Class: Ferret::Alias_Generator

Inherits:
Object
  • Object
show all
Defined in:
lib/sql-ferret.rb

Instance Method Summary collapse

Constructor Details

#initialize(used_ids) ⇒ Alias_Generator

Returns a new instance of Alias_Generator.



445
446
447
448
449
450
 
# File 'lib/sql-ferret.rb', line 445

def initialize used_ids
  super()
  @used_ids = Set.new used_ids
  @counter = 0
  return
end

Instance Method Details

#available?(id) ⇒ Boolean

Returns:

  • (Boolean) 


461
462
463
 
# File 'lib/sql-ferret.rb', line 461

def available? id
  return !@used_ids.include?(id)
end

#create(prefix) ⇒ Object 



452
453
454
455
456
457
458
459
 
# File 'lib/sql-ferret.rb', line 452

def create prefix
  begin
    @counter += 1
    candidate = prefix + @counter.to_s
  end while @used_ids.include? candidate
  @used_ids.add candidate
  return candidate
end

#reserve(id) ⇒ Object 



465
466
467
468
469
470
471
 
# File 'lib/sql-ferret.rb', line 465

def reserve id
  if @used_ids.include? id then
    ugh 'already-reserved', identifier: id
  end
  @used_ids.add id
  return id
end