decoratorDemo.p

/*
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*/
/*------------------------------------------------------------------------
    File        : decoratorDemo.p
    Purpose     :

    Syntax      :

    Description :

    Author(s)   : Lutz Fechner
    Created     : Fri Sep 15 10:46:16 CEST 2023
    Notes       :
  ----------------------------------------------------------------------*/

/* ***************************  Definitions  ************************** */

BLOCK-LEVEL ON ERROR UNDO, THROW.

USING Consultingwerk.Demo.Decorator.* FROM PROPATH.

DEFINE VARIABLE oHouse          AS IHouse NO-UNDO.
DEFINE VARIABLE oSpecialHouse   AS IHouse NO-UNDO.
/* ***************************  Main Block  *************************** */

//CURRENT-WINDOW:WIDTH = 320.

//a basic house
oHouse = NEW BasicHouse().
DISPLAY "Basic House Energy Consumption is: " oHouse:GetEndEnergyConsumption() "kWh/year" SKIP WITH WIDTH 320.

//add insulation
oHouse = NEW InsulatedHouse(oHouse).
DISPLAY "Insulated House Energy Consumption is: " oHouse:GetEndEnergyConsumption() "kWh/year" SKIP WITH WIDTH 320.

//replace gas stove with heat pump
oHouse = NEW HeatPumpHouse(oHouse).
DISPLAY "Energy Consumption with Heat Pump and Insulation is: " oHouse:GetEndEnergyConsumption() "kWh/year" SKIP WITH WIDTH 320.

//install some solar panels
oHouse = NEW SolarPoweredHouse(oHouse).
DISPLAY "Energy Consumption after solar installation drops to: " oHouse:GetEndEnergyConsumption() "kWh/year" SKIP WITH WIDTH 320.

//this uses a derived class with overrides (the specialization is static).
oSpecialHouse = NEW HouseWithHeatPumpAndSolar().
DISPLAY "Energy Consumption of House with Heat Pump and Solar is: " oSpecialHouse:GetEndEnergyConsumption() "kWh/year" SKIP WITH WIDTH 320.

catch e as Progress.Lang.Error:
    message e:GetMessage(1).
end catch.