Class: ActiveFacts::Metamodel::Unit

Inherits:

Object

• Object
• ActiveFacts::Metamodel::Unit

Defined in:

lib/activefacts/generators/cql.rb

Instance Method Summary

• #as_cql ⇒ Object

Instance Method Details

#as_cql ⇒ Object

# File 'lib/activefacts/generators/cql.rb', line 668

def as_cql
  if !ephemera_url
    if coefficient
      # REVISIT: Use a smarter algorithm to switch to exponential form when there'd be lots of zeroes.
      coefficient.numerator.to_s('F') +

      if d = coefficient.denominator and d != 1
        "/#{d}"
	    else
 ''
      end +

      ' '
    else
      '1 '
    end
	else
	  ''
  end +

	all_derivation_as_derived_unit.
	  sort_by{|d| d.base_unit.name}.
    # REVISIT: Sort base units
    # REVISIT: convert negative powers to division?
    map do |der|
      base = der.base_unit
      "#{base.name}#{der.exponent and der.exponent != 1 ? "^#{der.exponent}" : ''} "
    end*'' +

  if o = offset and o != 0
    "+ #{o.to_s('F')} "
	else
	  ''
  end +

  "converts to #{name}#{plural_name ? '/'+plural_name : ''}" +

	(coefficient && !coefficient.is_precise ?  ' approximately' : '') +

	(ephemera_url ? " ephemera #{ephemera_url}" : '') +

  ';'
end