Class: Rgviz::ScalarFunctionColumn

Inherits:
Object
  • Object
show all
Defined in:
lib/rgviz/nodes.rb

Constant Summary collapse

Concat = 
Token::Concat
DateDiff = 
Token::DateDiff
Day = 
Token::Day
DayOfWeek = 
Token::DayOfWeek
Difference = 
Token::MINUS
Hour = 
Token::Hour
Lower = 
Token::Lower
Millisecond = 
Token::Millisecond
Minute = 
Token::Minute
Month = 
Token::Month
Now = 
Token::Now
Product = 
Token::STAR
Quarter = 
Token::Quarter
Quotient = 
Token::SLASH
Round = 
Token::Round
Floor = 
Token::Floor
Second = 
Token::Second
Sum = 
Token::PLUS
ToDate = 
Token::ToDate
Upper = 
Token::Upper
Year = 
Token::Year

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(function, *arguments) ⇒ ScalarFunctionColumn

Returns a new instance of ScalarFunctionColumn.



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# File 'lib/rgviz/nodes.rb', line 436

def initialize(function, *arguments)
  @function = function
  @arguments = arguments
end

Instance Attribute Details

#arguments ⇒ Object

Returns the value of attribute arguments.



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# File 'lib/rgviz/nodes.rb', line 434

def arguments
  @arguments
end

#function ⇒ Object

Returns the value of attribute function.



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# File 'lib/rgviz/nodes.rb', line 433

def function
  @function
end

Instance Method Details

#accept(visitor) ⇒ Object 



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# File 'lib/rgviz/nodes.rb', line 441

def accept(visitor)
  if visitor.visit_scalar_function_column(self)
    arguments.each{|x| x.accept visitor}
  end
  visitor.end_visit_scalar_function_column self
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


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# File 'lib/rgviz/nodes.rb', line 458

def eql?(other)
  other.class == ScalarFunctionColumn && other.function == @function && other.arguments == @arguments
end

#hash ⇒ Object 



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# File 'lib/rgviz/nodes.rb', line 448

def hash
  return @hash if @hash
  @hash = 1
  @hash = @hash * 31 + @function.hash
  @arguments.each do |arg|
    @hash = @hash * 31 + arg.hash
  end
  @hash
end

#to_s ⇒ Object 



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# File 'lib/rgviz/nodes.rb', line 464

def to_s
  case function
  when Sum, Difference, Product, Quotient
    "#{arguments[0].to_s} #{function} #{arguments[1].to_s}"
  else
    "#{function}(#{arguments.map(&:to_s).join(', ')})"
  end
end