript operator for mutating a Calendar. Example usage:

 import static java.util.Calendar.*
 def cal = Calendar.instance
 cal[DAY_OF_WEEK] = MONDAY
 cal[MONTH] = MARCH
 println cal.time // A Monday in March

Parameters:: self - A Calendar; field - A Calendar field, e.g. MONTH; value - The value for the given field, e.g. FEBRUARY
Since:: 1.7.3
See Also:: Calendar.set(int, int)

putAt
```
public static void putAt(Date self,
                         int field,
                         int value)
```
Support the subscript operator for mutating a Date.

Parameters:

self - A Date

field - A Calendar field, e.g. MONTH

value - The value for the given field, e.g. FEBRUARY

Since:

1.7.3

See Also:

putAt(java.util.Calendar, int, int), Calendar.set(int, int)

set

public static void set(Calendar self,
                       Map<Object,Integer> updates)

Support mutating a Calendar with a Map.

The map values are the normal values provided as the second parameter to java.util.Calendar#set(int, int). The keys can either be the normal fields values provided as the first parameter to that method or one of the following Strings:

Calendar index values
year	Calendar.YEAR
month	Calendar.MONTH
date	Calendar.DATE
dayOfMonth	Calendar.DATE
hourOfDay	Calendar.HOUR_OF_DAY
minute	Calendar.MINUTE
second	Calendar.SECOND

Example usage:

 import static java.util.Calendar.*
 def cal = Calendar.instance
 def m = [:]
 m[YEAR] = 2010
 m[MONTH] = DECEMBER
 m[DATE] = 25
 cal.set(m)
 println cal.time // Christmas 2010

 cal.set(year:2011, month:DECEMBER, date:25)
 println cal.time // Christmas 2010

Parameters:: self - A Calendar; updates - A Map of Calendar keys and values
Since:: 1.7.3
See Also:: Calendar.set(int, int), Calendar.set(int, int, int, int, int, int)

updated
```
public static Calendar updated(Calendar self,
                               Map<Object,Integer> updates)
```
Legacy alias for copyWith. Will be deprecated and removed in future versions of Groovy.

Since:

1.7.3

See Also:

copyWith(java.util.Calendar, java.util.Map)

copyWith
```
public static Calendar copyWith(Calendar self,
                                Map<Object,Integer> updates)
```
Support creating a new Date having similar properties to an existing Date (which remains unaltered) but with some fields updated according to a Map of changes.
Example usage:
```
 import static java.util.Calendar.YEAR
 def now = Calendar.instance
 def nextYear = now[YEAR] + 1
 def oneYearFromNow = now.copyWith(year: nextYear)
 println now.time
 println oneYearFromNow.time
 
```
Parameters:

self - A Calendar

updates - A Map of Calendar keys and values

Returns:

The newly created Calendar

Since:

2.2.0

See Also:

Calendar.set(int, int), Calendar.set(int, int, int, int, int, int), set(java.util.Calendar, java.util.Map)

set

public static void set(Date self,
                       Map<Object,Integer> updates)

Support mutating a Date with a Map.

The map values are the normal values provided as the second parameter to java.util.Calendar#set(int, int). The keys can either be the normal fields values provided as the first parameter to that method or one of the following Strings:

Calendar index values
year	Calendar.YEAR
month	Calendar.MONTH
date	Calendar.DATE
dayOfMonth	Calendar.DATE
hourOfDay	Calendar.HOUR_OF_DAY
minute	Calendar.MINUTE
second	Calendar.SECOND

Example usage:

 import static java.util.Calendar.YEAR
 def date = new Date()
 def nextYear = date[YEAR] + 1
 date.set(year: nextYear)
 println date

Parameters:: self - A Date; updates - A Map of Calendar keys and values
Since:: 1.7.3
See Also:: Calendar.set(int, int), set(java.util.Calendar, java.util.Map)

updated
```
public static Date updated(Date self,
                           Map<Object,Integer> updates)
```
Legacy alias for copyWith. Will be deprecated and removed in future versions of Groovy.

Since:

1.7.3

See Also:

copyWith(java.util.Date, java.util.Map)

copyWith
```
public static Date copyWith(Date self,
                            Map<Object,Integer> updates)
```
Support creating a new Date having similar properties to an existing Date (which remains unaltered) but with some fields updated according to a Map of changes.
Example usage:
```
 import static java.util.Calendar.YEAR
 def today = new Date()
 def nextYear = today[YEAR] + 1
 def oneYearFromNow = today.copyWith(year: nextYear)
 println today
 println oneYearFromNow
 
```
Parameters:

self - A Date

updates - A Map of Calendar keys and values

Returns:

The newly created Date

Since:

2.2.0

See Also:

Calendar.set(int, int), set(java.util.Date, java.util.Map), copyWith(java.util.Calendar, java.util.Map)

next
```
public static Date next(Date self)
```
Increment a Date by one day.

Parameters:

self - a Date

Returns:

the next days date

Since:

1.0

next
```
public static Calendar next(Calendar self)
```
Increment a Calendar by one day.

Parameters:

self - a Calendar

Returns:

a new Calendar set to the next day

Since:

1.8.7

previous
```
public static Calendar previous(Calendar self)
```
Decrement a Calendar by one day.

Parameters:

self - a Calendar

Returns:

a new Calendar set to the previous day

Since:

1.8.7

next
```
public static Date next(Date self)
```
Increment a java.sql.Date by one day.

Parameters:

self - a java.sql.Date

Returns:

the next days date

Since:

1.0

previous
```
public static Date previous(Date self)
```
Decrement a Date by one day.

Parameters:

self - a Date

Returns:

the previous days date

Since:

1.0

previous
```
public static Date previous(Date self)
```
Decrement a java.sql.Date by one day.

Parameters:

self - a java.sql.Date

Returns:

the previous days date

Since:

1.0

plus
```
public static Date plus(Date self,
                        int days)
```
Add a number of days to this date and returns the new date.

Parameters:

self - a Date

days - the number of days to increase

Returns:

the new date

Since:

1.0

plus
```
public static Date plus(Date self,
                        int days)
```
Add a number of days to this date and returns the new date.

Parameters:

self - a java.sql.Date

days - the number of days to increase

Returns:

the new date

Since:

1.0

plus
```
public static Timestamp plus(Timestamp self,
                             int days)
```
Add number of days to this Timestamp and returns the new Timestamp object.

Parameters:

self - a Timestamp

days - the number of days to increase

Returns:

the new Timestamp

minus
```
public static Date minus(Date self,
                         int days)
```
Subtract a number of days from this date and returns the new date.

Parameters:

self - a Date

days - the number of days to subtract

Returns:

the new date

Since:

1.0

minus
```
public static Date minus(Date self,
                         int days)
```
Subtract a number of days from this date and returns the new date.

Parameters:

self - a java.sql.Date

days - the number of days to subtract

Returns:

the new date

Since:

1.0

minus
```
public static Timestamp minus(Timestamp self,
                              int days)
```
Subtract a number of days from this Timestamp and returns the new Timestamp object.

Parameters:

self - a Timestamp

days - the number of days to subtract

Returns:

the new Timestamp

minus
```
public static int minus(Calendar self,
                        Calendar then)
```
Subtract another date from this one and return the number of days of the difference.
Date self = Date then + (Date self - Date then)
IOW, if self is before then the result is a negative value.

Parameters:

self - a Calendar

then - another Calendar

Returns:

number of days

Since:

1.6.0

minus
```
public static int minus(Date self,
                        Date then)
```
Subtract another Date from this one and return the number of days of the difference.
Date self = Date then + (Date self - Date then)
IOW, if self is before then the result is a negative value.

Parameters:

self - a Date

then - another Date

Returns:

number of days

Since:

1.6.0

format
```
public static String format(Date self,
                            String format)
```
Create a String representation of this date according to the given format pattern.

For example, if the system timezone is GMT, new Date(0).format('MM/dd/yy') would return the string "01/01/70". See documentation for SimpleDateFormat for format pattern use.

Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

Parameters:

self - a Date

format - the format pattern to use according to SimpleDateFormat

Returns:

a string representation of this date.

Since:

1.5.7

See Also:

SimpleDateFormat

format
```
public static String format(Date self,
                            String format,
                            TimeZone tz)
```
Create a String representation of this date according to the given format pattern and timezone.

For example: def d = new Date(0) def tz = TimeZone.getTimeZone('GMT') println d.format('dd/MMM/yyyy', tz) would return the string "01/Jan/1970". See documentation for SimpleDateFormat for format pattern use.

Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

Parameters:

self - a Date

format - the format pattern to use according to SimpleDateFormat

tz - the TimeZone to use

Returns:

a string representation of this date.

Since:

1.8.3

See Also:

SimpleDateFormat

getDateString
```
public static String getDateString(Date self)
```
Return a string representation of the 'day' portion of this date according to the locale-specific DateFormat.SHORT default format. For an "en_UK" system locale, this would be dd/MM/yy.

Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

Parameters:

self - a Date

Returns:

a string representation of this date

Since:

1.5.7

See Also:

DateFormat.getDateInstance(int), DateFormat.SHORT

getTimeString
```
public static String getTimeString(Date self)
```
Return a string representation of the time portion of this date according to the locale-specific DateFormat.MEDIUM default format. For an "en_UK" system locale, this would be HH:MM:ss.

Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

Parameters:

self - a Date

Returns:

a string representing the time portion of this date

Since:

1.5.7

See Also:

DateFormat.getTimeInstance(int), DateFormat.MEDIUM

getDateTimeString
```
public static String getDateTimeString(Date self)
```
Return a string representation of the date and time time portion of this Date instance, according to the locale-specific format used by DateFormat. This method uses the DateFormat.SHORT preset for the day portion and DateFormat.MEDIUM for the time portion of the output string.

Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

Parameters:

self - a Date

Returns:

a string representation of this date and time

Since:

1.5.7

See Also:

DateFormat.getDateTimeInstance(int, int)

clearTime
```
public static Date clearTime(Date self)
```
Clears the time portion of this Date instance; useful utility where it makes sense to compare month/day/year only portions of a Date.

Parameters:

self - a Date

Returns:

the Date but with the time portion cleared

Since:

1.6.7

clearTime
```
public static Date clearTime(Date self)
```
Clears the time portion of this java.sql.Date instance; useful utility where it makes sense to compare month/day/year only portions of a Date.

Parameters:

self - a java.sql.Date

Returns:

the java.sql.Date but with the time portion cleared

Since:

1.6.7

clearTime
```
public static Calendar clearTime(Calendar self)
```
Clears the time portion of this Calendar instance; useful utility where it makes sense to compare month/day/year only portions of a Calendar.

Parameters:

self - a Calendar

Returns:

the Calendar but with the time portion cleared

Since:

1.6.7

format
```
public static String format(Calendar self,
                            String pattern)
```
Shortcut for SimpleDateFormat to output a String representation of this calendar instance. This method respects the Calendar's assigned TimeZone, whereas calling cal.time.format('HH:mm:ss') would use the system timezone.
Note that Calendar equivalents of date.getDateString() and variants do not exist because those methods are Locale-dependent. Although a Calendar may be assigned a Locale, that information is lost and therefore cannot be used to control the default date/time formats provided by these methods. Instead, the system Locale would always be used. The alternative is to simply call DateFormat.getDateInstance(int, java.util.Locale) and pass the same Locale that was used for the Calendar.

Parameters:

self - this calendar

pattern - format pattern

Returns:

String representation of this calendar with the given format.

Since:

1.6.0

See Also:

DateFormat.setTimeZone(java.util.TimeZone), DateFormat.format(java.util.Date), format(java.util.Date, String)

upto
```
public static void upto(Date self,
                        Date to,
                        Closure closure)
```
Iterates from this date up to the given date, inclusive, incrementing by one day each time.

Parameters:

self - a Date

to - another Date to go up to

closure - the closure to call

Since:

2.2

upto
```
public static void upto(Calendar self,
                        Calendar to,
                        Closure closure)
```
Iterates from the date represented by this calendar up to the date represented by the given calendar, inclusive, incrementing by one day each time.

Parameters:

self - a Calendar

to - another Calendar to go up to

closure - the closure to call

Since:

2.2

downto
```
public static void downto(Date self,
                          Date to,
                          Closure closure)
```
Iterates from this date down to the given date, inclusive, decrementing by one day each time.

Parameters:

self - a Date

to - another Date to go down to

closure - the closure to call

Since:

2.2

downto
```
public static void downto(Calendar self,
                          Calendar to,
                          Closure closure)
```
Iterates from the date represented by this calendar up to the date represented by the given calendar, inclusive, incrementing by one day each time.

Parameters:

self - a Calendar

to - another Calendar to go down to

closure - the closure to call

Since:

2.2

Class DateUtilExtensions

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

DateUtilExtensions

Method Detail

getAt

toCalendar

getAt

putAt

putAt

set

updated

copyWith

set

updated

copyWith

next

next

previous

next

previous

previous

plus

plus

plus

minus

minus

minus

minus

minus

format

format

getDateString

getTimeString

getDateTimeString

clearTime

clearTime

clearTime

format

upto

upto

downto

downto