Abstract Factory Pattern

•

0 gefällt mir•363 views

Presentation given at Melbourne Patterns Group (Sept 2005) http://htxt.it/ovLs

Abstract Factory Pattern Provide an interface for creating families of related or dependent objects without specifying their concrete classes

Design Strategies recommended by GoF ,[object Object],[object Object],[object Object]

Themes of Creational Patterns ,[object Object],[object Object]

Applicability ,[object Object],[object Object],[object Object],[object Object]

Implementation ,[object Object],[object Object],[object Object]

Abstract Factory using Factory Method

Consequences of Classic Abstract Factory ,[object Object],[object Object],[object Object],[object Object]

Pluggable Factory John Vlissides C++ Report, February 1999

Consequences of Pluggable Factory ,[object Object],[object Object],[object Object],[object Object],[object Object]

Implementation - 2 nd Dimension ,[object Object],[object Object]

Extensible Factories Timothy R. Culp C++ Report, October 1999

Consequences of Extensible Factories ,[object Object],[object Object],[object Object],[object Object],[object Object]

Weitere ähnliche Inhalte

Ähnlich wie Abstract Factory Pattern

Software Patterns

Software Patterns

Software Patterns

Factory Method Pattern

Factory Method Pattern

Factory Method Pattern

Factory Method Pattern

Factory Method Pattern

Factory Method Pattern

Unit 2-Design Patterns.ppt

Unit 2-Design Patterns.ppt

Unit 2-Design Patterns.ppt

Sda 8

Gof design patterns

Gof design patterns

Gof design patterns

Srikanth R Vaka

Code Like a Ninja Session 7 - Creational Design Patterns

Code Like a Ninja Session 7 - Creational Design Patterns

Code Like a Ninja Session 7 - Creational Design Patterns

Design pattern

Layers of Smalltalk Application

Layers of Smalltalk Application

Layers of Smalltalk Application

Facade pattern presentation(.pptx)

Facade pattern presentation(.pptx)

Facade pattern presentation(.pptx)

Typescript design patterns applied to sharepoint framework - Sharepoint Satur...

Typescript design patterns applied to sharepoint framework - Sharepoint Satur...

Typescript design patterns applied to sharepoint framework - Sharepoint Satur...

Testing the untestable

Testing the untestable

Testing the untestable

How effective is modularization

How effective is modularization

How effective is modularization

Patterns (contd) Software Development Process Design patterns used to handle change More time extending and changing code than developing it. The Strategy design pattern handle change by selecting from a family of external algorithms rather than rewrite. Design point: Make code closed for modification of code, but open for extension Problem Computer object created Description Method returns Getting a Computer Problem Program has to change every time Customer changes options Decorator Pattern Wrapper code used to extend your core code Extend a class dynamically at runtime Decorator uses wrapper code to extend core functionality - decorating the code Decorator Pattern description() returns “You are getting a computer” Wrapper description() returns “You are getting a computer and a disk” Wrapper description() returns “You are getting a computer and a disk and a monitor” Decorator Pattern Core component: Computer Variables holding computer objects should also be able to hold objects that wrap computer objects. Extend the wrapper classes from the Computer class. Abstract class cannot be instantiated Ensures all wrappers are consistent Developers have to provide their own description Decorator Pattern Method calls the core computer object’s description method and adds “and a disk” Decorator Pattern Method calls the core computer object’s description method and adds “and a disk” Extend the core object by wrapping it in decorator wrappers. Avoids modification of the core code. Each successive wrapper called the description method of the object it wrapped and added something to it. Factory Pattern Based on type, call the Connection method Factory Pattern Create a method that returns the correct connection type Factory Pattern New operator used to create OracleConnection objects. New operator used to create SqlServerConnection objects, and MySqlConnection objects. New operator to instantiate many different concrete classes Code becomes larger and needs to be replicated in many places Factor that code out into a method. Code keeps changing Encapsulate code into a factory object Goal: Separate out the changeable code and leave the core code closed for modification Building the Factory Creating the Factory FirstFactory class encapsulates the connection object creation Pass to it the type of connection (“Oracle”, “SQL Server”,) Use the factory object to create connection objects with a factory method named createConnection Building the Factory Create the FirstFactory class. Save the type of the database, passed to the FirstFactory class’s constructor. Object-creation code changes Check which type of object to be created (OracleConnection, SqlServerConnection, and then create it. Factory Class Create the Abstract Connection Class Core code should not be modified or has to be modified as little as possible. Using the connection object returned by the new factory object Use t.

Patterns (contd)Software Development ProcessDesign patte.docx

Patterns (contd)Software Development ProcessDesign patte.docx

Patterns (contd)Software Development ProcessDesign patte.docx

Let us understand design pattern

Let us understand design pattern

Let us understand design pattern

Mindfire Solutions

Bartlesville Dot Net User Group Design Patterns

Bartlesville Dot Net User Group Design Patterns

Bartlesville Dot Net User Group Design Patterns

Jason Townsend, MBA

Comfortable code

Comfortable code

Comfortable code

Design Patterns

Design Patterns

Design Patterns

Rafael Coutinho

Most Useful Design Patterns

Most Useful Design Patterns

Most Useful Design Patterns

Common ASP.NET Design Patterns - Telerik India DevCon 2013

Common ASP.NET Design Patterns - Telerik India DevCon 2013

Common ASP.NET Design Patterns - Telerik India DevCon 2013

Ähnlich wie Abstract Factory Pattern (20)

Software Patterns

Software Patterns

Software Patterns

Factory Method Pattern

Factory Method Pattern

Factory Method Pattern

Factory Method Pattern

Factory Method Pattern

Factory Method Pattern

Unit 2-Design Patterns.ppt

Unit 2-Design Patterns.ppt

Unit 2-Design Patterns.ppt

Sda 8

Gof design patterns

Gof design patterns

Gof design patterns

Code Like a Ninja Session 7 - Creational Design Patterns

Code Like a Ninja Session 7 - Creational Design Patterns

Code Like a Ninja Session 7 - Creational Design Patterns

Design pattern

Layers of Smalltalk Application

Layers of Smalltalk Application

Layers of Smalltalk Application

Facade pattern presentation(.pptx)

Facade pattern presentation(.pptx)

Facade pattern presentation(.pptx)

Typescript design patterns applied to sharepoint framework - Sharepoint Satur...

Typescript design patterns applied to sharepoint framework - Sharepoint Satur...

Typescript design patterns applied to sharepoint framework - Sharepoint Satur...

Testing the untestable

Testing the untestable

Testing the untestable

How effective is modularization

How effective is modularization

How effective is modularization

Patterns (contd)Software Development ProcessDesign patte.docx

Patterns (contd)Software Development ProcessDesign patte.docx

Patterns (contd)Software Development ProcessDesign patte.docx

Let us understand design pattern

Let us understand design pattern

Let us understand design pattern

Bartlesville Dot Net User Group Design Patterns

Bartlesville Dot Net User Group Design Patterns

Bartlesville Dot Net User Group Design Patterns

Comfortable code

Comfortable code

Comfortable code

Design Patterns

Design Patterns

Design Patterns

Most Useful Design Patterns

Most Useful Design Patterns

Most Useful Design Patterns

Common ASP.NET Design Patterns - Telerik India DevCon 2013

Common ASP.NET Design Patterns - Telerik India DevCon 2013

Common ASP.NET Design Patterns - Telerik India DevCon 2013

Abstract Factory Pattern

1. Abstract Factory Pattern Provide an interface for creating families of related or dependent objects without specifying their concrete classes

2.

3.

4.

5.

6. Abstract Factory using Factory Method

7.

8. Pluggable Factory John Vlissides C++ Report, February 1999

9.

10.

11. Extensible Factories Timothy R. Culp C++ Report, October 1999

12.