GitHub user jkbradley opened a pull request:
https://github.com/apache/spark/pull/12711
[SPARK-12301][ML] Made all tree and ensemble classes not final
## What changes were proposed in this pull request?
There have been continuing requests (e.g., SPARK-7131) for allowing users
to extend and modify MLlib models and algorithms.
This PR makes tree and ensemble classes, Node types, and Split types in
spark.ml no longer final. This matches most other spark.ml algorithms.
Constructors for models are still private since we may need to refactor how
stats are maintained in tree nodes.
## How was this patch tested?
Existing unit tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/jkbradley/spark final-trees
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12711.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 #12711
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commit c328e953b7d7199e68bb0fc6c28fdc8f94bcad95
Author: Joseph K. Bradley <[email protected]>
Date: 2016-04-26T20:06:02Z
Made all tree and ensemble classes not final
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