GitHub user anthonycorbacho opened a pull request:
https://github.com/apache/zeppelin/pull/1697
[ZEPPELIN-1352] Refactor Notebook repo versioning to return Revision Empty
instead of NULL
### What is this PR for?
In Zeppelin notebookRepo, versioning (checkpoint, get, revisionHistory) use
to return NULL.
It will be better to return Empty (Revision or list).
### What type of PR is it?
[Improvement]
### What is the Jira issue?
* [ZEPPELIN-1352](https://issues.apache.org/jira/browse/ZEPPELIN-1352)
### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/anthonycorbacho/incubator-zeppelin
ZEPPELIN-1352
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/1697.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1697
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commit 989a9953f0f36c366ffb335f8017e566746259f8
Author: Anthony Corbacho <corbacho.anth...@gmail.com>
Date: 2016-11-27T14:09:28Z
Add to Revision class a static final empty object that will be used to
return empty revision instad of null
commit 5127961c45cbf2c1f3985f5427e1b7417150b2be
Author: Anthony Corbacho <corbacho.anth...@gmail.com>
Date: 2016-11-27T14:10:04Z
Change logic to return Empty (Revision or Collection) instead of null
commit 058b3e778bf371a3378f0cd75213ec8cb42b7831
Author: Anthony Corbacho <corbacho.anth...@gmail.com>
Date: 2016-11-27T14:12:08Z
Apply return empty revision instead of null in zeppelinhub notebook repo
commit 974c97631b9643e5df828db735ca441dfec04f18
Author: Anthony Corbacho <corbacho.anth...@gmail.com>
Date: 2016-11-28T02:31:10Z
Fix test in GitNotebookRepo
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