HandlerExecutionChain中为什么有两个interceptorList？一个array，一个list。

Question

如题，

public class HandlerExecutionChain {

    private static final Log logger = LogFactory.getLog(HandlerExecutionChain.class);

    private final Object handler;

    private HandlerInterceptor[] interceptors;

    private List<HandlerInterceptor> interceptorList;

请大神解答。