Class: ActiveFacts::CQL::Compiler::Unit
- Inherits:
-
Definition
- Object
- Definition
- ActiveFacts::CQL::Compiler::Unit
- Defined in:
- lib/activefacts/cql/compiler/value_type.rb
Instance Attribute Summary
Attributes inherited from Definition
#constellation, #tree, #vocabulary
Instance Method Summary collapse
- #compile ⇒ Object
-
#initialize(singular, plural, numerator, denominator, offset, base_units, approximately, ephemera_url) ⇒ Unit
constructor
A new instance of Unit.
- #inspect ⇒ Object
- #to_s ⇒ Object
Methods inherited from Definition
#all_bindings_in_clauses, #assert_literal_value, #build_all_steps, #build_step, #build_variables, #source
Constructor Details
#initialize(singular, plural, numerator, denominator, offset, base_units, approximately, ephemera_url) ⇒ Unit
Returns a new instance of Unit.
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# File 'lib/activefacts/cql/compiler/value_type.rb', line 6 def initialize singular, plural, numerator, denominator, offset, base_units, approximately, ephemera_url @singular = singular @plural = plural @numerator, @denominator = numerator, denominator @offset = offset @base_units = base_units # An array of pairs, each [unit_name, power] @approximately = approximately @ephemera_url = ephemera_url end |
Instance Method Details
#compile ⇒ Object
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# File 'lib/activefacts/cql/compiler/value_type.rb', line 16 def compile if (@numerator.to_f / @denominator.to_i != 1.0) coefficient = @constellation.Coefficient( @numerator, @denominator.to_i, !@approximately # REVISIT: activefacts-api is complaining at present. The following is better and should work: # :numerator => @numerator, # :denominator => @denominator.to_i, # :is_precise => !@approximately ) else coefficient = nil end @offset = nil if @offset.to_f == 0 trace :units, "Defining new unit #{@singular}#{@plural ? "/"+@plural : ""}" do trace :units, "Coefficient is #{coefficient.numerator}#{coefficient.denominator != 1 ? "/#{coefficient.denominator}" : ""} #{coefficient.is_precise ? "exactly" : "approximately"}" if coefficient trace :units, "Offset is #{@offset}" if @offset raise "Redefinition of unit #{@singular}" if @constellation.Unit.values.detect{|u| u.name == @singular} raise "Redefinition of unit #{@plural}" if @constellation.Unit.values.detect{|u| u.name == @plural} unit = @constellation.Unit(:new, :name => @singular, :plural_name => @plural, :coefficient => coefficient, :offset => @offset, :is_fundamental => @base_units.empty?, :ephemera_url => @ephemera_url, :vocabulary => @vocabulary ) @base_units.each do |base_unit, exponent| base = @constellation.Unit.values.detect{|u| u.name == base_unit || u.plural_name == base_unit } trace :units, "Base unit #{base_unit}^#{exponent} #{base ? "" : "(implicitly fundamental)"}" base ||= @constellation.Unit(:new, :name => base_unit, :is_fundamental => true, :vocabulary => @vocabulary) @constellation.Derivation(:derived_unit => unit, :base_unit => base, :exponent => exponent) end =begin if @plural plural_unit = @constellation.Unit(:new, :name => @plural, :is_fundamental => false, :vocabulary => @vocabulary ) @constellation.Derivation(:derived_unit => plural_unit, :base_unit => unit, :exponent => 1) end =end unit end end |
#inspect ⇒ Object
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# File 'lib/activefacts/cql/compiler/value_type.rb', line 66 def inspect to_s end |
#to_s ⇒ Object
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# File 'lib/activefacts/cql/compiler/value_type.rb', line 70 def to_s super + "Unit(#{ @singular }#{ @plural ? '/'+@plural : '' }) is #{ @numerator }/#{ @denominator }+#{ @offset } #{ @base_units.map{|b,e| b+'^'+e.to_s }*'*' }" end |