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Copy pathShapeCache.java
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30 lines (23 loc) · 850 Bytes
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package prototype;
import prototype.shapte.Circle;
import prototype.shapte.Rectangle;
import prototype.shapte.Shape;
import java.util.Hashtable;
public class ShapeCache {
private static Hashtable<String, Shape> shapeMap = new Hashtable<String, Shape>();
public static Shape getShape(String shapeId) {
Shape shapeCache = shapeMap.get(shapeId);
return (Shape) shapeCache.clone();
}
// 对每种形状都运行数据库查询，并创建该形状
// shapeMap.put(shapeKey, shape);
// 例如，我们要添加三种形状
public static void loadCache() {
Circle circle = new Circle();
circle.setId("1");
shapeMap.put(circle.getId(), circle);
Rectangle rectangle = new Rectangle();
rectangle.setId("2");
shapeMap.put(rectangle.getId(), rectangle);
}
}