module Sbuilder

  class ParamSetLoader

    attr_reader :factory                      # to create stuff
    attr_accessor :controller                 # get sets when load starts

    # ------------------------------------------------------------------
    # mixer
    PROGNAME = "ParamSetLoader"               # progname for logger
    include Sbuilder::Utils::MyLogger         # mix logger


    # ------------------------------------------------------------------
    # constructore
    
    def initialize( factory, options = {} )
      @logger = getLogger( PROGNAME, options )
      @logger.info( "#{__method__} initialized" )
      @factory = factory
    end

    # @param loaderDef [Hash] adding configuration for loader (override)
    def configure( loaderDef )
      doConfigure( loaderDef )
    end
    
    def doConfigure( loaderDef )
      msg = "Sub class should implement doConfigure -method"
      @logger.error( "#{__method__} #{msg}" )        
      raise NoMethodError.new( msg  )
    end
    
    # ------------------------------------------------------------------
    # load paramset from 'fileUri' 
    def load( controller, fileUri, cacheFile=nil )
      # controller which control loading
      @controller = controller
      
      begin
        loaded = doLoad( fileUri, cacheFile )
      rescue Exception => e
        msg = "Exception '#{e}' when loading fileUri '#{fileUri}'"
        @logger.error( "#{__method__} #{msg}" )
        puts msg
        raise e
      end

      # # iterate && report to controller
      # loaded.each do |paramSet|
      #   controller.interfaceEncountered( paramSet )
      # end
    end

    def createParamSet( type )
      factory.createParamSet( type )
    end

    def createParameter( type )
      factory.createParameter( type )
    end
    

    # ------------------------------------------------------------------
    # sub-class should implement the doload method
    def doLoad( fileUri, cacheFile=nil )
      msg = "Sub class should implement doLoad -method"
      @logger.error( "#{__method__} #{msg}" )        
      raise NoMethodError.new( msg  )
    end
    

  end # class ParamSetLoader


end # module