Class: Optimus::Reader::TabfileParser

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

Overview

This class is for reading tab-delimited Optimus files. (Or, really, any tab-delimited file). The main option of interest is the :skip_lines option, which specifies how many lines to skip before finding column names. For example:

TabfileParser.new(stream, :skip_lines => 1)

is what you’d use for skipping the filename line in a standard optimus Excel file.

Note: you’ll generally be using subclasses of this, and not manually specifying skip_lines.

Direct Known Subclasses

ExcelParser, OptimustabParser, RawTabParser

Instance Method Summary collapse

Constructor Details

#initialize(file, options = {}) ⇒ TabfileParser

Returns a new instance of TabfileParser.



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# File 'lib/tabfile_parser.rb', line 23

def initialize(file, options = {})
  @file = file
  @skip_lines = options[:skip_lines] || 0
  @columns = options[:columns]
end

Instance Method Details

#to_optimus ⇒ Object 



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# File 'lib/tabfile_parser.rb', line 29

def to_optimus
  lines = @file.readlines
  @skip_lines.times do
    lines.shift
  end
  
  file_columns = lines.shift.split("\t").map {|elt| elt.strip }
  expected_size = file_columns.size
  columns = file_columns
  data = Optimus::Data.new(columns)
  current_line = @skip_lines+1
  lines.each do |line|
    current_line += 1
    row = data.add_row
    col_data = line.split("\t").map {|e| e.strip }
    if col_data.size != expected_size
      raise DamagedFileError.new("In #{@file.path}, line #{current_line} should have #{expected_size} columns but had #{col_data.size}.")
    end
    row.values = col_data
  end
  return data
end