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Contents
module Locomotive::Steam
module Adapters
module Memory
class Order
attr_reader :list
def initialize(*spec)
@list = []
spec.compact.each do |criterion|
@list += (case criterion
when Array then criterion
when Hash then criterion.to_a
when String then criterion.split(',').collect { |s| build(s.strip) }
else []
end)
end
end
def empty?
@list.empty?
end
def apply_to(entry, locale)
@list.collect do |(name, direction)|
value = entry.send(name)
asc?(direction) ? Asc.new(value) : Desc.new(value)
end
end
def asc?(direction)
direction.nil? || direction.to_sym == :asc
end
private
def build(string)
pattern = string.include?('.') ? '.' : ' '
string.downcase.split(pattern).map(&:to_sym)
end
class Direction
attr_reader :obj
def initialize(obj); @obj = obj; end
end
class Asc < Direction
def <=>(other); @obj <=> other.obj; end
end
class Desc < Direction
def <=>(other); other.obj <=> @obj; end
end
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems