package server.business.filter;
public abstract class Filter {
	private Filter next;
	public void setNext(Filter f){
		this.next=f;
	}
	public String doFilter(String userName,String password1,String password2,String name,String classNumber,String email,String phone){
		if (next!=null) return next.doFilter(userName,password1,password2,name,classNumber,email,phone);
		else return "success";
	}
}