Class: Usine::Evaluator

Inherits:
Object
  • Object
show all
Defined in:
lib/usine/evaluator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(sequences = {}) ⇒ Evaluator

Returns a new instance of Evaluator.



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# File 'lib/usine/evaluator.rb', line 7

def initialize(sequences = {})
  @sequences = sequences
  @scoped_sequences = []
  @attributes = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_symbol, *args, &block) ⇒ Object 



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# File 'lib/usine/evaluator.rb', line 13

def method_missing(method_symbol, *args, &block)
  if block
    @attributes[method_symbol] = block.call
  else
    @attributes[method_symbol] = generate(method_symbol)
  end
end

Instance Attribute Details

#attributes ⇒ Object (readonly)

Returns the value of attribute attributes.



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# File 'lib/usine/evaluator.rb', line 3

def attributes
  @attributes
end

#scoped_sequences ⇒ Object (readonly)

Returns the value of attribute scoped_sequences.



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# File 'lib/usine/evaluator.rb', line 5

def scoped_sequences
  @scoped_sequences
end

#sequences ⇒ Object (readonly)

Returns the value of attribute sequences.



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# File 'lib/usine/evaluator.rb', line 4

def sequences
  @sequences
end

Instance Method Details

#generate(attribute) ⇒ Object 



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# File 'lib/usine/evaluator.rb', line 21

def generate(attribute)
  if sequence = scoped_sequences.detect { |x| x.attribute == attribute }
    sequence.next
  elsif sequence = sequences.detect { |x| x.attribute == attribute }
    sequence.next
  else
    raise(UsineError::SequenceNotFound, "Couldn’t find a sequence named : `#{attribute}`")
  end
end

#sequence(name, initial_value = 1, &block) ⇒ Object 



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# File 'lib/usine/evaluator.rb', line 31

def sequence(name, initial_value = 1, &block)
  @scoped_sequences << Sequence.new(name, initial_value, &block)
end