# File lib/sip/config.rb, line 20
    def self.load_file(location)
      Config.new YAML.load_file(location)
    end

# File lib/sip/config.rb, line 24
    def initialize(initial_values)
      # temp_keys are ones we'll delete before saving to a file
      @temp_keys = []
      merge! initial_values

      # initialize defaults, including setting dbname and tablename ease of use keys
      self['databases'].each { |dbname, dbconf|
        self['databases'][dbname] = DBCONF_DEFAULT.merge(dbconf)
        self['databases'][dbname]['dbname'] = dbname
        self['databases'][dbname]['tables'].each { |tablename, tableconf|
          tableconf = {'hive_table_name' => "#{dbname}_#{tablename}"}.merge(TABLECONF_DEFAULT).merge(tableconf)
          self['databases'][dbname]['tables'][tablename] = tableconf
          self['databases'][dbname]['tables'][tablename]['tablename'] = tablename
        }
      }
    end

# File lib/sip/config.rb, line 57
    def dbconf(dbname)
      self['databases'][dbname]
    end

# File lib/sip/config.rb, line 41
    def save_file(location)
      # remove unecessary dbname and tablename keys
      self['databases'].each { |dbname, dbconf|
        dbconf.delete 'dbname'
        dbconf['tables'].each { |tablename, tableconf|
          tableconf.delete 'tablename'
        }
      }

      File.open(location, 'w') { |f| 
        h = Hash.new.merge self
        @temp_keys.each { |k| h.delete k }
        YAML.dump(h, f) 
      }
    end

# File lib/sip/config.rb, line 73
    def set_temp(other, keys)
      keys.each { |k|
        @temp_keys << k
        self[k] = other[k]
      }
    end

# File lib/sip/config.rb, line 65
    def store_database(dbname, conf)
      self['databases'][dbname] = conf
    end

# File lib/sip/config.rb, line 69
    def store_table(dbname, tablename, conf)
      self['databases'][dbname]['tables'][tablename] = conf
    end

# File lib/sip/config.rb, line 61
    def tconf(dbname, tablename)
      dbconf(dbname)['tables'][tablename]
    end