Class: ApacheCrunch::TimeDerivationRule

Inherits:
DerivationRule show all
Defined in:
lib/derivation.rb

Overview

Derivation rule for elements derived from TimeToken

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TimeDerivationRule

Returns a new instance of TimeDerivationRule.



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# File 'lib/derivation.rb', line 26

def initialize
    @_derivation_regex = nil
    @_month_map = {"Jan" => 1, "Feb" => 2, "Mar" => 3, "Apr" => 4,
                   "May" => 5, "Jun" => 6, "Jul" => 7, "Aug" => 8,
                   "Sep" => 9, "Oct" => 10, "Nov" => 11, "Dec" => 12}
end

Instance Method Details

#derive(name, source_value) ⇒ Object 



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# File 'lib/derivation.rb', line 41

def derive(name, source_value)
    if @_derivation_regex.nil?
        @_derivation_regex = Regexp.compile(%q!^\[(\d\d)/([A-Za-z]{3})/(\d\d\d\d):(\d\d):(\d\d):(\d\d)!)
    end

    hsh = {}
    if source_value =~ @_derivation_regex
        hsh[:year] = $3.to_i
        hsh[:month] = @_month_map[$2]
        hsh[:day] = $1.to_i

        hsh[:hour] = $4.to_i
        hsh[:minute] = $5.to_i
        hsh[:second] = $6.to_i
    end

    hsh[name]
end

#source_name ⇒ Object 



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# File 'lib/derivation.rb', line 33

def source_name
    :time
end

#target_names ⇒ Object 



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# File 'lib/derivation.rb', line 37

def target_names
    [:year, :month, :day, :hour, :minute, :second]
end