FilterInfo.java 文件源码

public FilterInfo(final String name, final Class<? extends Filter> filterClass) {
    if (name == null) {
        throw UndertowServletMessages.MESSAGES.paramCannotBeNull("name");
    }
    if (filterClass == null) {
        throw UndertowServletMessages.MESSAGES.paramCannotBeNull("filterClass", "Filter", name);
    }
    if (!Filter.class.isAssignableFrom(filterClass)) {
        throw UndertowServletMessages.MESSAGES.filterMustImplementFilter(name, filterClass);
    }
    try {
        final Constructor<Filter> ctor = (Constructor<Filter>) filterClass.getDeclaredConstructor();
        ctor.setAccessible(true);
        this.instanceFactory = new ConstructorInstanceFactory<>(ctor);
        this.name = name;
        this.filterClass = filterClass;
    } catch (NoSuchMethodException e) {
        throw UndertowServletMessages.MESSAGES.componentMustHaveDefaultConstructor("Filter", filterClass);
    }
}