Template Method
The Template Method is know as a behavioral pattern which lets subclasses implement behaviour that can vary. In the example below we use the Template Method to allow sub classes to implement how a hot drink is made.
A VB example of the Temple Method Pattern
Public Class MyPage
Public Sub Page_Load()
Dim CupOfTea As HotDrink
CupOfTea = New Tea
Dim CupOfCoffee As HotDrink
CupOfCoffee = New Coffee
MakeDrink(CupOfTea)
Response.write(".........<br/>")
MakeDrink(CupOfCoffee)
End Sub ''' <summary>
''' Generic Method that will make the hot Drink
''' </summary>
Public Sub MakeDrink(ByVal HotDrink As HotDrink)
HotDrink.boilWater()
HotDrink.addIngredients()
HotDrink.addCondiments()
End Sub
End Class
''' <summary>
''' Abstract Class
''' </summary>
Public MustInherit Class HotDrink
Public Sub boilWater()
Response.write("Boiling Water...<br/>")
End Sub Public MustOverride Sub addIngredients()
Public MustOverride Sub addCondiments()
End Class''' <summary>
''' Tea Class that implements behaviour that can vary i.e.
''' the addIngredients & addCondiments methods
''' </summary>
Public Class Tea
Inherits HotDrink
Public Overrides Sub addCondiments()
Response.write("Add Milk ...<br/>")
End Sub Public Overrides Sub addIngredients()
Response.write("Add Tea Bags ...<br/>")
End Sub
End Class
''' <summary>
''' Coffee Class that implements behaviour that can vary i.e.
''' the addIngredients & addCondiments methods
''' </summary>
Public Class Coffee
Inherits HotDrink
Public Overrides Sub addCondiments()
Response.write("Add Milk ...<br/>")
End Sub Public Overrides Sub addIngredients()
Response.write("Add Coffee Granules ...<br/>")
End Sub
End Class
UML
Revision number 2, Tuesday, June 24, 2008 8:22:27 PM by scott@elbandit.co.uk
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Wed, Sep 10, 2008 2:28 AM
by gilfink
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Hi, Good example. You can read about the pattern in more details and get a C# example in the following post I wrote: http://blogs.microsoft.co.il/blogs/gilf/archive/2008/06/13/template-method-pattern.aspx
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Revision #35
Sat, Oct 25, 2008 11:22 AM
by
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Design Patterns
Design Patterns Design patterns are recognized solutions to common problems defined originally by the Gang of Four programmers. Design patterns are used throughout the ASP.NET Framework. The various patterns are commonly divided into several different groups
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