Class: CTioga2::Data::Backends::TextBackend

Inherits:
Backend
  • Object
show all
Includes:
Dobjects
Defined in:
lib/ctioga2/data/backends/backends/text.rb

Constant Summary collapse

UNCOMPRESSORS =

A constant holding a relation extension -> command to decompress (to be fed to sprintf with the filename as argument)

{
  ".gz" => "gunzip -c %s",
  ".bz2" => "bunzip2 -c %s",
  ".lzma" => "unlzma -c %s",
  ".lz" => "unlzma -c %s",
}

Instance Method Summary collapse

Methods inherited from Backend

#dataset, describe, #description, #has_set?, list_backends, #set_param_from_string, #sets_available

Methods included from BackendDescriptionExtend

#base_description, #create_factory, #describe, #description, #factory_class, #factory_description, #factory_description_hash, #factory_description_list, #has_factory?, #inherit_parameters, #param, #param_accessor, #param_reader, #param_writer, #register_class, #set_description

Methods included from Log

debug, error, fatal, #format_exception, #identify, info, init_logger, logger, set_level, #spawn, warn

Constructor Details

#initialize ⇒ TextBackend

param_accessor :select, ‘select’, “Select lines”, => :string,

"Skips line where the code returns false"



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# File 'lib/ctioga2/data/backends/backends/text.rb', line 83

def initialize
  @dummy = nil
  @current = nil   
  # Current is the name of the last file used. Necessary for '' specs.
  @current_data = nil       # The data of the last file used.
  @skip = 0
  @included_modules = [NaN]    # to make sure we give them to
  # Dvector.compute_formula
  @default_column_spec = "1:2"

  @separator = /\s+/

  # We don't split data by default.
  @split = false

  super()

  # Override Backend's cache - for now.
  @cache = {}               # A cache file_name -> data

end

Instance Method Details

#expand_sets(spec) ⇒ Object

Expands specifications into few sets. This function will separate the set into a file spec and a col spec. Within the col spec, the 2##6 keyword is used to expand to 2,3,4,5,6. 2## followed by a non-digit expands to 2,…,last column in the file. For now, the expansions stops on the first occurence found, and the second form doesn’t work yet. But soon…



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# File 'lib/ctioga2/data/backends/backends/text.rb', line 116

def expand_sets(spec)
  if m = /(\d+)##(\D|$)/.match(spec)
    a = m[1].to_i 
    trail = m[2]
    b = read_file(spec)
    b = (b.length - 1) 
    ret = []
    a.upto(b) do |i|
      ret << m.pre_match + i.to_s + trail + m.post_match
    end
    return ret
  else
    return super
  end
end

#extend(mod) ⇒ Object 



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# File 'lib/ctioga2/data/backends/backends/text.rb', line 105

def extend(mod)
  super
  @included_modules << mod
end