- value =
- (params["#{componentname}::#{parametername}"] ||
- parameter[:value] ||
- (parameter[:output_of].nil? &&
- (params[parametername.to_s] ||
- parameter[:default])) ||
- nil)
- if value.nil? and
- ![false,'false',0,'0'].index parameter[:required]
- if parameter[:output_of]
- if not @components[parameter[:output_of].intern]
- errors << [componentname, parametername, "output_of refers to nonexistent component '#{parameter[:output_of]}'"]
- end
- next
+ if params.has_key?("#{componentname}::#{parametername}")
+ value = params["#{componentname}::#{parametername}"]
+ elsif parameter.has_key?(:value)
+ value = parameter[:value]
+ elsif parameter.has_key?(:output_of)
+ if !@components[parameter[:output_of].intern]
+ errors << [componentname, parametername, "output_of refers to nonexistent component '#{parameter[:output_of]}'"]
+ else
+ # value will be filled in later when the upstream
+ # component's output becomes known