class Arel::Visitors::Visitor

Constants

DISPATCH

Public Instance Methods

accept(object) click to toggle source
# File lib/arel/visitors/visitor.rb, line 4
def accept object
  visit object
end

Private Instance Methods

dispatch() click to toggle source
# File lib/arel/visitors/visitor.rb, line 17
def dispatch
  DISPATCH[self.class]
end
visit(object, attribute = nil) click to toggle source
# File lib/arel/visitors/visitor.rb, line 21
def visit object, attribute = nil
  send dispatch[object.class], object, attribute
rescue NoMethodError => e
  raise e if respond_to?(dispatch[object.class], true)
  superklass = object.class.ancestors.find { |klass|
    respond_to?(dispatch[klass], true)
  }
  raise(TypeError, "Cannot visit #{object.class}") unless superklass
  dispatch[object.class] = dispatch[superklass]
  retry
end