Module: Abtab

Defined in:
lib/abtab.rb,
lib/abtab/driver.rb,
lib/abtab/filter.rb,
lib/abtab/filter/grep.rb

Defined Under Namespace

Classes: Driver, Filter

Constant Summary collapse

REGISTERED_DRIVERS = 
{}

Class Method Summary collapse

Class Method Details

.open(thing) ⇒ Object 



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# File 'lib/abtab.rb', line 10

def self.open thing
  if thing !~ /^.+?:\/\//
    return self.open_file thing
  end

  viable_drivers = REGISTERED_DRIVERS.keys.select do |schema|
    thing.start_with? schema
  end

  if 0 == viable_drivers.size
    raise "Error: there is no registered driver for url: #{thing}"
  end

  if 1 == viable_drivers.size
    REGISTERED_DRIVERS[viable_drivers.first].new thing
  end
end

.open_file(thing) ⇒ Object 



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# File 'lib/abtab.rb', line 40

def self.open_file thing
  # TODO: put in some more 'magick' -- use some hueristics to figure out the likely format by looking at the first few lines...
  if thing =~ /.tab$/
    return self.open "tab://#{thing}"
  end

  if thing =~ /.csv$/
    return self.open "csv://#{thing}"
  end

  if thing =~ /.xls$/
    return self.open "xls://#{thing}"
  end

  # tab delimited is the default
  return self.open "tab://#{thing}"
end

.read_handle(uri) ⇒ Object 



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# File 'lib/abtab.rb', line 28

def self.read_handle uri
  driver = self.open uri
  driver.open_for_reading
  driver
end

.register(schema, driver) ⇒ Object 



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# File 'lib/abtab.rb', line 6

def self.register schema, driver
  REGISTERED_DRIVERS[schema] = driver
end

.write_handle(uri) ⇒ Object 



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# File 'lib/abtab.rb', line 34

def self.write_handle uri
  driver = self.open uri
  driver.open_for_writing
  driver
end