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Contents
module Bmg
module Operator
#
# Rxmatch operator.
#
# Filters operand's tuples to those whose attributes match a
# given string or regular expression.
#
class Rxmatch
include Operator::Unary
DEFAULT_OPTIONS = {
case_sensitive: false
}
def initialize(type, operand, attrs, matcher, options)
@type = type
@operand = operand
@attrs = attrs
@matcher = matcher
@options = DEFAULT_OPTIONS.merge(options)
end
protected
attr_reader :attrs, :matcher, :options
def case_sensitive?
!!options[:case_sensitive]
end
public
def each
return to_enum unless block_given?
@operand.each do |tuple|
against = attrs.map{|a| tuple[a] }.join(" ")
matcher = self.matcher
unless case_sensitive?
against = against.downcase
matcher = matcher.downcase if matcher.is_a?(String)
end
yield(tuple) if against.match(matcher)
end
end
def to_ast
[ :rxmatch, operand.to_ast, attrs.dup, matcher, options.dup ]
end
protected
def _restrict(type, predicate)
@operand
.restrict(predicate)
.rxmatch(attrs, matcher, options)
end
protected ### inspect
def args
[ attrs, matcher, options ]
end
end # class Rxmatch
end # module Operator
end # module Bmg
Version data entries
31 entries across 31 versions & 1 rubygems