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Topic: Facade pattern

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	Memento pattern - Wikipedia, the free encyclopedia
		The memento pattern is a software design pattern that provides the ability to restore an object to its previous state (undo by rollback).
		When using this pattern, care should be taken if the originator may change other objects or resources - the memento pattern operates on a single object.
		Classic examples of the memento pattern include the seed of a pseudorandom number generator and the state in a finite state machine.
	en.wikipedia.org /wiki/Memento_pattern (304 words)

	Facade (Site not responding. Last check: 2007-08-19)
		Facade discusses encapsulating a complex subsystem within a single interface object.
		Mediator is similar to Facade in that it abstracts functionality of existing classes.
		In contrast, Facade defines a simpler interface to a subsystem, it doesn't add new functionality, and it is not known by the subsystem classes.
	home.earthlink.net /~huston2/dp/facade.html (317 words)

	Facade Pattern
		Facades are often implemented with containers, but the pattern is a specific sort of containership.
		Facade, on the other hand, exposes the interface of contained objects to the world, and the point of it is that this way clients don't have to be concerned with exactly which object in a subsystem they're dealing with.
		A facade is a semantic wrapper of existing objects, an extended form of the AdapterPattern.
	c2.com /cgi/wiki?FacadePattern (592 words)

	Philip Roche Software Metrics and OO Design [CA421] Project
		Patterns are the the footprints of design, paving the way for future designs.
		The use of patterns is essentially the reuse of well-understood good solution to a common problem in context.
		Structural patterns indicate how classes and objects may be composed to form larger structures.The Facade pattern is a structural pattern.
	www.redbrick.dcu.ie /~proche/index/projects/seproject.html (1334 words)

	SENG 443 -Software Architectures - Patterns: Facade and Observer
		A behavioral pattern is one that is “concerned with the assignment of responsibilities between objects or encapsulating behavior in an object and delegating requests to it”.
		For the Observer design pattern it provides a quality solution for defining a one-to-many dependency between objects, such that when one object possesses a different state, all of its dependents are notified and changed appropriately automatically.
		A major benefit of the Observer pattern is the decreased level of coupling that occurs between observers and observers and between subjects and observers.
	pages.cpsc.ucalgary.ca /~hannam/SENG443 (4699 words)

	jGuru: Facade pattern
		facade pattern is used to give the client a urified interface.
		A facade is a simpler mask given to a complex entity.
		A facade pattern is based on the basic principle that all the complexities are to be hidden behind a simpler interface.
	www.jguru.com /faq/viewquestion.jsp?EID=386730 (340 words)

	Patterns
		A pattern describes a proven solution to a recurring design problem, placing particular emphasis on the context and forces surrounding the problem, and the consequences and impact of the solution.
		Patterns reflect the experience, knowledge and insights of developers who have successfully used these patterns in their own work.
		A pattern description indicates when the pattern may be applicable, but only experience can provide understanding of when a particular pattern will improve a design.
	java.sun.com /blueprints/patterns (384 words)

	Core J2EE Patterns - Session Facade
		A Session Facade pattern abstracts this complexity and presents the client a simpler interface that is easy to understand and to use.
		A Session Facade is meant to be a highly coarse-grained abstraction of the workflow.
		Since the facade presents a coarse-grained access mechanism to the business components, this reduces the number of business components that are exposed to the client.
	java.sun.com /blueprints/corej2eepatterns/Patterns/SessionFacade.html (3559 words)

	MFCV
		The MFCV pattern is a refinement of the MCV pattern.
		Using the MFCV pattern, coupling between the data model and the UI are kept to a minimum.
		The MFCV pattern is applicable to any program that has a collection of data and a user interface that acts upon that data.
	twinforces.com /tf/docs/MFCV.html (1790 words)

	Architecting on demand solutions, Part 8: Build J2EE applications with IBM Rational Software Architect Enterprise ...
		Patterns assist in building models at a given level of abstraction; using Enterprise Patterns let you construct and maintain applications at a high level of abstraction.
		The pattern instance is used to record the binding of model objects to parameters on the pattern.
		After installation of the Enterprise Patterns, additional rules and transforms were contributed to the UML to EJB transform through extension points defined in the transformation framework.
	www-128.ibm.com /developerworks/ibm/library/i-odoebp8 (2423 words)

	Web services programming tips and tricks: Learn simple, practical Web services design patterns, Part 2
		The facade pattern uses a single high-level application component that serves to encapsulate interactions with subordinate components with the goal of simplifying interactions with the system.
		The goal of the pattern is to achieve the same kind of business logic encapsulation achieved by the command pattern while presenting a less complicated, more user-friendly interface to potential clients.
		The key advantage of the command facade pattern is that it allows the business logic behind a Web service implementation to be encapsulated into distinct objects that are more easily managed and evolved over time.
	www.ibm.com /developerworks/xml/library/ws-tip-altdesign2 (1515 words)

	Facade pattern - Wikipedia, the free encyclopedia
		In computer programming, a facade is an object that provides a simplified interface to a larger body of code, such as a class library.
		make a software library easier to use and understand, since the facade has convenient methods for common tasks;
		The output of the following example which hides parts of a complicate calendar API behind a more userfriendly facade is:
	en.wikipedia.org /wiki/Facade_pattern (254 words)

	PreciseJava.com - Best practices to improve performance in J2EE using Patterns
		Pattern is a solution to a recurring problem in a context.
		Patterns are popularized by the classic book Design Patterns: Elements of Reusable Object-Oriented Software, by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides, also called as GOF (Gang of Four) representing four authors who wrote that book.
		The organization of each Pattern is as follows: initially the problem is described, a solution for that problem is mentioned and links to source code implementation for that pattern is given.
	www.precisejava.com /javaperf/j2ee/Patterns.htm#Patterns101 (2137 words)

	[No title]
		One possible disadvantage to this pattern is that you may lose some functionality contained in the lower level of classes, but this depends on how the facade was designed.
		You, as the program architect, have decided that the facade pattern will be an excelent way to keep the amount of interfacing low, considering the number of possible objects in each room, and the actions that the client has specified.
		You have decided that this will be part of your facade interface since it deals with a large number of classes, but does not really need to bother the programmer with interacting with each of them when a room needs to be prepared.
	www.csc.calpoly.edu /~dbutler/tutorials/winter96/patterns/tutorial.html (760 words)

	Facade Pattern (Site not responding. Last check: 2007-08-19)
		By implementing the simpler interface in terms of the backend interface[s], the facade adds value.
		This is useful when backend API is not sufficiently stable to use as a client API.
		The facade and backend classes are in a separate package from the client.
	www.cs.ucsb.edu /~cappello/50/lectures/patterns/Facade.html (207 words)

	Understanding The Facade Pattern > Overview (Site not responding. Last check: 2007-08-19)
		The Facade pattern puts up a new interface — that is, a facade — in front of the original system.
		I start the study of design patterns with a pattern that you have probably implemented in the past but may not have had a name for: the Facade pattern.
		Explains what the Facade pattern is and where it is used.
	www.informit.com /articles/article.asp?p=347700&seqNum=1 (162 words)

	facade concept from the Object Oriented Software Engineering knowledge base
		Create a special class, called a «Facade», which will simplify the use of the package.
		The «Facade» will contain a simplified set of public methods such that most other subsystems do not need to access the other classes in the package.
		The net result is that the package as a whole is easier to use and has a reduced number of dependencies with other packages.
	www.site.uottawa.ca:4321 /oose/facade.html (318 words)

	JAVA DESIGN PATTERNS, Structural Patterns - Facade Pattern
		Facade as the name suggests means the face of the building.
		All in all, the Façade pattern hides the complexities of system from the client and provides a simpler interface.
		Looking from other side, the facade also provides the implementation to be changed without affecting the client code.
	www.allapplabs.com /java_design_patterns/facade_pattern.htm (463 words)

	Combine the Session Façade pattern with XML (Site not responding. Last check: 2007-08-19)
		In most situations, developers use the Session Façade pattern with Value Object and other related design patterns, but I have found some limitations to this approach in several projects, especially when constructing large and complex systems.
		The Session Façade design pattern uses an enterprise session bean as a façade, which abstracts the underlying business object interactions and provides a uniform, coarse-grained service access layer to clients.
		The solution to our design dilemma is to add a higher-level abstraction layer between the client-tier application and the EJB tier using the Session Façade design pattern, which is implemented as a session bean.
	www.javaworld.com /javaworld/jw-01-2002/jw-0111-facade.html (1031 words)

	jGuru: A question on the Facade Pattern.
		Facade class which uses objects of the database classes and gives a set of functions to the Action Classes.
		Rather having all Action classes call Facade class it's better to have functionaly group business deligation class in between Facade and Action class So then communication happens from Deligater to Facade and can have functional grouping on deligater and re-use from diffrent action classes.
		So It gives the real benifit of facade patter (i.e functional grouping from fron-end to backend) Specialy if the deligater and facade operates remotely (like in two diffrent containers) you have to conside grouping business function call and reduce the cost of network call.
	www.jguru.com /forums/view.jsp?EID=1264075 (392 words)

	Façade clears complexity (Site not responding. Last check: 2007-08-19)
		The Façade design pattern simplifies complex APIs by providing a simplified interface to a complex subsystem.
		Although object-oriented development fails to reduce the complexity of learning a new API, we can use its facilities to implement a design pattern that does: the Façade pattern, where objects known as façades offer a simple interface to complex subsystems so you can do something without knowing the subsystem's particulars.
		The Façade pattern is easy to understand: one class provides a simplified interface to a subsystem.
	www.javaworld.com /javaworld/jw-05-2003/jw-0530-designpatterns.html (979 words)

	Macromedia - Developer Center : Software Design Patterns for Macromedia Flash Remoting (Site not responding. Last check: 2007-08-19)
		This article examines how you can manage this trade-off by applying well-known software design patterns, such as façade and value-object patterns, and illustrates it by means of simple fictional e-commerce website application.
		Common patterns for user interaction such as this can be moved from the client movie to the façade, which simplifies the client and reduces the coupling between the client and the specific back-end components.
		By applying two fairly straightforward design patterns, Façade and Value Object, that are typically used in the C++ and Java worlds to your Macromedia Flash MX and ColdFusion MX application, you have simplified your Macromedia Flash MX client and reduced the amount of network traffic the application generates.
	www.macromedia.com /devnet/mx/flashremoting/articles/facades.html (2005 words)

	Facade & Adapter Pattern Difference
		While you shouldn't worry about the name of a pattern, let's netherless look at a typical Object Adapter and then proceed to a Facade.
		Soon you are stumbling across the Facade pattern, because the motivation to apply the Facade pattern is to simplify an interface.
		For that particular example, the build-in XML-Parser is kind enough to provide some sort of a facade to the underlying system by parsing id-attributes into properties.
	code.audiofarm.de /FacadeAdapterPattern (384 words)

	CS635: Doc 26, Facade and Mediator
		Doc 26, Facade and Mediator Slide # 2
		Subsystems are groups of classes, or groups of classes and other subsystems, that collaborate among themselves to support a set of contracts
		A mediator is responsible for controlling and coordinating the interactions of a group of objects (not data structures)
	www.eli.sdsu.edu /courses/spring98/cs635/notes/facade/facade.html (545 words)

	Facade Design Pattern in C# and VB.NET
		code demonstrates the Facade pattern which provides a simplified and uniform interface to a large subsystem of classes.
		code demonstrates the Facade pattern as a MortgageApplication object which provides a simplified interface to a large subsystem of classes measuring the creditworthyness of an applicant.
		This new code is part of our unique Design Pattern Framework.
	www.dofactory.com /Patterns/PatternFacade.aspx (155 words)

	PHP Design Patterns: The FACADE Pattern - Jim Plush's Programming Paradise
		The first pattern we'll be taking a look at is the "Facade" pattern.
		Using the facade pattern you can create a "Public API" class in your system that contains methods that you want people to have access to, like getPrice(), or getInventory().
		So using the facade pattern you can open up only the parts of your system you want people to use, maintaining a SINGLE point of entry to your application.
	www.litfuel.net /plush?postid=35 (645 words)

	ANU FEIT DCS COMP2110 Lecture 14 (Site not responding. Last check: 2007-08-19)
		According to the textbook, the Facade pattern is primarily for simplifying access to a pre-existing subsytem.
		The general guideline is that to be an instance of a pattern doesn't mean that every single feature in the pattern must be present.
		In the pure Visitor pattern, all responsibility for traversing the tree in a particular order and for all details of how to handle different types of tree nodes is taken by the visitor, while in this version, responsibility is distributed between the renderer and the tree.
	cs.anu.edu.au /student/comp2110/archive-2002/lectures/lec14/lec14.html (1355 words)

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