Class: Rules::Evaluators::Evaluator

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key) ⇒ Evaluator

Returns a new instance of Evaluator.



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# File 'lib/rules/evaluators/evaluator.rb', line 6

def initialize(key)
  @name = key.to_s
  @requires_rhs = true
end

Instance Attribute Details

#evaluation_method ⇒ Object

Returns the value of attribute evaluation_method.



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# File 'lib/rules/evaluators/evaluator.rb', line 4

def evaluation_method
  @evaluation_method
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/rules/evaluators/evaluator.rb', line 4

def name
  @name
end

#requires_rhs ⇒ Object

Returns the value of attribute requires_rhs.



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# File 'lib/rules/evaluators/evaluator.rb', line 4

def requires_rhs
  @requires_rhs
end

#type_for_rhs ⇒ Object

Returns the value of attribute type_for_rhs.



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# File 'lib/rules/evaluators/evaluator.rb', line 4

def type_for_rhs
  @type_for_rhs
end

Instance Method Details

#evaluate(lhs, rhs = nil) ⇒ Object 



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# File 'lib/rules/evaluators/evaluator.rb', line 11

def evaluate(lhs, rhs = nil)
  raise 'Unknown evaluation method' unless evaluation_method

  begin
    requires_rhs? ? evaluation_method.call(lhs, rhs) : evaluation_method.call(lhs)
  rescue StandardError => ex
    return false if Rules.config.errors_are_false?
    raise ex
  end
end

#requires_rhs? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rules/evaluators/evaluator.rb', line 22

def requires_rhs?
  @requires_rhs
end

#to_s ⇒ Object 



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# File 'lib/rules/evaluators/evaluator.rb', line 26

def to_s
  @name
end