Class: ValueExpression

Inherits:
Arity1Operators show all
Defined in:
lib/lamep/Expressions/value_expression.rb

Constant Summary

Constants inherited from Arity1Operators

Arity1Operators::ARITY

Constants inherited from Operator

Operator::OPERATORS

Instance Attribute Summary

Attributes inherited from Arity1Operators

#operand

Instance Method Summary collapse

Methods inherited from Arity1Operators

#==

Methods inherited from Operator

exists?, factory!, operator, precedence!, register

Constructor Details

#initialize(operand) ⇒ ValueExpression

Returns a new instance of ValueExpression.



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# File 'lib/lamep/Expressions/value_expression.rb', line 3

def initialize(operand)
  @operand = operand
end

Instance Method Details

#evaluate(attributes = {}) ⇒ Object 



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# File 'lib/lamep/Expressions/value_expression.rb', line 11

def evaluate(attributes = {})
  if attributes.key? @operand
    attributes[@operand]
  else
    @operand
  end
end

#to_sql ⇒ Object 



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# File 'lib/lamep/Expressions/value_expression.rb', line 7

def to_sql
  operand
end