Class: UserChoices::Conversion

Inherits:
Object
  • Object
show all
Defined in:
lib/user-choices/conversions.rb

Overview

:nodoc:

Constant Summary collapse

@@subclasses = 
[]

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(conversion_tag) ⇒ Conversion

Returns a new instance of Conversion.



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# File 'lib/user-choices/conversions.rb', line 28

def initialize(conversion_tag)
  @conversion_tag = conversion_tag
end

Class Method Details

.described_by?(conversion_tag) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/user-choices/conversions.rb', line 32

def self.described_by?(conversion_tag); subclass_responsibility; end

.for(conversion_tag) ⇒ Object 



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# File 'lib/user-choices/conversions.rb', line 22

def self.for(conversion_tag)
  subclass = @@subclasses.find { |sc| sc.described_by?(conversion_tag) }
  user_claims(subclass) { "#{conversion_tag} doesn't describe any Conversion object." }
  subclass.new(conversion_tag)
end

.inherited(subclass) ⇒ Object 



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# File 'lib/user-choices/conversions.rb', line 9

def self.inherited(subclass)
  @@subclasses << subclass
end

.is_abstract ⇒ Object 



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# File 'lib/user-choices/conversions.rb', line 13

def self.is_abstract
  @@subclasses.delete(self)
end

.record_for(conversion_tag, recorder) ⇒ Object 



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# File 'lib/user-choices/conversions.rb', line 17

def self.record_for(conversion_tag, recorder)
  return if conversion_tag.nil?   # This simplifies caller.
  recorder << self.for(conversion_tag)
end

Instance Method Details

#convert(value) ⇒ Object

Some conversions are just for error-checking



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# File 'lib/user-choices/conversions.rb', line 36

def convert(value); value; end

#description ⇒ Object 



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# File 'lib/user-choices/conversions.rb', line 34

def description; subclass_responsibility; end

#does_length_check? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/user-choices/conversions.rb', line 37

def does_length_check?; false; end

#suitable?(actual) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/user-choices/conversions.rb', line 33

def suitable?(actual); subclass_responsibility; end