架构 1 期第三周作业一

/**
 * 组件接口
 */
public interface Component {
    String name();
    ComponentPrinter getComponentPrinter();
}
/**
 * 容器组件:具有子元素的组件
 */
public interface ContainerComponent extends Component {
    List<Component> getChildList();
    void addChildComponent(Component child);
}
//组件打印器 接口
public interface ComponentPrinter{
	void print(Component component);  
}
//默认打印器
public class DefaultComponentPrinter implements ComponentPrinter {
    @Override
    public void print(Component component) {
        //打印component的name
        doPrint(component.name());
        //如果是容器组件，遍历子元素打印
        if (component instanceof ContainerComponent) {
            List<Component> childList = ((ContainerComponent) component).getChildList();
            if (childList != null) {
                for (Component item : childList) {
                    //调用组件自身打印器 打印
                    item.getComponentPrinter().print(item);
                }
            }
        }
    }
    /**
     * 执行打印
     */
    private void doPrint(String content) {
        System.out.println("print " + content);
    }
}
/**
 * 组件 抽象实现类
 */
public abstract class BaseComponent implements Component {
    protected String name;
    protected ComponentPrinter componentPrinter;
    
    public BaseComponent(String name) {
        this.name = name;
        this.componentPrinter = new DefaultComponentPrinter();
    }
    public BaseComponent() {
    }
    @Override
    public String name() {
        return this.getClass().getSimpleName() + "(" + name + ")";
    }
    @Override
    public ComponentPrinter getComponentPrinter() {
        return componentPrinter;
    }
}
/**
 * 容器组件 抽象实现类
 */
public abstract class BaseContainerComponent extends BaseComponent implements ContainerComponent {
    protected List<Component> childList;
    
    public BaseContainerComponent(String name) {
        super(name);
        this.childList = new ArrayList<>();
    }
    @Override
    public List<Component> getChildList() {
        return childList;
    }
    @Override
    public void addChildComponent(Component child) {
        if (childList == null) {
            childList = new ArrayList<>();
        }
        childList.add(child);
    }
}
/**
 * 窗口组件-is a 容器组件
 */
public class WinForm extends BaseContainerComponent {
    public WinForm(String name) {
        super(name);
    }
}
/**
 * 按钮 是一个组件
 */
public class Button extends BaseComponent {
    public Button(String name) {
        super(name);
    }
}

public static void main(String[] args) {
        ContainerComponent windowForm = new WinForm("WINDOW窗口");
        Component picture = new Picture("LOGO图片");
        windowForm.addChildComponent(picture);
				//windowForm添加子组件
        Component loginButton = new Picture("登录");
        windowForm.addChildComponent(loginButton);
        ContainerComponent frame = new Frame("FRAME1");
  			//windowForm 添加 Frame 容器组件      
        windowForm.addChildComponent(frame);
				//...省略其他代码
        Component textBook2 = new TextBox("记住用户名");
  			//Frame添加子组件
        frame.addChildComponent(textBook2);
        
				//执行打印
        windowForm.getComponentPrinter().print(windowForm);
    }

print WinForm(WINDOW窗口)
print Picture(LOGO图片)
print Picture(登录)
print Picture(注册)
print Frame(FRAME1)
print Label(用户名)
print TextBox(文本框)
print Label(密码)
print PasswordBox(密码框)
print CheckBox(复选框)
print TextBox(记住用户名)
print LinkLable(忘记密码)