class LANSA::XML::TransformerDelegator

# File xml/transformer.rb, line 560
def initialize delegate
  super
  @initial_delegate = delegate
  @current_delegate = nil
  @depth = -1
  @delegate_depth = nil
end

# File xml/transformer.rb, line 606
def delegator_intercept_end_element *args

  active_delegate = @current_delegate || @initial_delegate
  active_delegate.intercept_end_element *args

  # Set delegate back to initial when delegated depth is reached
  if @current_delegate and @delegate_depth == @depth

    @current_delegate.end
    @current_delegate = nil

    __setobj__(@initial_delegate)
    @delegate_depth = nil

  end

  @depth -= 1

end

# File xml/transformer.rb, line 568
def delegator_intercept_start_element *args

  # Increment 'depth' first
  @depth += 1

  active_delegate = @current_delegate || @initial_delegate

  if @current_delegate.nil?

    # Add 'depth' as new last parameter to 'find_delegate' and thus 'start?'!
    find_delegate_args = args.dup
    find_delegate_args << @depth

    # Find a 'matching' delegate.
    # Note that if none is found, we would call the 'intercept' methods
    # on the initial transformer anyway!
    delegate = active_delegate.find_delegate(*find_delegate_args)

    # If a delegate is found - and actually different from the active one
    # set it as the current delegate
    if not delegate.nil? and delegate != active_delegate

      @current_delegate = delegate
      @current_delegate.start
      __setobj__(@current_delegate)

      @delegate_depth = @depth
      active_delegate = @current_delegate

    end

  end

  active_delegate.intercept_start_element *args

end