Ø Adapter Ø Bridge Ø Composite Ø Decorator Ø Facade Ø Flyweight Ø Proxy

Transkripts

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2 \

3 Ø Ø Adapter Ø Bridge Ø Composite Ø Decorator Ø Facade Ø Flyweight Ø Proxy

4 Ø Ø Structural Pattern

5 Ø Ø Ø Ø Ø

6 Ø Ø Adapter Ø Bridge Ø Composite Ø Decorator Ø Facade Ø Flyweight Ø Proxy

7 Ø Ø

8 Ø Ø Ø Ø

9 Ø Ø Adapter Adaptee Ø Ø

10 Ø Ø Adapter Pattern Wrapper Ø

11 Ø Client Target Adaptee + request () + specificrequest () Adapter + request () specificrequest();

12 Ø Ø public class Adapter extends Adaptee implements Target { } public void request() { specificrequest(); } Client Target Adaptee + request () + specificrequest () Adapter + request () specificrequest();

13 Ø Ø public class Adapter extends Target { private Adaptee adaptee; public Adapter(Adaptee adaptee) { } this.adaptee = adaptee; } public void request() { adaptee.specificrequest(); }

14 Ø Ø cry move

15 Ø Ø Robot Dog + + cry () move () : void : void + + wang () run () : void : void DogAdapter + + cry () move () : void : void

16 Ø Ø adapter

17 Ø Ø

18 Ø Ø Java C#

19 Ø Ø

20 Ø Ø Java JDBC Java SQL Ø JDBC SQL Server Oracle MySQL JDBC JDBC Ø JDBC API

21 Ø Ø Adapter Ø Bridge Ø Composite Ø Decorator Ø Facade Ø Flyweight Ø Proxy

22 Ø Ø 4

23 Ø 1 2

24 Ø Ø Ø

25 Ø

26 Ø Ø Bridge Pattern Ø

27 Ø Client Abstraction + operation () impl Implementor + operationimpl () RefinedAbstraction ConcreteImplementorA ConcreteImplementorB + operation () + operationimpl () + operationimpl ()

28 Ø Ø public interface Implementor { } public void operationimpl(); public abstract class Abstraction { protected Implementor impl; public void setimpl(implementor impl) { } this.impl = impl; } public abstract void operation();

29 Ø Ø public abstract class Abstraction { protected Implementor impl; public void setimpl(implementor impl) { } this.impl = impl; } public abstract void operation();

30 Ø Ø Abstraction Implementation

31 Ø Ø

32 Ø Ø Red + bepaint (String pentype, String name) Green : void # color : Color + + Pen setcolor (Color color) draw (String name) {abstract} : void : void color Color + bepaint (String pentype, String name) : void + bepaint (String pentype, String name) Blue + bepaint (String pentype, String name) White : void : void SmallPen + draw (String name) : void BigPen + draw (String name) : void + bepaint (String pentype, String name) Black + bepaint (String pentype, String name) : void : void MiddlePen + draw (String name) : void

33 Ø Ø bridge

34 Ø Ø

35 Ø Ø

36 Ø Ø

37 Ø Ø (1) JavaJava

38 Ø Ø (2) Java (LookAndFeel) JavaUnix Motif Windows Windows Macintosh MacintoshJava Peer Java AWT GUIPeerAWT Peer

39 Ø Ø

40 Ø Ø

41 Ø Ø Adapter Ø Bridge Ø Composite Ø Decorator Ø Facade Ø Flyweight Ø Proxy

42 Ø Ø WINDOWS s

43 Ø Ø Ø

44 Ø Ø

45 Ø Ø Composite Pattern - Ø

46 Ø Component Client operation () add (Component c) remove (Component c) getchild (int i) Leaf + operation () for(component child:children) { child.operation(); } Composite operation () add (Component c) remove (Component c) getchild (int i) children

47 Ø Ø Ø Ø

48 Ø Ø AbstractElement {abstract} add (AbstractElement element) remove (AbstractElement element) get (int i) method () : void : void : AbstractElement : void list File + method () : void - list : AbstractElement[] Folder add (AbstractElement element) remove (AbstractElement element) get (int i) method () : void : void : AbstractElement : void

49 Ø Ø public abstract class Component { } public abstract void add(component c); public abstract void remove(component c); public abstract Component getchild(int i); public abstract void operation();

50 Ø Ø public class Composite extends Component { private ArrayList list = new ArrayList(); public void add(component c) { list.add(c); } public void remove(component c) { list.remove(c); } public Component getchild(int i) { (Component)list.get(i); } public void operation() { for(object obj : list) { ((Component)obj).operation(); } } }

51 Ø Ø public class Leaf extends Component { } public void add(component c) { // Exception: forbidden operation } public void remove(component c) { // Exception: forbidden operation } public Component getchild(int i) { // Exception: forbidden operation } public void operation() { // Implementation }

52 Ø Ø (Plate) (Apple) (Banana) (Pear)

53 Ø Ø MyElement {abstract} + eat () : void list Apple Banana Pear - list : ArrayList Plate + eat () : void + eat () : void + eat () : void eat () add (MyElement element) remove (MyElement element) : void : void : void

54 Ø Ø (Chapter 12 Composite\sample01)

55 Ø Ø Ø Ø Ø Ø

56 Ø Ø Ø Ø Ø

57 Ø Ø Ø Ø Ø

58 Ø Ø 1 XML <?xml version="1.0"?> <books> <book> </book> <author>carson</author> <price format="dollar">31.95</price> <pubdate>05/01/2001</pubdate> <pubinfo> <publisher>mspress</publisher> </pubinfo> </books> <state>wa</state>

59 Ø Ø 2

60 Ø Ø Adapter Ø Bridge Ø Composite Ø Decorator Ø Facade Ø Flyweight Ø Proxy

61 Ø

62 Ø Ø Ø Ø Decorator

63 Ø Ø

64 Ø Ø Decorator Pattern Responsibility Ø

65 Ø Component + operation () ConcreteComponent Decorator component + operation () component.operation(); + operation () ConcreteDecoratorA - addedstate : + operation () super.operation(); addedbehavior(); ConcreteDecoratorB + + operation () addedbehavior ()

66 Ø Ø Ø

67 Ø Ø public class Decorator extends Component { } private Component component; public Decorator(Component component) { this.component = component; } public void operation() { } component.operation();

68 Ø Ø public class ConcreteDecorator extends Decorator { public ConcreteDecorator(Component component) { super(component); } public void operation() { super.operation(); addedbehavior(); } public void addedbehavior() { // } }

69 Ø Ø

70 Ø Ø

71 Ø Ø (decorator)

72 Ø Ø Ø Ø Ø Ø

73 Ø Ø

74 Ø Ø JList list = new JList(); JScrollPane sp = new JScrollPane(list);

75 Ø Ø 2 JDKJava IO Ø InputStream

76 Ø Ø 2 FilterInputStream protected volatile InputStream in; protected FilterInputStream(InputStream in) { this.in = in; } FileInputStream infs = new FileInputStream("temp/fileSrc.txt"); BufferedInputStream inbs = new BufferedInputStream(inFS); // byte[] data = new byte[1024]; inbs.read(data);

77 Ø Ø Adapter Ø Bridge Ø Composite Ø Decorator Ø Facade Ø Flyweight Ø Proxy

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