Class: Embulk::Filter::ExpandCsvArray

Inherits:
FilterPlugin
  • Object
show all
Defined in:
lib/embulk/filter/expand_csv_array.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.transaction(config, in_schema) {|task, out_columns| ... } ⇒ Object

Yields:

  • (task, out_columns) 


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# File 'lib/embulk/filter/expand_csv_array.rb', line 8

def self.transaction(config, in_schema, &control)
  # configuration code:
  task = {
    "csv_column_name" => config.param("csv_column_name", :string),
    "column_names" => config.param("column_names", :array, default: [])
  }

  task["target"] = in_schema.find {|c| c.name == task['csv_column_name']}
  task["columns"] = in_schema.select {|c| task["column_names"].include?(c.name) }

  out_columns = []
  task["column_names"].each_with_index do |name, idx|
    out_columns << Column.new(idx, name, :string)
  end

  yield(task, out_columns)
end

Instance Method Details

#add(page) ⇒ Object 



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# File 'lib/embulk/filter/expand_csv_array.rb', line 36

def add(page)
  # filtering code:
  page.each do |record|
    record[@target["index"]].to_s.parse_csv.to_a.each do |val|
      data = @columns.map do |f|
        if f["index"] == @target["index"]
          val
        else
          record[f["index"]]
        end
      end
      page_builder.add(data)
    end
  end
end

#close ⇒ Object 



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# File 'lib/embulk/filter/expand_csv_array.rb', line 33

def close
end

#finish ⇒ Object 



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# File 'lib/embulk/filter/expand_csv_array.rb', line 52

def finish
  page_builder.finish
end

#init ⇒ Object 



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# File 'lib/embulk/filter/expand_csv_array.rb', line 26

def init
  # initialization code:
  @csv_column_name = task["csv_column_name"]
  @columns = task["columns"]
  @target = task["target"]
end