week3- 作业一

public interface Component {
  	/**
    * 输出内容
    **/
    void print();
}
public class BaseComponent implements Component {
    private final String text;
    private final String type;
    protected BaseComponent(String text, String type) {
        this.text = text;
        this.type = type;
    }
    public String getText() {
        return text;
    }
    public String getType() {
        return type;
    }
    @Override
    public void print() {
        System.out.println(String.format("print %s(%s)", getType(), getText()));
    }
}
public interface ListableComponent extends Component {
    /**
     * 添加组件
     *
     * @param component
     */
    void addComponent(Component component);
}
public class BaseListableComponent extends BaseComponent implements ListableComponent {
    private List<Component> children;
    protected BaseListableComponent(String text, String type) {
        super(text, type);
        children = new ArrayList<>();
    }
    @Override
    public void addComponent(Component component) {
        this.children.add(component);
    }
    @Override
    public void print() {
        super.print();
        for (Component child : children) {
            child.print();
        }
    }
}
public interface ComponentFactory {
    /**
     * 构建组件
     *
     * @param text
     * @return
     */
    Component build(String text);
}
public enum ComponentType implements ComponentFactory {
    Button(new ComponentFactory() {
        @Override
        public Component build(String text) {
            return new BaseComponent(text, Button.name());
        }
    }),
    Picture(new ComponentFactory() {
        @Override
        public Component build(String text) {
            return new BaseComponent(text, Picture.name());
        }
    }),
    WinForm(new ComponentFactory() {
        @Override
        public Component build(String text) {
            return new BaseListableComponent(text, WinForm.name());
        }
    }),
    Frame(new ComponentFactory() {
        @Override
        public Component build(String text) {
            return new BaseListableComponent(text, Frame.name());
        }
    }),
    Label(new ComponentFactory() {
        @Override
        public Component build(String text) {
            return new BaseComponent(text, Label.name());
        }
    }),
    TextBox(new ComponentFactory() {
        @Override
        public Component build(String text) {
            return new BaseComponent(text, TextBox.name());
        }
    }),
    PasswordBox(new ComponentFactory() {
        @Override
        public Component build(String text) {
            return new BaseComponent(text, PasswordBox.name());
        }
    }),
    CheckBox(new ComponentFactory() {
        @Override
        public Component build(String text) {
           return new BaseComponent(text, CheckBox.name());
        }
    }),
    LinkLabel(new ComponentFactory() {
        @Override
        public Component build(String text) {
            return new BaseComponent(text, LinkLabel.name());
        }
    })
    ;
    private final ComponentFactory factory;
    ComponentType(ComponentFactory factory) {
        this.factory = factory;
    }
    public static ComponentType nameOf(String name) {
        return ComponentType.valueOf(ComponentType.class, name);
    }
    @Override
    public Component build(String text) {
        return factory.build(text);
    }

public class ComponentMain {
    public static void main(String[] args) {
        String[][] components = {
                {"WinForm", "WINDOW窗口"},
                {"Picture", "LOGO图片"},
                {"Button", "登录"},
                {"Button", "注册"},
                {"Frame", "FRAME1"},
                {"Label", "用户名"},
                {"TextBox", "文本框"},
                {"Label", "密码"},
                {"PasswordBox", "密码框"},
                {"CheckBox", "复选框"},
                {"TextBox", "记住用户名"},
                {"LinkLabel", "忘记密码"}
        };
        Map<Integer, int[]> groupings = new HashMap<>();
        groupings.put(0, new int[]{1, 2, 3, 4});
        groupings.put(4, new int[]{5, 6, 7, 8, 9, 10, 11});
        Component root = buildRoot(components, groupings, 0);
        root.print();
    }
    private static Component buildRoot(String[][] components, Map<Integer, int[]> groupings, int rootIndex) {
        List<Component> componentList = new ArrayList<>(components.length);
        for (String[] component : components) {
            componentList.add(ComponentType.nameOf(component[0]).build(component[1]));
        }
        Component root = componentList.get(rootIndex);
        for (Map.Entry<Integer, int[]> entry : groupings.entrySet()) {
            Component parent = componentList.get(entry.getKey());
            if (!(parent instanceof ListableComponent)) {
                throw new IllegalStateException("组件类型错误");
            }
            ListableComponent her = (ListableComponent) parent;
            for (int i : entry.getValue()) {
                her.addComponent(componentList.get(i));
            }
        }
        return root;
    }
}