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Topic: Factory method pattern

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	Core J2EE Patterns - Data Access Object
		The DataAccessObject is the primary object of this pattern.
		For added flexibility, the Abstract Factory pattern may be employed as discussed in the strategies.
		The DAO pattern is related to the Broker pattern, which describes approaches for decoupling clients and servers in distributed systems.
	java.sun.com /blueprints/corej2eepatterns/Patterns/DataAccessObject.html (2846 words)

	Singleton pattern - Wikipedia, the free encyclopedia
		The singleton pattern is implemented by creating a class with a method that creates a new instance of the object if one does not exist.
		The singleton pattern is often used in conjunction with the factory method pattern to create a system-wide resource whose specific type is not known to the code that uses it.
		The toolkit methods must be implemented in an object and not as static methods of a class because the specific implementation is not known by the platform-independent components.
	en.wikipedia.org /wiki/Singleton_pattern (943 words)

	Factory method pattern - Wikipedia, the free encyclopedia
		Factory Method, one of the patterns from the Design Patterns book, handles this problem by defining a separate method for creating the objects, which subclasses can then override to specify the derived type of product that will be created.
		Factory Methods are common in toolkits and frameworks where library code needs to create objects of types which may be subclassed by applications using the framework.
		When factory methods are used for disambiguation like this, the constructor is often made private to force clients to use the factory methods.
	en.wikipedia.org /wiki/Factory_method_pattern (902 words)

	file_nav_name Encyclopedia Index
		Empirical method is generally meant as the collection of a large amount of data on which to base a theory or derive a co...
		In mathematics, the steepest descent method or saddle-point approximation is a method used to approximate integrals of...
		The Nelder-Mead method or Simplex method or downhill simplex method is a commonly used nonlinear optimisation alg...
	www.brainyencyclopedia.com /topics/method.html (8451 words)

	Design Pattern Synopses
		The Filter pattern is a special case of the Decorator pattern, where a data source or data sink object is wrapped to add logic to the handling of a data stream.
		The Composite pattern also allows the objects in the tree to be manipulated in a consistent manner, by requiring all of the objects in the tree to have a common superclass or interface.
		The Template Method pattern is an alternative to the Decorator pattern that allows variable behavior in the middle of a method call instead of before or after it.
	www.mindspring.com /~mgrand/pattern_synopses.htm (4381 words)

	Factory method design pattern
		A possible disadvantage of the factory method is that the client might have to subclass the Manufacturer class to create a particular ConcreteVehicle object.
		Design patterns such as the factory method are important because they give you an idea to solve a recurrent problem.
		We feel the factory method is a fundamental pattern to use because it is both simple and powerful.
	sern.ucalgary.ca /courses/seng/443/F2004/patternNotes/Marsh_Richelhof_&_Liew (2003 words)

	Factory Patterns in C# (Site not responding. Last check: )
		The Factory Method provides a simple decision making class that can return the object of one of several subclasses of an abstract base class depending on the information that are provided.
		A factory pattern is one that returns an instance of one of several possible classes depending on the data provided to it.
		Instead we are using the getObject() method of the Factory class to return an appropriate instance depending on the value passed to the getObject() method.
	www.c-sharpcorner.com /Language/FactoryPatternsinCSRVS.asp (421 words)

	Abstract factory pattern - Wikipedia, the free encyclopedia
		The factory determines the actual concrete type of object to be created, and it is here that the object is actually created (in C++, for instance, by the new operator).
		As the factory only returns an abstract pointer, the client code (which requested the object from the factory) does not know - and is not burdened by - the actual concrete type of the object which was just created.
		If all factory objects are stored globally in a singleton object, and all client code goes through the singleton to access the proper factory for object creation, then changing factories is as easy as changing the singleton object.
	en.wikipedia.org /wiki/Abstract_factory_pattern (778 words)

	Factory method design pattern (Site not responding. Last check: )
		The second variation of the factory method pattern is the Manufacturer class is a concrete class and provides a default implementation for the factory method (Gamma et al., 1995).
		One drawback of the factory method is that it may have to subclass the creator classes, which causes there to be more classes overall.
		Even though the factory method has some drawbacks such as the one mentioned above, we feel that it is a pattern that should be used by all because the advantages of using this pattern outweigh the disadvantages.
	pages.cpsc.ucalgary.ca /~ansella/seng443 (2003 words)

	design:the_factory_method [phpPatterns]
		The factory method is one of the fundamental patterns which is both simple and powerful, helping us to delegate responsibilities to other classes and keep code easy to maintain.
		The factory method is a creational method; a method in a class (or even just a PHP function) which returns instances of new classes.
		A handy trick in some cases, when using the factory method, is to create the product class and pass it an instance of the creator class at the same time, allowing the product to have access to the creator.
	www.phppatterns.com /docs/design/the_factory_method (678 words)

	ONDotnet.com -- The Factory Design Pattern
		Factory methods can encapsulate the logic required to return a singleton instance of the class requested, or they can return an instance of the requested class from a pool of instances.
		Factory methods can return any subtype of the type requested, and can require that clients refer to the returned object by its interface, rather than the implementation class.
		Factory methods come into play when different types of objects need to be instantiated, based on the type of incoming request.
	www.windowsdevcenter.com /pub/a/dotnet/2003/08/11/factorypattern.html (1908 words)

	The Factory Method Design Pattern by Gopalan Suresh Raj
		The Factory Pattern is all about "Define an interface for creating an object, but let the subclasses decide which class to instantiate.
		The Factory method lets a class defer instantiation to subclasses" Thus, as defined by Gamma et al, "The Factory Method lets a class defer instantiation to subclasses".
		A potential problem with factory methods is that they might force you to subclass just to create the appropriate Objects.
	gsraj.tripod.com /design/creational/factory/factory.html (1693 words)

	Design Pattern Synopses from Patterns in Java, Volume 1 Second Edition
		The Filter pattern is a special case of the Decorator pattern, where a data source or data sink object is wrapped to add logic to the handling of a data stream.
		The Composite pattern also allows the objects in the tree to be manipulated in a consistent manner, by requiring all of the objects in the tree to have a common superclass or interface.
		The Decorator pattern extends the functionality of an object in a way that is transparent to its clients, by implementing the same interface as the original class and delegating operations to the original class.
	www.markgrand.com /pattern_synopses1_2ed.html (5418 words)

	Factory Method (Site not responding. Last check: )
		Factory Method is to creating objects as Template Method is to implementing an algorithm.
		Factory Method is similar to Abstract Factory but without the emphasis on families.
		Factory Methods are routinely specified by an architectural framework, and then implemented by the user of the framework.
	home.earthlink.net /~huston2/dp/factoryMethod.html (327 words)

	ONDotnet.com -- The Factory Design Pattern
		Factory methods can encapsulate the logic required to return a singleton instance of the class requested, or they can return an instance of the requested class from a pool of instances.
		Factory methods can return any subtype of the type requested, and can require that clients refer to the returned object by its interface, rather than the implementation class.
		Factory methods come into play when different types of objects need to be instantiated, based on the type of incoming request.
	www.ondotnet.com /pub/a/dotnet/2003/08/11/factorypattern.html (1908 words)

	Introduction to Design Patterns in Delphi
		This pattern is useful when you want to encapsulate the construction of a class and isolate knowledge of the concrete class from the client application through an abstract interface.
		Methods declared as virtual or dynamic let you change their behaviour using override in a descendant class.
		When a method is overridden, a call to the parent class's method actually executes the override method in the real class of the object.
	www.obsof.com /delphi_tips/pattern.html (3216 words)

	[No title] (Site not responding. Last check: )
		Factory methods allow you to create an application framework without needing to bind application-specific classes into your code.
		As you'll see later in the tutorial, the CreateMaze method does not need to be changed by subclasses of MazeGame, just the different Factory Methods are changed to provide different types of rooms, walls, and doors.
		The Factory Method design pattern allows you to write applications that are more flexible in what types they can incorporate by deferring creation of classes within the system to subclasses that can be extended as the object model is extended.
	www.devhood.com /tutorials/tutorial_details.aspx?tutorial_id=645 (1486 words)

	Design-Patterns-in-VB at Programmers Heaven
		Design Patterns in VB.NET is specifically designed to help Software Architects and Programmers to take advantage of Gang of Four (GoF) design patterns so that they can build object-oriented software which is flexible, reusable and easy to maintain.
		We introduce the reader to creational patterns and compare the way in which a nutritionist operates, to the workings of some of the creational patterns and how this can help the reader to visualize the workings of the patterns better.
		Factory Method is an often misunderstood pattern, both in its intent and implementation.
	www.programmersheaven.com /2/Design-Patterns-in-VB (1696 words)

	[No title] (Site not responding. Last check: )
		The Abstract Factory encapsulates all of the Factory Methods in a separate class, so that's there's a distinct separation between them and the system code that uses those methods and the classes they create.
		The Abstract Factory is used to develop frameworks and systems that can be configured with one of multiple families of products, an example would be having separate factories for different user interface classes for controls on Windows versus controls on another operating system.
		It isolates these methods from the MazeGame class the way that it was defined in the Factory Method tutorial.
	www.devhood.com /tutorials/tutorial_details.aspx?tutorial_id=654 (1085 words)

	Factory Method (Site not responding. Last check: )
		The idea behind the pattern is that you give the class a virtual "CreateProduct" method (which it may or may not implement).
		A potential use of the pattern would be not to hide what type of object gets created, but rather how the object gets created.
		We debated whether this is an implementation of factory method.
	www.melbournepatterns.org /minutes/Factory_Method.htm (540 words)

	[No title] (Site not responding. Last check: )
		Factory Methods are used to create an object, but let subclasses decide which class to instantiate.
		Subclasses of Toolkit are used to bind the various components to particular native toolkit implementations using a factory method.
		The methods defined by Toolkit are the "glue" that joins the platform-independent classes in the java.awt package with their counterparts in java.awt.peer.
	www.unf.edu /~jgaudry/Courses/ds/patterns/FactoryMethod.html (404 words)

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