Class: CsvBuilder::Streamer

Inherits:
Object
  • Object
show all
Defined in:
lib/csv_builder/template_handler.rb

Overview

Streamer implements an each method to facilitate streaming back through the Rails stack. It requires the template to be passed to it as a proc. An instance of this class is returned from the template handler’s compile method, and will receive calls to each. Data is streamed by yielding back to the containing block.

Instance Method Summary collapse

Constructor Details

#initialize(template_proc) ⇒ Streamer

Returns a new instance of Streamer.



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# File 'lib/csv_builder/template_handler.rb', line 78

def initialize(template_proc)
  @template_proc = template_proc
end

Instance Method Details

#each ⇒ Object 



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# File 'lib/csv_builder/template_handler.rb', line 82

def each
  yielder = CsvBuilder::Yielder.new(Proc.new{|data| yield data})
  csv_stream = CsvBuilder::CSV_LIB.new(yielder, @csv_options || {})
  csv = CsvBuilder::TransliteratingFilter.new(csv_stream, @input_encoding || 'UTF-8', @output_encoding || 'ISO-8859-1')
  @template_proc.call(csv)
end