c# barcode code 39 Remember that all classes involved in the prototype must add the Serializable( ) attribute. in Visual C#

Print Code 39 Full ASCII in Visual C# Remember that all classes involved in the prototype must add the Serializable( ) attribute.

Remember that all classes involved in the prototype must add the Serializable( ) attribute.
Code39 Printer In C#
Using Barcode maker for .NET Control to generate, create Code39 image in VS .NET applications.
www.OnBarcode.com
Code 3 Of 9 Recognizer In C#
Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Prototype Pattern |
Encode Barcode In C#
Using Barcode encoder for .NET framework Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
GS1 128 Creator In C#
Using Barcode generation for Visual Studio .NET Control to generate, create UCC - 12 image in Visual Studio .NET applications.
www.OnBarcode.com
Example: Photo Archive
ANSI/AIM Code 128 Encoder In Visual C#.NET
Using Barcode generation for .NET framework Control to generate, create USS Code 128 image in VS .NET applications.
www.OnBarcode.com
Create EAN / UCC - 13 In C#
Using Barcode creator for Visual Studio .NET Control to generate, create EAN / UCC - 13 image in VS .NET applications.
www.OnBarcode.com
As an example of the Prototype pattern, we ll extend the Photo Group application from 3 to include archiving using the following new commands:
Paint Code 39 In C#
Using Barcode creator for .NET Control to generate, create Code 39 image in .NET framework applications.
www.OnBarcode.com
Creating Leitcode In C#.NET
Using Barcode drawer for .NET framework Control to generate, create Leitcode image in .NET framework applications.
www.OnBarcode.com
Archive set Retrieve set Display Archive
Code 3/9 Scanner In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Code-39 Generator In Visual Studio .NET
Using Barcode maker for .NET framework Control to generate, create ANSI/AIM Code 39 image in .NET framework applications.
www.OnBarcode.com
The archive is an additional component at the same level as the album. The action associated with the two new commands is very simple:
Code-128 Generator In Java
Using Barcode generator for Eclipse BIRT Control to generate, create USS Code 128 image in BIRT reports applications.
www.OnBarcode.com
Code 128A Decoder In Visual Studio .NET
Using Barcode reader for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
case "Archive" : archive = point.Share(parameter,archive); break; case "Retrieve" : point = archive.Share(parameter,album); break;
Encode Code 128 In None
Using Barcode creator for Online Control to generate, create ANSI/AIM Code 128 image in Online applications.
www.OnBarcode.com
Paint UPC-A Supplement 5 In None
Using Barcode encoder for Microsoft Excel Control to generate, create UPC Symbol image in Microsoft Excel applications.
www.OnBarcode.com
and this is the Share method in the Composite class:
UPC Code Drawer In None
Using Barcode generation for Office Word Control to generate, create UPC-A image in Office Word applications.
www.OnBarcode.com
Draw UPC-A In VS .NET
Using Barcode generation for ASP.NET Control to generate, create UCC - 12 image in ASP.NET applications.
www.OnBarcode.com
public IComponent <T> Share (T set, IComponent <T> toHere) { IPrototype <IComponent <T>> prototype= this.Find (set) as IPrototype <IComponent <T>>; toHere.Add(copy); return toHere; }
Generate Barcode In Visual Basic .NET
Using Barcode generation for Visual Studio .NET Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
EAN / UCC - 14 Maker In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create EAN 128 image in ASP.NET applications.
www.OnBarcode.com
Of course, the Prototype Pattern is added as a used namespace as well. Given these changes to the program, the output can look like this (starting from the Display of the constructed composite):
EAN / UCC - 13 Generator In Java
Using Barcode printer for Java Control to generate, create UCC-128 image in Java applications.
www.OnBarcode.com
Barcode Printer In None
Using Barcode creation for Excel Control to generate, create Barcode image in Microsoft Excel applications.
www.OnBarcode.com
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Set Album length :2 --Set Home length :2 ----Dinner.jpg ----Set Pets length :2 ------Dog.jpg ------Cat.jpg --Set Garden length :4 ----Spring.jpg ----Summer.jpg ----Flowers.jpg ----Trees.jpg Find Pets Archive Pets Display Archive Set Archive length :1 --Set Pets length :2 ----Dog.jpg ----Cat.jpg Find Album Remove Home Find Album Remove Garden Display Set Album length :0
|
5: Creational Patterns: Prototype, Factory Method, and Singleton
28 29 30 31 32 33
Retrieve Pets Display Set Album length :1 --Set Pets length :2 ----Dog.jpg ----Cat.jpg
Lines 14 and 15 show that the Pets set is archived. In lines 21 24, we remove everything from the album; we then copy the contents back from the archive in lines 28 33. Because we used a deep copy, we could copy Pets repeatedly, or, as the name of the method suggests, aim to share it with other programs. The full listing of the Photo Archive program is in the Appendix.
Use
The Prototype pattern co-opts one instance of a class and uses it as a breeder for all future instances. Designs that make heavy use of the Composite and Decorator patterns often can benefit from the Prototype pattern as well. Prototypes are useful when object initialization is expensive and you anticipate few variations on the initialization parameters. In this context, the Prototype pattern can avoid expensive creation from scratch, supporting cheap cloning of a preinitialized prototype. However, cloning via serialization is not particularly cheap itself, so it is worth considering shallow cloning if you are absolutely sure you have a flat, single-level data structure. There are different situations where the Prototype pattern would be used: Say you have loaded a set of objects into memory and choose to copy by means of user input. When implementing user input, typically there are only a few choices of objects. These are known as the prototypes, and they are identified within the program by matching them up with the admissible input keys (such as strings, integers, or characters). The reason for using prototyping and not instantiation is to reduce the overhead when creating objects that have heavyweight constructors. There are composite structures in the program and parts of them need to be copied, perhaps for archiving. Which part to copy will normally be identified by user input. The parts will all be the same (or within the same hierarchy, as in the Composite pattern), and the copy will become the prototype, which should not be altered. An example of this scenario is the Photo Archive application.
Use the Prototype pattern when You want to: Hide concrete classes from the client. Add and remove new classes (via prototypes) at runtime. Keep the number of classes in the system to a minimum. Adapt to changing structures of data at runtime.
Prototype Pattern |
Use the Prototype pattern when Because: In C# 3.0, cloning by deep copying is absolutely straightforward. Consider using this pattern: With the Composite pattern, to provide archiving. Instead of the Factory Method pattern, when subclasses start proliferating.
Copyright © OnBarcode.com . All rights reserved.