Class: AppKernel::FunctionApplication::Arguments

Inherits:
Object
  • Object
show all
Defined in:
lib/appkernel/function.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, *args) ⇒ Arguments

Returns a new instance of Arguments.



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# File 'lib/appkernel/function.rb', line 57

def initialize(app, *args)
  fun = app.function
  @app = app
  @canonical = {}
  @required = Set.new(fun.options.values.select {|o| o.required?})      
  @optorder = fun.indexed_options  

  for arg in args
    if (arg.is_a?(Hash))
      arg.each do |k,v|
        if opt = fun.options[k.to_sym]
          set opt, v
        else
          raise FunctionCallError, "#{fun.name}: unknown option :#{k}"
        end 
      end
    elsif opt = @optorder.shift
      set opt, arg
    end
  end
  for opt in fun.options.values
    if @canonical[opt.name].nil? && !opt.default.nil?
      @canonical[opt.name] = opt.default
      @required.delete opt
    end
  end
  for opt in @required
    app.errors[opt.name] = "missing required option '#{opt.name}'"
  end
  for name in fun.options.keys
    @canonical[name] = nil if @canonical[name].nil?
  end        
end

Instance Attribute Details

#canonical ⇒ Object (readonly)

Returns the value of attribute canonical.



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# File 'lib/appkernel/function.rb', line 55

def canonical
  @canonical
end

Instance Method Details

#set(opt, value) ⇒ Object 



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# File 'lib/appkernel/function.rb', line 91

def set(opt, value)
  resolved = opt.resolve(@app, value)      
  if !resolved.nil?
    @canonical[opt.name] = resolved
    @required.delete opt
  elsif !value.nil? && opt.required? 
    @required.delete opt
    @required.delete opt
    @app.errors[opt.name] = "no such value '#{value}' for required option '#{opt.name}'"          
  end
end