Module: CLASP::Util::ValueParser::Internal_

Includes:
Exceptions
Defined in:
lib/clasp/util/value_parser.rb

Overview

:nodoc: all

Class Method Summary collapse

Class Method Details

.is_integer?(type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/clasp/util/value_parser.rb', line 63

def self.is_integer? type

	h	=	{}

	return true if Integer == type
	return true if :integer == type

	false
end

.obtain_integer(value, constraint, argument_spec) ⇒ Object 



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# File 'lib/clasp/util/value_parser.rb', line 73

def self.obtain_integer value, constraint, argument_spec

	# If no value is given, then use the default (and don't do any
	# range testing)

	if (value || '').empty?

		def_value = argument_spec.default_value

		if (def_value || '').to_s.empty?

			msg = "no value specified for the option '#{argument_spec.name}', which has no default value either"

			warn msg if $DEBUG

			raise MissingValueException, msg
		end

		begin

			return Integer(def_value)
		rescue ArgumentError => x

			msg = "default value '#{def_value}' specified for option '#{argument_spec.name}' that requires the value to be an integer"

			warn msg if $DEBUG

			raise InvalidIntegerException, msg
		end
	end

	# obtain the integer from the value

	v = nil

	begin

		v = Integer(value)
	rescue ArgumentError => x

		msg = "value '#{value}' specified for option '#{argument_spec.name}' that requires the value to be an integer"

		warn msg if $DEBUG

		raise InvalidIntegerException, msg
	end

	# Is there a value constraint?:
	#
	# - values (obtained from argument_spec#values)
	# - range
	# - minimum & maximum

	values_range	=	argument_spec.values_range

	unless values_range.empty?

		v_s		=	v.to_s

		v_s		=	'+' + v_s unless '-' == v_s[0]

		vr_s	=	values_range.map { |x| x.to_s }.map { |x| '-' == x[0] ? x : '+' + x }

		unless vr_s.include? v_s

			msg = "given value '#{value}' specified for option '#{argument_spec.name}' does not fall within the required range"

			raise IntegerOutOfRangeException, msg
		end
	else

		case range = constraint[:range]
		when :negative

			if v >= 0

				msg	=	"given value '#{value}' specified for option '#{argument_spec.name}' must be a negative integer"

				raise IntegerOutOfRangeException, msg
			end
		when :positive

			if v < 1

				msg	=	"given value '#{value}' specified for option '#{argument_spec.name}' must be a positive integer"

				raise IntegerOutOfRangeException, msg
			end
		when :non_positive

			if v > 0

				msg	=	"given value '#{value}' specified for option '#{argument_spec.name}' must be a non-positive integer"

				raise IntegerOutOfRangeException, msg
			end
		when :non_negative

			if v < 0

				msg	=	"given value '#{value}' specified for option '#{argument_spec.name}' must be a non-negative integer"

				raise IntegerOutOfRangeException, msg
			end
		when Range

			unless range.include?

				msg = "given value '#{value}' specified for option '#{argument_spec.name}' does not fall within the required range"

				raise IntegerOutOfRangeException, msg
			end
		else

			;
		end
	end

	v
end