package com.ocean;
/**
 * 抽象构件
 */
public abstract class Component {
    protected String name;
    public Component(String name){
        this.name = name;
    }
    public abstract void print();
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Component component = (Component) o;
        return name.equals(component.name);
    }
    @Override
    public int hashCode() {
        return Objects.hash(name);
    }
}

package com.ocean;
import java.util.*;
/**
 * 树枝构件
 */
public class Composite extends Component {
    public Composite(String name) {
        super(name);
    }
    /**
     * 构件容器
     */
    private Set<Component> components = new LinkedHashSet<>();
    /**
     * 增加一个叶子构件或分支构件
     * @param component
     */
    public void add(Component component){
        this.components.add(component);
    }
    public void remove(Component component){
        this.components.remove(component);
    }
    public Set<Component> getChilden(){
        return this.components;
    }
    @Override
    public void print() {
        System.out.println("print " + this.name);
        for(Component c : this.getChilden()){
            c.print();
        }
    }
}

package com.ocean;
/**
 * 树叶构件
 */
public class Leaf extends Component {
    public Leaf(String name) {
        super(name);
    }
    @Override
    public void print() {
        System.out.println("print " + this.name);
    }
}

package com.ocean;
public class Client {
    public static void main(String[] args) {
        Composite window =  createWindow();
        print(window);
    }
    public static Composite createWindow(){
        Composite root = new Composite("WinForm(WINDOW窗口)");
        root.add(new Composite("Picture(LOGO图片)"));
        root.add(new Leaf("Button(登录)"));
        root.add(new Leaf("Button(注册)"));
        Composite formGroup = new Composite("Frame(FRAME1)");
        formGroup.add(new Leaf("Label(用户名)"));
        formGroup.add(new Leaf("TextBox(文本框)"));
        formGroup.add(new Leaf("Label(密码)"));
        formGroup.add(new Leaf("PasswordBox(密码框)"));
        formGroup.add(new Leaf("CheckBox(复选框)"));
        formGroup.add(new Leaf("TextBox(记住用户名)"));
        formGroup.add(new Leaf("Label(忘记密码)"));
        root.add(formGroup);
        return root;
    }
    
    public static void print(Composite composite){
        composite.print();
    }
}