Class: CronSpec::CronSpecificationFactory

Inherits:
Object
  • Object
show all
Defined in:
lib/cron-spec/cron_specification_factory.rb

Overview

Base class for the definition of CronSpecificationFactory classes.

Constant Summary collapse

WildcardPattern = 
/\A\*\z/
SingleValuePattern = 
/\A(\d+)\z/
RangePattern = 
/\A(\d+)-(\d+)\z/
StepPattern = 
/\A\*\/(\d+)\z/

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CronSpecificationFactory

Constructs a new CronSpecificationFactory



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# File 'lib/cron-spec/cron_specification_factory.rb', line 16

def initialize
  @single_value_pattern = SingleValuePattern
  @range_pattern = RangePattern
  @step_pattern = StepPattern
end

Instance Method Details

#parse(value_spec) ⇒ Object

Parses a unit of a cron specification. The supported patterns for parsing are one of:

  • Wildcard ‘*’

  • Single Scalar Value [0-9]+|(sun|mon|tue|wed|thu|fri|sat)|(jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec)

  • Range value (0-9, mon-fri, etc.)

  • Step value (*/[0-9]+)



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# File 'lib/cron-spec/cron_specification_factory.rb', line 31

def parse(value_spec)
  case value_spec
    when WildcardPattern
      WildcardCronValue.new(@lower_limit, @upper_limit)
    when @single_value_pattern
      SingleValueCronValue.new(@lower_limit, @upper_limit, convert_value($1))
    when @range_pattern
      RangeCronValue.new(@lower_limit, @upper_limit, convert_value($1), convert_value($2))
    when @step_pattern
      StepCronValue.new(@lower_limit, @upper_limit, $1.to_i)
    else
      raise "Unrecognized cron specification pattern."
  end
end