PowerShell example demonstrating the Facade Design Pattern implementation

StartComputer.ps1

class CPU {

    freeze() { "$this freezing" | Out-Host }
    jump($position) { "$this jump to $position" | Out-Host }
    execute() { "$this execute" | Out-Host }
}

class Memory {
    load($position, $data) { 
        "$this load $position $data" | Out-Host 
    }
}

class HardDrive {
    [object] read($lba, $size) {
        "$this read $lba $size" | Out-Host
        return "(some data)"
    }
}

# Façade
class Computer {
    hidden [CPU]$cpu
    hidden [Memory]$memory
    hidden [HardDrive]$hardDrive

    Computer() {
        $this.cpu = New-Object CPU
        $this.memory = New-Object Memory
        $this.hardDrive = New-Object HardDrive
    }

    StartComputer() {
        $this.cpu.freeze()
        $this.memory.load(0, $this.hardDrive.read(0, 1024))
        $this.cpu.jump(10)
        $this.cpu.execute()
    }
}

$façade = [Computer]::new()
$façade.StartComputer()