class ApacheCrunch::DerivationRule
Abstract for classes that define how to obtain a given element from the value of another.
Public Instance Methods
derive(name, source_value)
click to toggle source
Derives the given derivable element from the given element value
# File lib/derivation.rb, line 10 def derive(name, source_value) raise NotImplementedError end
source_name()
click to toggle source
Returns the name of the element from which this rule derives values
# File lib/derivation.rb, line 5 def source_name raise NotImplementedError end