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[Calendar/When/Ruby/2.APIの使用例/9.標準クラスとの変換/コア拡張] (前:9.標準クラスとの変換|次:A.初期設定) (English)

☆コア拡張☆

コアクラスを require 'when_exe/core/extension' で拡張した場合の記法を確認

準備

 require 'date'
 require 'when_exe'
 require 'when_exe/core/extension'
 include When

標準クラスからの変換

Dateクラス

 sdate = Date.new(1582,10,15)
 p sdate                                     #=> #<Date: 1582-10-15 ((2299161j,0s,0n),+0s,2299161j)>
 gdate = sdate.tm_pos
 p gdate                                     #=> 1582-10-15
 p gdate.class                               #=> When::TM::CalDate
 p gdate.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Civil?reform_jdn=2299161"
 sdate = Date.new(1582,10,4)
 p sdate                                     #=> #<Date: 1582-10-04 ((2299160j,0s,0n),+0s,2299161j)>
 jdate = sdate.tm_pos
 p jdate                                     #=> 1582-10-04
 p jdate.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Civil?reform_jdn=2299161"
 gdate = sdate.tm_pos(:frame=>'Gregorian')
 p gdate                                     #=> 1582-10-14
 p gdate.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Gregorian"

Timeクラス

UTC

 stime = Time.utc(2013, 5 ,30, 16, 20, 45)
 p stime                                     #=> 2013-05-30 16:20:45 UTC
 gtime = stime.tm_pos
 p gtime                                     #=> 2013-05-30T16:20:45.00Z
 p gtime.class                               #=> When::TM::DateAndTime
 p gtime.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Gregorian"
 p gtime.clock.iri                           #=> "http://hosi.org/When/CalendarTypes/UTC"

ローカル時刻

 stime = Time.local(2013, 5 ,30, 16, 20, 45)
 p stime                                     #=> 2013-05-30 16:20:45 +0900
 gtime = stime.tm_pos
 p gtime                                     #=> 2013-05-30T16:20:45.00+09:00
 p gtime.class                               #=> When::TM::DateAndTime
 p gtime.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Gregorian"
 p gtime.clock.iri                           #=> "http://hosi.org/When/TM/Clock?label=+09:00"

Date Timeクラス

UTC

 sdate = DateTime.new(2013, 5 ,30, 16, 20, 45)
 p sdate                                     #=> #<DateTime: 2013-05-30T16:20:45+00:00 ((2456443j,58845s,0n),+0s,2299161j)>
 gdate = sdate.tm_pos
 p gdate                                     #=> 2013-05-30T16:20:45.00Z
 p gdate.class                               #=> When::TM::DateAndTime
 p gdate.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Civil?reform_jdn=2299161"
 p gdate.clock.iri                           #=> "http://hosi.org/When/CalendarTypes/UTC"

ローカル時刻

 sdate = DateTime.new(2013, 5 ,30, 16, 20, 45, 0.375)
 p sdate                                     #=> #<DateTime: 2013-05-30T16:20:45+09:00 ((2456443j,26445s,0n),+32400s,2299161j)>
 gdate = sdate.tm_pos
 p gdate                                     #=> 2013-05-30T16:20:45.00+09:00
 p gdate.class                               #=> When::TM::DateAndTime
 p gdate.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Civil?reform_jdn=2299161"
 p gdate.clock.iri                           #=> "http://hosi.org/When/TM/Clock?label=+09:00"

標準クラスへの変換

Dateクラス

 gdate = '1582-10-15'.when?
 p gdate                                     #=> 1582-10-15
 p gdate.class                               #=> When::TM::CalDate
 p gdate.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Gregorian"
 sdate = gdate.to_date
 p sdate                                     #=> #<Date: 1582-10-15 ((2299161j,0s,0n),+0s,-Infj)>
 gdate = '1582-10-04'.when?(:frame=>'Julian')
 p gdate                                     #=> 1582-10-04
 p gdate.class                               #=> When::TM::CalDate
 p gdate.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Julian"
 sdate = gdate.to_date
 p sdate                                     #=> #<Date: 1582-10-14 ((2299160j,0s,0n),+0s,-Infj)>

to_date による変換結果は原則としてグレゴリオ暦だが、変換元がCivilのユリウス暦期間かまたはJulianの場合のみユリウス暦

Timeクラス

UTC

 gtime = '2013-05-30T16:20:45'.when?
 p gtime                                     #=> 2013-05-30T16:20:45Z
 p gtime.class                               #=> When::TM::DateAndTime
 p gtime.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Gregorian"
 p gtime.clock.iri                           #=> "http://hosi.org/When/CalendarTypes/UTC"
 stime = gtime.to_time
 p stime                                     #=> 2013-05-31 01:20:45 +0900

ローカル時刻

 if Object.const_defined?(:TZInfo) # TZInfo gem がインストールされていること
   gtime = '2013-05-30T16:20:45'.when?(:tz=>'Asia/Tokyo')
   p gtime                                   #=> 2013-05-30T16:20:45+09:00
   p gtime.class                             #=> When::TM::DateAndTime
   p gtime.frame.iri                         #=> "http://hosi.org/When/CalendarTypes/Gregorian"
   p gtime.clock.tz_prop.timezone            #=> #<TZInfo::DataTimezone: Asia/Tokyo>
   stime = gtime.to_time
   p stime                                   #=> 2013-05-30 16:20:45 +0900
 end
to_time による変換結果は常にローカル時刻である

Date Timeクラス

UTC

 gdate = '2013-05-30T16:20:45'.when?
 p gdate                                     #=> 2013-05-30T16:20:45Z
 p gdate.class                               #=> When::TM::DateAndTime
 p gdate.frame.iri                           #=> "http://hosi.org/When/CalendarTypes/Gregorian"
 p gdate.clock.iri                           #=> "http://hosi.org/When/CalendarTypes/UTC"
 sdate = gdate.to_datetime
 p sdate                                     #=> #<DateTime: 2013-05-30T16:20:45+00:00 ((2456443j,58845s,0n),+0s,-Infj)>

ローカル時刻

 if Object.const_defined?(:TZInfo) # TZInfo gem がインストールされていること
   gdate = '2013-05-30T16:20:45'.when?(:tz=>'Asia/Tokyo')
   p gdate                                   #=> 2013-05-30T16:20:45+09:00
   p gdate.class                             #=> When::TM::DateAndTime
   p gdate.frame.iri                         #=> "http://hosi.org/When/CalendarTypes/Gregorian"
   p gtime.clock.tz_prop.timezone            #=> #<TZInfo::DataTimezone: Asia/Tokyo>
   sdate = gdate.to_datetime
   p sdate                                   #=> #<DateTime: 2013-05-30T16:20:45+09:00 ((2456443j,26445s,0n),+32400s,-Infj)>
 end
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