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module Morpher
class Evaluator
class Transformer
# Abstract namespace class for coercing transformers
class Coerce < self
include AbstractType, Nullary::Parameterized, Transitive
# Parse mixin for cases the parsing possibly results
# in Argument and Type errors.
module Parse
# Call evaluator
#
# @param [Object] input
#
# @return [Object]
#
# @api private
#
def call(input)
invoke(input)
rescue ArgumentError, TypeError
raise_transform_error(input)
end
# Return evaluation
#
# @param [Object] input
#
# @return [Evaluation]
#
# @api private
#
def evaluation(input)
evaluation_success(input, invoke(input))
rescue ArgumentError, TypeError
evaluation_error(input)
end
end # Parse
# Evaluator for parsing an integer
class ParseInt < self
include Parse
register :parse_int
# Return inverse evaluator
#
# @return [Evaluator]
#
# @api private
#
def inverse
IntToString.new(param)
end
private
# Invoke coercion
#
# @return [Integer]
#
# @raise [ArgumentError, TypeError]
# if coercion does not succeed
#
# @api private
#
def invoke(input)
Integer(input, param)
end
end # ParseInt
# Evaluator for dumping fixnums to strings
class IntToString < self
register :int_to_string
# Call evaluator
#
# @param [Object] input
#
# @return [Hash<Symbol, Object>]
#
# @api private
#
def call(input)
input.to_s(param)
end
# Return inverse evaluator
#
# @return [Evaluator]
#
# @api private
#
def inverse
ParseInt.new(param)
end
end # IntToString
# Evaluator for parsing an ISO8601 String into a DateTime
class ParseIso8601DateTime < self
include Parse
register :parse_iso8601_date_time
# Return inverse evaluator
#
# @return [Evaluator]
#
# @api private
#
def inverse
DateTimeToIso8601String.new(param)
end
private
# Invoke coercion
#
# @return [DateTime]
#
# @raise [ArgumentError, TypeError]
# if coercion does not succeed
#
# @api private
#
def invoke(input)
DateTime.iso8601(input)
end
end # ParseIso8601DateTime
# Evaluator for dumping a DateTime to an ISO8601 string
class DateTimeToIso8601String < self
register :date_time_to_iso8601_string
# Call evaluator
#
# @param [Object] input
#
# @return [Object]
#
# @api private
#
def call(input)
input.iso8601(param)
end
# Return inverse evaluator
#
# @return [Evaluator]
#
# @api private
#
def inverse
ParseIso8601DateTime.new(param)
end
end # DateTimeToIso8601String
end # Fixnum
end # Transformer
end # Evaluator
end # Morpher
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