work/CompositeShape.java

package challenge;

import basic.Shape;
import advanced.Resizable;
import java.util.ArrayList;
import java.util.List;

/**
 * 复合图形类，实现Shape接口和Resizable接口，用于组合多个图形
 */
public class CompositeShape implements Shape, Resizable {
    private String color;
    private String name;
    private List<Shape> shapes;
    
    /**
     * 构造方法
     * @param name 复合图形的名称
     * @param color 复合图形的颜色
     */
    public CompositeShape(String name, String color) {
        this.name = name;
        this.color = color;
        this.shapes = new ArrayList<>();
    }
    
    /**
     * 添加子图形
     * @param shape 要添加的图形
     */
    public void addShape(Shape shape) {
        if (shape != null) {
            shapes.add(shape);
        }
    }
    
    /**
     * 移除子图形
     * @param shape 要移除的图形
     * @return 如果移除成功则返回true，否则返回false
     */
    public boolean removeShape(Shape shape) {
        return shapes.remove(shape);
    }
    
    /**
     * 移除所有子图形
     */
    public void clearShapes() {
        shapes.clear();
    }
    
    /**
     * 获取子图形列表
     * @return 子图形列表
     */
    public List<Shape> getShapes() {
        return new ArrayList<>(shapes); // 返回副本，防止外部修改
    }
    
    @Override
    public String getColor() {
        return color;
    }
    
    @Override
    public double getArea() {
        double totalArea = 0.0;
        for (Shape shape : shapes) {
            totalArea += shape.getArea();
        }
        return totalArea;
    }
    
    @Override
    public void display() {
        System.out.println("CompositeShape [name=" + name + ", color=" + color + ", totalShapes=" + shapes.size() + ", totalArea=" + getArea() + "]");
        System.out.println("  子图形列表:");
        for (int i = 0; i < shapes.size(); i++) {
            System.out.print("  " + (i + 1) + ". ");
            shapes.get(i).display();
        }
    }
    
    @Override
    public void enlarge(double factor) {
        if (factor > 0) {
            for (Shape shape : shapes) {
                if (shape instanceof Resizable) {
                    ((Resizable) shape).enlarge(factor);
                }
            }
        }
    }
    
    @Override
    public void shrink(double factor) {
        if (factor > 0 && factor < 1) {
            for (Shape shape : shapes) {
                if (shape instanceof Resizable) {
                    ((Resizable) shape).shrink(factor);
                }
            }
        }
    }
    
    @Override
    public String getSizeInfo() {
        return "CompositeShape '" + name + "' with " + shapes.size() + " shapes, total area: " + getArea();
    }
    
    /**
     * 获取复合图形的名称
     * @return 名称
     */
    public String getName() {
        return name;
    }
    
    /**
     * 设置复合图形的名称
     * @param name 新的名称
     */
    public void setName(String name) {
        this.name = name;
    }
    
    /**
     * 设置颜色
     * @param color 新的颜色
     */
    public void setColor(String color) {
        this.color = color;
    }
    
    /**
     * 获取子图形的数量
     * @return 子图形数量
     */
    public int getShapeCount() {
        return shapes.size();
    }
}