是谁调用了它的静态方法？

我该如何知道是哪个子类调用了它的静态方法？有必要吗？

//ActiveRecord.java
[code]
public abstract class ActiveRecord {

public static int count() {
//我应该如何知道，Xxx.count()中的Xxx实际是什么类？
//假如java在此可以使用关键字class，用以表示实际调用该静态方法的类：
Class targetClass = class;
String hql = "select count(*) from " + targetClass.getSimpleName()
+ " where " + propertyName + "=?";
List list = theStaticHibernateTemplate.find(hql, value);
return (Integer) list.get(0);
}

}
[/code]

[code]
//Entity.java

@MappedSuperclass
public abstract class Entity extends ActiveRecord {
...
}

//User.java
@Entity
public User extends Entity {...}

//Topic.java
@Entity
public Topic extends Entity {...}[/code]


//XxxAction.java
[code]
public void someMethod(){
//ActiveRecord.count中的targetClass 将是User.class
int userCount = User.count();

//ActiveRecord.count中的targetClass 将是Topic.class
int topicCount = Topic.count();
}[/code]

我如何完成如上的做法？