@ -27,7 +27,8 @@ import java.util.*;
import static java.util.Calendar.* ;
public abstract class DateUtils {
public abstract class DateUtils
{
private static Long fixedLocalTime = null ;
@ -38,7 +39,8 @@ public abstract class DateUtils {
/ * *
* Time of the day when the new day starts .
* /
public static final int NEW_DAY_OFFSET = - 9 ;
public static /*final*/ int NEW_DAY_OFFSET = 3 ;
public static /*final*/ int FIRST_WEEK_DAY = 7 ;
/ * *
* Number of milliseconds in one day .
@ -50,32 +52,38 @@ public abstract class DateUtils {
* /
public static final long HOUR_LENGTH = 60 * 60 * 1000 ;
public static long applyTimezone ( long localTimestamp ) {
public static long applyTimezone ( long localTimestamp )
{
TimeZone tz = getTimezone ( ) ;
return localTimestamp - tz . getOffset ( localTimestamp - tz . getOffset ( localTimestamp ) ) ;
}
public static String formatHeaderDate ( GregorianCalendar day ) {
public static String formatHeaderDate ( GregorianCalendar day )
{
Locale locale = getLocale ( ) ;
String dayOfMonth = Integer . toString ( day . get ( DAY_OF_MONTH ) ) ;
String dayOfWeek = day . getDisplayName ( DAY_OF_WEEK , SHORT , locale ) ;
return dayOfWeek + "\n" + dayOfMonth ;
}
private static GregorianCalendar getCalendar ( long timestamp ) {
private static GregorianCalendar getCalendar ( long timestamp )
{
GregorianCalendar day =
new GregorianCalendar ( TimeZone . getTimeZone ( "GMT" ) , getLocale ( ) ) ;
day . setTimeInMillis ( timestamp ) ;
day . setFirstDayOfWeek ( FIRST_WEEK_DAY ) ;
return day ;
}
private static String [ ] getDayNames ( int format ) {
private static String [ ] getDayNames ( int format )
{
String [ ] wdays = new String [ 7 ] ;
Calendar day = new GregorianCalendar ( ) ;
day . set ( DAY_OF_WEEK , Calendar . SATURDAY ) ;
for ( int i = 0 ; i < wdays . length ; i + + ) {
for ( int i = 0 ; i < wdays . length ; i + + )
{
wdays [ i ] =
day . getDisplayName ( DAY_OF_WEEK , format , getLocale ( ) ) ;
day . add ( DAY_OF_MONTH , 1 ) ;
@ -84,7 +92,8 @@ public abstract class DateUtils {
return wdays ;
}
public static long getLocalTime ( ) {
public static long getLocalTime ( )
{
if ( fixedLocalTime ! = null ) return fixedLocalTime ;
TimeZone tz = getTimezone ( ) ;
@ -96,12 +105,16 @@ public abstract class DateUtils {
* @return array with weekday names starting according to locale settings ,
* e . g . [ Mo , Di , Mi , Do , Fr , Sa , So ] in Germany
* /
public static String [ ] getLocaleDayNames ( int format , int firstWeekDay ) {
public static String [ ] getLocaleDayNames ( int format )
{
String [ ] days = new String [ 7 ] ;
Calendar calendar = new GregorianCalendar ( ) ;
calendar . set ( DAY_OF_WEEK , firstWeekDay ) ;
for ( int i = 0 ; i < days . length ; i + + ) {
calendar . setFirstDayOfWeek ( FIRST_WEEK_DAY ) ;
calendar . set ( DAY_OF_WEEK , calendar . getFirstDayOfWeek ( ) ) ;
for ( int i = 0 ; i < days . length ; i + + )
{
days [ i ] = calendar . getDisplayName ( DAY_OF_WEEK , format ,
getLocale ( ) ) ;
calendar . add ( DAY_OF_MONTH , 1 ) ;
@ -114,86 +127,104 @@ public abstract class DateUtils {
* @return array with week days numbers starting according to locale
* settings , e . g . [ 2 , 3 , 4 , 5 , 6 , 7 , 1 ] in Europe
* /
public static Integer [ ] getLocaleWeekdayList ( ) {
public static Integer [ ] getLocaleWeekdayList ( )
{
Integer [ ] dayNumbers = new Integer [ 7 ] ;
Calendar calendar = new GregorianCalendar ( ) ;
calendar . setFirstDayOfWeek ( FIRST_WEEK_DAY ) ;
calendar . set ( DAY_OF_WEEK , calendar . getFirstDayOfWeek ( ) ) ;
calendar . set ( DAY_OF_WEEK , MONDAY ) ; // NOT RESPONSIBLE
for ( int i = 0 ; i < dayNumbers . length ; i + + ) {
for ( int i = 0 ; i < dayNumbers . length ; i + + )
{
dayNumbers [ i ] = calendar . get ( DAY_OF_WEEK ) ;
calendar . add ( DAY_OF_MONTH , 1 ) ;
}
return dayNumbers ;
}
public static String [ ] getLongDayNames ( ) {
public static String [ ] getLongDayNames ( )
{
return getDayNames ( GregorianCalendar . LONG ) ;
}
public static String [ ] getShortDayNames ( ) {
public static String [ ] getShortDayNames ( )
{
return getDayNames ( SHORT ) ;
}
@NonNull
public static Timestamp getToday ( ) {
public static Timestamp getToday ( )
{
return new Timestamp ( getStartOfToday ( ) ) ;
}
public static long getStartOfDay ( long timestamp ) {
public static long getStartOfDay ( long timestamp )
{
return ( timestamp / DAY_LENGTH ) * DAY_LENGTH ;
}
public static long getStartOfToday ( ) {
public static long getStartOfToday ( )
{
return getStartOfDay ( getLocalTime ( ) - NEW_DAY_OFFSET * HOUR_LENGTH ) ;
}
public static long millisecondsUntilTomorrow ( ) {
public static long millisecondsUntilTomorrow ( )
{
return getStartOfToday ( ) + DAY_LENGTH -
( getLocalTime ( ) - NEW_DAY_OFFSET * HOUR_LENGTH ) ;
}
public static GregorianCalendar getStartOfTodayCalendar ( ) {
public static GregorianCalendar getStartOfTodayCalendar ( )
{
return getCalendar ( getStartOfToday ( ) ) ;
}
private static TimeZone getTimezone ( ) {
if ( fixedTimeZone ! = null ) return fixedTimeZone ;
private static TimeZone getTimezone ( )
{
if ( fixedTimeZone ! = null ) return fixedTimeZone ;
return TimeZone . getDefault ( ) ;
}
public static void setFixedTimeZone ( TimeZone tz ) {
public static void setFixedTimeZone ( TimeZone tz )
{
fixedTimeZone = tz ;
}
public static long removeTimezone ( long timestamp ) {
public static long removeTimezone ( long timestamp )
{
TimeZone tz = getTimezone ( ) ;
return timestamp + tz . getOffset ( timestamp ) ;
}
public static void setFixedLocalTime ( Long timestamp ) {
public static void setFixedLocalTime ( Long timestamp )
{
fixedLocalTime = timestamp ;
}
public static void setFixedLocale ( Locale locale ) {
public static void setFixedLocale ( Locale locale )
{
fixedLocale = locale ;
}
private static Locale getLocale ( ) {
if ( fixedLocale ! = null ) return fixedLocale ;
private static Locale getLocale ( )
{
if ( fixedLocale ! = null ) return fixedLocale ;
return Locale . getDefault ( ) ;
}
public static Long truncate ( TruncateField field , long timestamp ) {
public static Long truncate ( TruncateField field , long timestamp )
{
GregorianCalendar cal = DateUtils . getCalendar ( timestamp ) ;
cal . setFirstDayOfWeek ( FIRST_WEEK_DAY ) ;
switch ( field ) {
switch ( field )
{
case MONTH :
cal . set ( DAY_OF_MONTH , 1 ) ;
return cal . getTimeInMillis ( ) ;
case WEEK_NUMBER :
int firstWeekday = cal . getFirstDayOfWeek ( ) ;
int firstDayOfWeek = cal . getFirstDayOfWeek ( ) ;
int firstWeekday = firstDayOfWeek ;
int weekday = cal . get ( DAY_OF_WEEK ) ;
int delta = weekday - firstWeekday ;
if ( delta < 0 ) delta + = 7 ;
@ -216,7 +247,20 @@ public abstract class DateUtils {
}
}
public enum TruncateField {
public enum TruncateField
{
MONTH , WEEK_NUMBER , YEAR , QUARTER
}
}
public static void setNewDayOffset ( int offset ) {
NEW_DAY_OFFSET = offset ;
}
public static void setFirstWeekDay ( int firstWeekDay ) {
FIRST_WEEK_DAY = firstWeekDay ;
}
}
Name
8 years ago