Powershell Design Patterns Prototype

class Person {

[int] $Age

[DateTime] $BirthDate

[string] $Name

[IdInfo] $IdInfo

[Person] ShallowCopy() {

return [Person] $this.MemberwiseClone()

}

[Person] DeepCopy() {

[Person] $clone = [Person] $this.MemberwiseClone()

$clone.IdInfo = [IdInfo]::new($this.IdInfo.IdNumber)

$clone.Name = $($this.Name).ToString()

return $clone

}

}

class IdInfo {

[int] $IdNumber

IdInfo([int] $idNumber) {

$this.IdNumber = $idNumber

}

}

class Program {

Main() {

[Person] $p1 = [Person]::new()

$p1.Age = 42

$p1.BirthDate = "1977-01-01"

$p1.Name = "Jack Daniels"

$p1.IdInfo = [IdInfo]::new(777)

[Person] $p2 = $p1.ShallowCopy()

[Person] $p3 = $p1.DeepCopy()

Write-Host "Original values of p1, p2, p3:"

Write-Host " p1 instance values: "

$this.DisplayValues($p1)

Write-Host " p2 instance values:"

$this.DisplayValues($p2)

Write-Host " p3 instance values:"

$this.DisplayValues($p3)

$p1.Age = 32

$p1.BirthDate = "1983-01-01"

$p1.Name = "Frank"

$p1.IdInfo.IdNumber = 7878

Write-Host "\nValues of p1, p2 and p3 after changes to p1:"

Write-Host " p1 instance values: "

$this.DisplayValues($p1)

Write-Host " p2 instance values (reference values have changed):"

$this.DisplayValues($p2)

Write-Host " p3 instance values (everything was kept the same):"

$this.DisplayValues($p3)

}

[void] DisplayValues([Person] $p) {

Write-Host ("Name: {0:s}, Age: {1:d}, BirthDate: {2:dd/MM/yyyy}" -f $p.Name, $p.Age, $p.BirthDate)

Write-Host " ID"

}

}

[Program]::new().Main()