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