Class: Copper::Attribute

Inherits:
CopperNode
  • Object
show all
Defined in:
lib/copper/attribute.rb

Instance Method Summary collapse

Instance Method Details

#value(parent, vars = {}) ⇒ Object

attribute takes in a parent as it always depends on another node like “abc”.count here count is the attribute and string (abc) is the parent parent is a PORO



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# File 'lib/copper/attribute.rb', line 8

def value(parent, vars = {})
	raise "invalid use of attribute" if parent.nil? # this shouldn't happen as parser will not let .count to be called without a parent

	# 0 is the name of the attribute
	attribute = elements[0].value
	# 1 is the params and is optional
	params = elements[1].value(vars) unless elements[1].nil?

	# now we should call the func based on the name of the attribute with params on parent
	# here we first convert the PORO to a DataType to make the calls safe
	dt_obj = factory(parent)
	if dt_obj.respond_to?(attribute)
		if params.nil?
			return dt_obj.send(attribute)
		else
			return dt_obj.send(attribute, *params)
		end
	else
		raise ParseError, "#{attribute} is not a valid attribute for #{dt_obj.class.name}"
	end
end