EmptyPayloadInterceptor.java 文件源码

@Override
public Object aroundReadFrom(ReaderInterceptorContext context) throws IOException, WebApplicationException {
    Object object = context.proceed();
    if (context.getProperty(EMPTY_PAYLOAD) != TRUE) {
        return object;
    }
    if (object instanceof Collection) {
        Collection<?> collection = (Collection<?>) object;
        if (collection.isEmpty()) {
            throw new EmptyPayloadException();
        }
    } else if (object instanceof Map) {
        Map<?, ?> map = (Map<?, ?>) object;
        if (map.isEmpty()) {
            throw new EmptyPayloadException();
        }
    } else if (object == null) {
        throw new EmptyPayloadException();
    }
    return object;
}