Method: RubyXL::OOXMLObjectClassMethods#obtain_class_variable

Defined in:
lib/rubyXL/objects/ooxml_object.rb

#obtain_class_variable(var_name, default = nil) ⇒ Object

Get the value of a [sub]class variable if it exists, or create the respective variable with the passed-in default (or {}, if not specified)

Throughout this class, we are setting class variables through explicit method calls rather than by directly addressing the name of the variable because of context issues: addressing variable by name creates it in the context of defining class, while calling the setter/getter method addresses it in the context of descendant class, which is what we need.

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# File 'lib/rubyXL/objects/ooxml_object.rb', line 15

def obtain_class_variable(var_name, default = nil)
  self.class_variable_get(var_name)
rescue NameError
  self.class_variable_set(var_name, default || {})
end