4 attr_accessor :name, :result, :output_name, :action, :aggregate_format, :arguments
6 def initialize(output_name, arguments, aggregate_format, action)
7 @name = self.class.to_s
8 @output_name = output_name
10 # Any additional arguments passed in the ddl after the output field will
11 # be stored in the arguments array which can be used in the function
12 @arguments = arguments
13 @aggregate_format = aggregate_format
15 @result = {:value => nil, :type => nil, :output => output_name}
20 ['startup_hook', 'process_result'].each do |method|
21 define_method method do
22 raise RuntimeError, "'#{method}' method of function class #{@name} has not yet been implemented"
26 # Stops execution of the function and returns a specific ResultObject,
27 # aggregate functions will most likely override this but this is the simplest
28 # case so we might as well default to that
30 raise "Result type is not set while trying to summarize aggregate function results" unless @result[:type]
32 result_class(@result[:type]).new(@result, @aggregate_format, @action)
35 def result_class(type)
36 Result.const_get("#{type.to_s.capitalize}Result")