[DesignPattern - Bridge] sample1

Design Pattern - Builder

1. 클래스다이어그램

2. Source

• Display.java

  package com.dazzilove.bridge.smaple1;
  
  public class Display {
    private DisplayImpl displayImpl;
    
    public Display(DisplayImpl displayImpl) {
      this.displayImpl = displayImpl;
    }
    
    public void open() {
      displayImpl.rawOpen();
    }
    
    public void print() {
      displayImpl.rawPrint();
    }
    
    public void close() {
      displayImpl.rawClose();
    }
    
    public final void display() {
      open();
      print();
      close();
    }
  }

• CountDisplay.java

  package com.dazzilove.bridge.smaple1;
  
  public class CountDisplay extends Display {
    public CountDisplay(DisplayImpl displayImpl) {
      super(displayImpl);
    }
    
    public void multiDisplay(int times) {
      open();
      for(int i=0; i      print();
      }
      close();
    }
  }

• DisplayImpl.java

  package com.dazzilove.bridge.smaple1;
  
  public abstract class DisplayImpl {
    public abstract void rawOpen();
    public abstract void rawPrint();
    public abstract void rawClose();
  }

• StringDisplayImpl.java

  package com.dazzilove.bridge.smaple1;
  
  public class StringDisplayImpl extends DisplayImpl {
    private String string;
    private int width;
    
    public StringDisplayImpl(String string) {
      this.string = string;
      this.width = string.getBytes().length;
    }
  
    @Override
    public void rawOpen() {
      printLine();
    }
  
    @Override
    public void rawPrint() {
      System.out.println("|" + string + " |");
    }
  
    @Override
    public void rawClose() {
      printLine();
    }
    
    private void printLine() {
      System.out.print("+");
      for(int i=0; i      System.out.print("-");
      }
      System.out.println("+");
    }
  }

• Main.java

  package com.dazzilove.bridge.smaple1;
  
  public class Main {
    public static void main(String[] args) {
      Display d1 = new Display(new StringDisplayImpl("Hello, Korea."));
      Display d2 = new CountDisplay(new StringDisplayImpl("Hello, World."));
      CountDisplay d3 = new CountDisplay(new StringDisplayImpl("Hellow, Universe."));
      
      d1.display();
      d2.display();
      d3.display();
      d3.multiDisplay(5);
    }
  }

3. 결과출력