# File lib/rbatis.rb, line 131
    def initialize(factory, fields)
      @factory = factory
      @fields = {}
      fields.each do |name, field_spec|
        if field_spec.is_a?(Array)
          @fields[name] = Column.new(*field_spec)
        else
          @fields[name] = field_spec
        end
        @fields[name].name = name
      end
    end