Class: TZInfo::TransitionRule

Inherits:
Object
  • Object
show all
Defined in:
lib/tzinfo/transition_rule.rb

Overview

Base class for rules definining the transition between standard and daylight savings time.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(transition_at) ⇒ TransitionRule

Initializes a new TransitionRule.

Raises:

  • (ArgumentError) 


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# File 'lib/tzinfo/transition_rule.rb', line 14

def initialize(transition_at)
  raise ArgumentError, 'Invalid transition_at' unless transition_at.kind_of?(Integer)
  @transition_at = transition_at
end

Instance Attribute Details

#transition_at ⇒ Object (readonly)

Returns the number of seconds after midnight local time on the day identified by the rule at which the transition occurs. Can be negative to denote a time on the prior day. Can be greater than or equal to 86,400 to denote a time of the following day.



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# File 'lib/tzinfo/transition_rule.rb', line 11

def transition_at
  @transition_at
end

Instance Method Details

#==(r) ⇒ Object Also known as: eql?

Determines if this TransitionRule is equal to another instance.



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# File 'lib/tzinfo/transition_rule.rb', line 27

def ==(r)
  r.kind_of?(TransitionRule) && @transition_at == r.transition_at
end

#at(offset, year) ⇒ Object

Calculates the UTC time of the transition from a given offset on a given year.



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# File 'lib/tzinfo/transition_rule.rb', line 21

def at(offset, year)
  day = get_day(year)
  day.add_with_convert(@transition_at - offset.utc_total_offset)
end

#hash ⇒ Object

Returns a hash based on hash_args (defaulting to transition_at).



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# File 'lib/tzinfo/transition_rule.rb', line 33

def hash
  hash_args.hash
end