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Contents
# encoding: UTF-8
# Copyright 2012 Twitter, Inc
# http://www.apache.org/licenses/LICENSE-2.0
# http://unicode.org/reports/tr35/tr35-general.html#Transforms
# http://unicode.org/cldr/utility/transform.jsp
module TwitterCldr
module Transforms
class FilteredRuleSet
attr_reader :filter_rule, :transform_id
def initialize(filter_rule, transform_id)
@filter_rule = filter_rule
@transform_id = transform_id
end
def foward?
true
end
def backward?
false
end
def is_filter_rule?
false
end
def is_transform_rule?
false
end
def is_conversion_rule?
false
end
def invert
raise NotInvertibleError,
"cannot invert this #{self.class.name}"
end
def transform(text)
rule_set.transform(text)
end
def rule_set
@rule_set ||= begin
rs = Transformer.get(transform_id)
# replace any existing filters in all conversion rules and build
# a new rule set
new_rules = rs.rules.map do |rule|
next rule unless rule.is_conversion_rule_set?
ConversionRuleSet.new(filter_rule, nil, rule.rules)
end
RuleSet.new(new_rules, transform_id)
end
end
end
end
end
Version data entries
29 entries across 29 versions & 1 rubygems