MessagePartRequestHandler.java 文件源码

@Override
public Result load(Request request, int networkPolicy) throws IOException {
    Queryable queryable = mLayerClient.get(request.uri);
    if (!(queryable instanceof MessagePart)) return null;
    MessagePart part = (MessagePart) queryable;
    if (part.isContentReady()) return new Result(part.getDataStream(), LoadedFrom.DISK);
    if (!Util.downloadMessagePart(mLayerClient, part, 3, TimeUnit.MINUTES)) return null;
    return new Result(part.getDataStream(), LoadedFrom.NETWORK);
}