Class: ActiveFacts::CQL::Compiler::ValueType

Inherits:
ObjectType show all
Defined in:
lib/activefacts/cql/compiler/value_type.rb

Instance Attribute Summary

Attributes inherited from ObjectType

#name

Attributes inherited from Definition

#constellation, #tree, #vocabulary

Instance Method Summary collapse

Methods inherited from Definition

#all_bindings_in_clauses, #build_all_steps, #build_steps, #build_variables, #source

Constructor Details

#initialize(name, base, parameters, unit, value_constraint, pragmas, context_note) ⇒ ValueType

Returns a new instance of ValueType.



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# File 'lib/activefacts/cql/compiler/value_type.rb', line 90

def initialize name, base, parameters, unit, value_constraint, pragmas, context_note
  super name
  @base_type_name = base
  @parameters = parameters
  @unit = unit
  @value_constraint = value_constraint
  @pragmas = pragmas
	  @context_note = context_note
end

Instance Method Details

#compile ⇒ Object 



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# File 'lib/activefacts/cql/compiler/value_type.rb', line 100

def compile
  length, scale = *@parameters

  # Create the base type unless it already exists:
  base_type = nil
  if (@base_type_name != @name)
	    unless base_type = @vocabulary.valid_value_type_name(@base_type_name)
      base_type = @constellation.ValueType(@vocabulary, @base_type_name, :concept => :new)
      return base_type if @base_type_name == @name
    end
  end

  # Create and initialise the ValueType:
	  vt = @vocabulary.valid_value_type_name(@name) ||
	    @constellation.ValueType(@vocabulary, @name, :concept => :new)
  vt.is_independent = true if (@pragmas.include? 'independent')
  vt.supertype = base_type if base_type
  vt.length = length if length
  vt.scale = scale if scale

  unless @unit.empty?
    unit_name, exponent = *@unit[0]
    unit = @constellation.Name[unit_name].unit ||
      @constellation.Name[unit_name].unit_as_plural_name
    raise "Unit #{unit_name} for value type #{@name} is not defined" unless unit
    if exponent != 1
      base_unit = unit
      unit_name = base_unit.name+"^#{exponent}"
      unless unit = @constellation.Unit.detect{|k,v| v.name == unit_name } 
        # Define a derived unit (these are skipped on output)
        unit = @constellation.Unit(:new,
              :vocabulary => @vocabulary,
              :name => unit_name,
              :is_fundamental => false
            )
        @constellation.Derivation(unit, base_unit).exponent = exponent
      end
    end
    vt.unit = unit
  end

  if @value_constraint
    @value_constraint.constellation = @constellation
    vt.value_constraint = @value_constraint.compile
  end

	  if @context_note
	    @context_note.compile(@constellation, vt)
	  end

  vt
end

#to_s ⇒ Object 



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# File 'lib/activefacts/cql/compiler/value_type.rb', line 153

def to_s
  "ValueType: #{super} is written as #{
      @base_type_name
    }#{
      @parameters.size > 0 ? "(#{ @parameters.map{|p|p.to_s}*', ' })" : ''
    }#{
      @unit && @unit.length > 0 ? " in #{@unit.inspect}" : ''
    }#{
      @value_constraint ? " "+@value_constraint.to_s : ''
    }#{
      @pragmas.size > 0 ? ", pragmas [#{@pragmas*','}]" : ''
    };"
end