Crystal의 GoF 디자인 패턴 예제에 대한 UML 다이어그램
36709 단어 umldesignpatternscrystalgof
목차
책임의 사슬
Pattern Intent
Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
A trouble is turned around among supporters, and the trouble will be handled by the supporter who can handle it. There are four types of supporters below:
- LazySupporter doesn't handle any trouble
- MoodySupporter handles odd ID troubles
- SpecialSupporter handles a trouble of the target ID.
- LimitedSupporter handles troubles below the limit ID.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
명령
Pattern Intent
Encapsulate a request as an object, thereby letting you parametrize clients with different requests, queue or log requests, and support undoable operations (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Simple drawing application:
- Draw a path with points by dragging the mouse.
- Revert to one previous drawing by pressing the Undo button.
- Erase all drawing by pressing the Clear button.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
통역사
Pattern Intent
Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
An interpreter for mini language to operate radio controlled car. It parses the following syntax composed of "forward", "left", "right", and "repeat" commands:
<program> ::= program <command list>
<command list> ::= <command>* end
<command> ::= <repeat> | <action>
<repeat> ::= repeat <number> <command list>
<action> ::= forward | right | left
<number> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
반복자
Pattern Intent
Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Add books in a bookshelf and display the names of the book in turn.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
중재인
Pattern Intent
Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Show a login dialog for entering a username and password. The dialog has the following elements:
- "Guest" and "Login" radio buttons
- "Username" and "Password" text fields
- "OK" and "Cancel" buttons
And change the editable properties of the elements depending on the state of the radio buttons and text fields.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
기념물
Pattern Intent
Without violating encapsulation, capture and externalize an object's internal state so that the object can be returned to this state later (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
A dice game in which money increases and decreases:
- A gamer shakes a dice and the number determine the next state.
- If the number of dice is even, gamer's money doubles, and if it is odd, gamer's money is halved.
- If the gamer's money is less than half of the highest amount, it returns to the highest amount.
- The game is repeated
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
관찰자
Pattern Intent
Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Observers observe a Subject object holding a numerical value and display the value. The display formats are digits and bar charts.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
상태
Pattern Intent
Allow an object to alter its behavior when its internal state changes. The object will appear to change its class (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Safe security system that the security status changes with time. When you press a button in a dialog, the message displayed will change depending on whether the time is day or night. The internal time of the dialog advances one hour for every second of real time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
전략
Pattern Intent
Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from the clients that use it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
A game of rock-scissors-paper. Two strategies are available:
- Random Strategy: showing a random hand signal.
- Mirror Strategy: showing a hand signal from the previous opponent's hand signal.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
템플릿 방법
Pattern Intent
Define the skeleton of an algorithm in an operation, deferring some steps to client subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a character or string repeatedly 5 times.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
방문객
Pattern Intent
Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Visitor visits the file system composed of files and directories, and displays a list of files/directories.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
추상 공장
Pattern Intent
Provide an interface for creating families of related or dependent objects without specifying their concrete classes (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a hierarchical link collection as an HTML file. It can be created in either tabular or list format.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
빌더
Pattern Intent
Separate the construction of a complex object from its representation so that the same construction process can create different representations (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create documents in HTML format and text format. It is possible to create different documents in the same construction process.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
공장 방법
Pattern Intent
Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
The subject is a factory to make credit cards. The Factory defines how to create an credit card, but the actual credit card is created by the CreditCardFactory. The "createProduct()" is called a Factory Method, and it is responsible for manufacturing an object.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
원기
Pattern Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string enclosed with a frame line, or drawn with an underline. The Client (Main) registers instances of the Display subclass in the Manager class. When necessary, the Manager class asks those registered instances to return a clone. The Client (Main) requires the returned clones to display.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
하나씩 일어나는 것
Pattern Intent
Ensure a class has only one instance, and provide a global point of access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Check whether the same instance is obtained.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
어댑터
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display the given string as follows
-- Nice to meet you --
or display it as follows.
[[ Nice to meet you ]]
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
다리
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display only one line or display the specified number of lines.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it (Design Patterns: Elements of Reusable Object-Oriented Software).
Pattern Intent
Encapsulate a request as an object, thereby letting you parametrize clients with different requests, queue or log requests, and support undoable operations (Design Patterns: Elements of Reusable Object-Oriented Software).
Simple drawing application:
- Draw a path with points by dragging the mouse.
- Revert to one previous drawing by pressing the Undo button.
- Erase all drawing by pressing the Clear button.
크리스탈 코드: View on GitHub
Open the diagram in full screen
통역사
Pattern Intent
Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
An interpreter for mini language to operate radio controlled car. It parses the following syntax composed of "forward", "left", "right", and "repeat" commands:
<program> ::= program <command list>
<command list> ::= <command>* end
<command> ::= <repeat> | <action>
<repeat> ::= repeat <number> <command list>
<action> ::= forward | right | left
<number> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
반복자
Pattern Intent
Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Add books in a bookshelf and display the names of the book in turn.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
중재인
Pattern Intent
Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Show a login dialog for entering a username and password. The dialog has the following elements:
- "Guest" and "Login" radio buttons
- "Username" and "Password" text fields
- "OK" and "Cancel" buttons
And change the editable properties of the elements depending on the state of the radio buttons and text fields.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
기념물
Pattern Intent
Without violating encapsulation, capture and externalize an object's internal state so that the object can be returned to this state later (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
A dice game in which money increases and decreases:
- A gamer shakes a dice and the number determine the next state.
- If the number of dice is even, gamer's money doubles, and if it is odd, gamer's money is halved.
- If the gamer's money is less than half of the highest amount, it returns to the highest amount.
- The game is repeated
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
관찰자
Pattern Intent
Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Observers observe a Subject object holding a numerical value and display the value. The display formats are digits and bar charts.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
상태
Pattern Intent
Allow an object to alter its behavior when its internal state changes. The object will appear to change its class (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Safe security system that the security status changes with time. When you press a button in a dialog, the message displayed will change depending on whether the time is day or night. The internal time of the dialog advances one hour for every second of real time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
전략
Pattern Intent
Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from the clients that use it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
A game of rock-scissors-paper. Two strategies are available:
- Random Strategy: showing a random hand signal.
- Mirror Strategy: showing a hand signal from the previous opponent's hand signal.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
템플릿 방법
Pattern Intent
Define the skeleton of an algorithm in an operation, deferring some steps to client subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a character or string repeatedly 5 times.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
방문객
Pattern Intent
Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Visitor visits the file system composed of files and directories, and displays a list of files/directories.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
추상 공장
Pattern Intent
Provide an interface for creating families of related or dependent objects without specifying their concrete classes (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a hierarchical link collection as an HTML file. It can be created in either tabular or list format.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
빌더
Pattern Intent
Separate the construction of a complex object from its representation so that the same construction process can create different representations (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create documents in HTML format and text format. It is possible to create different documents in the same construction process.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
공장 방법
Pattern Intent
Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
The subject is a factory to make credit cards. The Factory defines how to create an credit card, but the actual credit card is created by the CreditCardFactory. The "createProduct()" is called a Factory Method, and it is responsible for manufacturing an object.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
원기
Pattern Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string enclosed with a frame line, or drawn with an underline. The Client (Main) registers instances of the Display subclass in the Manager class. When necessary, the Manager class asks those registered instances to return a clone. The Client (Main) requires the returned clones to display.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
하나씩 일어나는 것
Pattern Intent
Ensure a class has only one instance, and provide a global point of access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Check whether the same instance is obtained.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
어댑터
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display the given string as follows
-- Nice to meet you --
or display it as follows.
[[ Nice to meet you ]]
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
다리
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display only one line or display the specified number of lines.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language (Design Patterns: Elements of Reusable Object-Oriented Software).
<program> ::= program <command list>
<command list> ::= <command>* end
<command> ::= <repeat> | <action>
<repeat> ::= repeat <number> <command list>
<action> ::= forward | right | left
<number> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
Pattern Intent
Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation (Design Patterns: Elements of Reusable Object-Oriented Software).
Add books in a bookshelf and display the names of the book in turn. Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
중재인
Pattern Intent
Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Show a login dialog for entering a username and password. The dialog has the following elements:
- "Guest" and "Login" radio buttons
- "Username" and "Password" text fields
- "OK" and "Cancel" buttons
And change the editable properties of the elements depending on the state of the radio buttons and text fields.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
기념물
Pattern Intent
Without violating encapsulation, capture and externalize an object's internal state so that the object can be returned to this state later (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
A dice game in which money increases and decreases:
- A gamer shakes a dice and the number determine the next state.
- If the number of dice is even, gamer's money doubles, and if it is odd, gamer's money is halved.
- If the gamer's money is less than half of the highest amount, it returns to the highest amount.
- The game is repeated
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
관찰자
Pattern Intent
Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Observers observe a Subject object holding a numerical value and display the value. The display formats are digits and bar charts.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
상태
Pattern Intent
Allow an object to alter its behavior when its internal state changes. The object will appear to change its class (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Safe security system that the security status changes with time. When you press a button in a dialog, the message displayed will change depending on whether the time is day or night. The internal time of the dialog advances one hour for every second of real time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
전략
Pattern Intent
Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from the clients that use it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
A game of rock-scissors-paper. Two strategies are available:
- Random Strategy: showing a random hand signal.
- Mirror Strategy: showing a hand signal from the previous opponent's hand signal.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
템플릿 방법
Pattern Intent
Define the skeleton of an algorithm in an operation, deferring some steps to client subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a character or string repeatedly 5 times.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
방문객
Pattern Intent
Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Visitor visits the file system composed of files and directories, and displays a list of files/directories.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
추상 공장
Pattern Intent
Provide an interface for creating families of related or dependent objects without specifying their concrete classes (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a hierarchical link collection as an HTML file. It can be created in either tabular or list format.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
빌더
Pattern Intent
Separate the construction of a complex object from its representation so that the same construction process can create different representations (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create documents in HTML format and text format. It is possible to create different documents in the same construction process.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
공장 방법
Pattern Intent
Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
The subject is a factory to make credit cards. The Factory defines how to create an credit card, but the actual credit card is created by the CreditCardFactory. The "createProduct()" is called a Factory Method, and it is responsible for manufacturing an object.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
원기
Pattern Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string enclosed with a frame line, or drawn with an underline. The Client (Main) registers instances of the Display subclass in the Manager class. When necessary, the Manager class asks those registered instances to return a clone. The Client (Main) requires the returned clones to display.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
하나씩 일어나는 것
Pattern Intent
Ensure a class has only one instance, and provide a global point of access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Check whether the same instance is obtained.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
어댑터
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display the given string as follows
-- Nice to meet you --
or display it as follows.
[[ Nice to meet you ]]
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
다리
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display only one line or display the specified number of lines.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently (Design Patterns: Elements of Reusable Object-Oriented Software).
Pattern Intent
Without violating encapsulation, capture and externalize an object's internal state so that the object can be returned to this state later (Design Patterns: Elements of Reusable Object-Oriented Software).
A dice game in which money increases and decreases:
- A gamer shakes a dice and the number determine the next state.
- If the number of dice is even, gamer's money doubles, and if it is odd, gamer's money is halved.
- If the gamer's money is less than half of the highest amount, it returns to the highest amount.
- The game is repeated
크리스탈 코드: View on GitHub
Open the diagram in full screen
관찰자
Pattern Intent
Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Observers observe a Subject object holding a numerical value and display the value. The display formats are digits and bar charts.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
상태
Pattern Intent
Allow an object to alter its behavior when its internal state changes. The object will appear to change its class (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Safe security system that the security status changes with time. When you press a button in a dialog, the message displayed will change depending on whether the time is day or night. The internal time of the dialog advances one hour for every second of real time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
전략
Pattern Intent
Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from the clients that use it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
A game of rock-scissors-paper. Two strategies are available:
- Random Strategy: showing a random hand signal.
- Mirror Strategy: showing a hand signal from the previous opponent's hand signal.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
템플릿 방법
Pattern Intent
Define the skeleton of an algorithm in an operation, deferring some steps to client subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a character or string repeatedly 5 times.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
방문객
Pattern Intent
Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Visitor visits the file system composed of files and directories, and displays a list of files/directories.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
추상 공장
Pattern Intent
Provide an interface for creating families of related or dependent objects without specifying their concrete classes (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a hierarchical link collection as an HTML file. It can be created in either tabular or list format.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
빌더
Pattern Intent
Separate the construction of a complex object from its representation so that the same construction process can create different representations (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create documents in HTML format and text format. It is possible to create different documents in the same construction process.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
공장 방법
Pattern Intent
Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
The subject is a factory to make credit cards. The Factory defines how to create an credit card, but the actual credit card is created by the CreditCardFactory. The "createProduct()" is called a Factory Method, and it is responsible for manufacturing an object.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
원기
Pattern Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string enclosed with a frame line, or drawn with an underline. The Client (Main) registers instances of the Display subclass in the Manager class. When necessary, the Manager class asks those registered instances to return a clone. The Client (Main) requires the returned clones to display.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
하나씩 일어나는 것
Pattern Intent
Ensure a class has only one instance, and provide a global point of access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Check whether the same instance is obtained.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
어댑터
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display the given string as follows
-- Nice to meet you --
or display it as follows.
[[ Nice to meet you ]]
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
다리
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display only one line or display the specified number of lines.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically (Design Patterns: Elements of Reusable Object-Oriented Software).
Pattern Intent
Allow an object to alter its behavior when its internal state changes. The object will appear to change its class (Design Patterns: Elements of Reusable Object-Oriented Software).
Safe security system that the security status changes with time. When you press a button in a dialog, the message displayed will change depending on whether the time is day or night. The internal time of the dialog advances one hour for every second of real time. Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
전략
Pattern Intent
Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from the clients that use it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
A game of rock-scissors-paper. Two strategies are available:
- Random Strategy: showing a random hand signal.
- Mirror Strategy: showing a hand signal from the previous opponent's hand signal.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
템플릿 방법
Pattern Intent
Define the skeleton of an algorithm in an operation, deferring some steps to client subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a character or string repeatedly 5 times.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
방문객
Pattern Intent
Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Visitor visits the file system composed of files and directories, and displays a list of files/directories.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
추상 공장
Pattern Intent
Provide an interface for creating families of related or dependent objects without specifying their concrete classes (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a hierarchical link collection as an HTML file. It can be created in either tabular or list format.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
빌더
Pattern Intent
Separate the construction of a complex object from its representation so that the same construction process can create different representations (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create documents in HTML format and text format. It is possible to create different documents in the same construction process.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
공장 방법
Pattern Intent
Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
The subject is a factory to make credit cards. The Factory defines how to create an credit card, but the actual credit card is created by the CreditCardFactory. The "createProduct()" is called a Factory Method, and it is responsible for manufacturing an object.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
원기
Pattern Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string enclosed with a frame line, or drawn with an underline. The Client (Main) registers instances of the Display subclass in the Manager class. When necessary, the Manager class asks those registered instances to return a clone. The Client (Main) requires the returned clones to display.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
하나씩 일어나는 것
Pattern Intent
Ensure a class has only one instance, and provide a global point of access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Check whether the same instance is obtained.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
어댑터
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display the given string as follows
-- Nice to meet you --
or display it as follows.
[[ Nice to meet you ]]
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
다리
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display only one line or display the specified number of lines.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from the clients that use it (Design Patterns: Elements of Reusable Object-Oriented Software).
Pattern Intent
Define the skeleton of an algorithm in an operation, deferring some steps to client subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure (Design Patterns: Elements of Reusable Object-Oriented Software).
Display a character or string repeatedly 5 times. Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
방문객
Pattern Intent
Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Visitor visits the file system composed of files and directories, and displays a list of files/directories.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
추상 공장
Pattern Intent
Provide an interface for creating families of related or dependent objects without specifying their concrete classes (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a hierarchical link collection as an HTML file. It can be created in either tabular or list format.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
빌더
Pattern Intent
Separate the construction of a complex object from its representation so that the same construction process can create different representations (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create documents in HTML format and text format. It is possible to create different documents in the same construction process.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
공장 방법
Pattern Intent
Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
The subject is a factory to make credit cards. The Factory defines how to create an credit card, but the actual credit card is created by the CreditCardFactory. The "createProduct()" is called a Factory Method, and it is responsible for manufacturing an object.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
원기
Pattern Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string enclosed with a frame line, or drawn with an underline. The Client (Main) registers instances of the Display subclass in the Manager class. When necessary, the Manager class asks those registered instances to return a clone. The Client (Main) requires the returned clones to display.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
하나씩 일어나는 것
Pattern Intent
Ensure a class has only one instance, and provide a global point of access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Check whether the same instance is obtained.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
어댑터
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display the given string as follows
-- Nice to meet you --
or display it as follows.
[[ Nice to meet you ]]
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
다리
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display only one line or display the specified number of lines.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates (Design Patterns: Elements of Reusable Object-Oriented Software).
Pattern Intent
Provide an interface for creating families of related or dependent objects without specifying their concrete classes (Design Patterns: Elements of Reusable Object-Oriented Software).
Create a hierarchical link collection as an HTML file. It can be created in either tabular or list format. Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
빌더
Pattern Intent
Separate the construction of a complex object from its representation so that the same construction process can create different representations (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create documents in HTML format and text format. It is possible to create different documents in the same construction process.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
공장 방법
Pattern Intent
Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
The subject is a factory to make credit cards. The Factory defines how to create an credit card, but the actual credit card is created by the CreditCardFactory. The "createProduct()" is called a Factory Method, and it is responsible for manufacturing an object.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
원기
Pattern Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string enclosed with a frame line, or drawn with an underline. The Client (Main) registers instances of the Display subclass in the Manager class. When necessary, the Manager class asks those registered instances to return a clone. The Client (Main) requires the returned clones to display.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
하나씩 일어나는 것
Pattern Intent
Ensure a class has only one instance, and provide a global point of access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Check whether the same instance is obtained.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
어댑터
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display the given string as follows
-- Nice to meet you --
or display it as follows.
[[ Nice to meet you ]]
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
다리
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display only one line or display the specified number of lines.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Separate the construction of a complex object from its representation so that the same construction process can create different representations (Design Patterns: Elements of Reusable Object-Oriented Software).
Pattern Intent
Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses (Design Patterns: Elements of Reusable Object-Oriented Software).
The subject is a factory to make credit cards. The Factory defines how to create an credit card, but the actual credit card is created by the CreditCardFactory. The "createProduct()" is called a Factory Method, and it is responsible for manufacturing an object. Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
원기
Pattern Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string enclosed with a frame line, or drawn with an underline. The Client (Main) registers instances of the Display subclass in the Manager class. When necessary, the Manager class asks those registered instances to return a clone. The Client (Main) requires the returned clones to display.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
하나씩 일어나는 것
Pattern Intent
Ensure a class has only one instance, and provide a global point of access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Check whether the same instance is obtained.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
어댑터
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display the given string as follows
-- Nice to meet you --
or display it as follows.
[[ Nice to meet you ]]
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
다리
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display only one line or display the specified number of lines.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype (Design Patterns: Elements of Reusable Object-Oriented Software).
Pattern Intent
Ensure a class has only one instance, and provide a global point of access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
Check whether the same instance is obtained. Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
어댑터
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display the given string as follows
-- Nice to meet you --
or display it as follows.
[[ Nice to meet you ]]
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
다리
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display only one line or display the specified number of lines.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces (Design Patterns: Elements of Reusable Object-Oriented Software).
-- Nice to meet you --
[[ Nice to meet you ]]
Pattern Intent
Decouple an abstraction from its implementation so that the two can vary independently (Design Patterns: Elements of Reusable Object-Oriented Software).
Display only one line or display the specified number of lines. Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
합성물
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Represents a file system composed of files and directories. FileSystemElement makes it possible to treat File and Directory uniformly.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
데코레이터
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string with decorative frames. The frames can be combined arbitrarily.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Compose objects into tree structures to represent whole-part hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly (Design Patterns: Elements of Reusable Object-Oriented Software).
Pattern Intent
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality (Design Patterns: Elements of Reusable Object-Oriented Software).
Display a string with decorative frames. The frames can be combined arbitrarily. Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
정면
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Create a simple homepage through a Facade (PageCreator). The Facade gets info from the DataLibrary and uses the info to create an HTML file.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
플라이급
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use (Design Patterns: Elements of Reusable Object-Oriented Software).
Pattern Intent
Use sharing to support large numbers of fine-grained objects efficiently (Design Patterns: Elements of Reusable Object-Oriented Software).
Display a string consisting of large characters (0-9 digits only). Large character objects are not created until they are needed. And the created objects are reused. Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
대리
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
About This Example
Print on a named printer. Setting and changing the printer name is done by Proxy (ProxyPrinter). At the time of printing, create an instance of the RealSubject (RealPrinter) for the first time.
Execution Result:
크리스탈 코드: View on GitHub
Open the diagram in full screen
참조
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Pattern Intent
Provide a surrogate or placeholder for another object to control access to it (Design Patterns: Elements of Reusable Object-Oriented Software).
- Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
- Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004
연결
Reference
이 문제에 관하여(Crystal의 GoF 디자인 패턴 예제에 대한 UML 다이어그램), 우리는 이곳에서 더 많은 자료를 발견하고 링크를 클릭하여 보았다 https://dev.to/takaakit/uml-diagram-for-gof-design-pattern-examples-in-crystal-4j0f텍스트를 자유롭게 공유하거나 복사할 수 있습니다.하지만 이 문서의 URL은 참조 URL로 남겨 두십시오.
우수한 개발자 콘텐츠 발견에 전념
(Collection and Share based on the CC Protocol.)
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