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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Commented] (BEAM-1223) Add static factory methods for Sum.[*]Fn classes
Date Sun, 01 Jan 2017 15:14:58 GMT


ASF GitHub Bot commented on BEAM-1223:

GitHub user staslev opened a pull request:

    [BEAM-1223] Introduced Sum,Min,Max#ofLongs()/ofDoubles()/ofIntegers()…

    Be sure to do all of the following to help us incorporate your contribution
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    R: @lukecwik 
    About half way into this I was questioning the benefit-cost ratio, but since consistency
is what this PR is all about I figured bailing out would not be appropriate. 
    Let me know how it looks.

You can merge this pull request into a Git repository by running:

    $ git pull BEAM-1223-Add-static-factory-methods-for-CombineFn-classes

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1723
commit 70f8db4021b7c9e49a280edb740667ae67224ef7
Author: Stas Levin <>
Date:   2017-01-01T11:58:32Z

    [BEAM-1223] Introduced Sum,Min,Max#ofLongs()/ofDoubles()/ofIntegers() and eliminated the
direction instantiation of the corresponding classes.


> Add static factory methods for Sum.[*]Fn classes
> ------------------------------------------------
>                 Key: BEAM-1223
>                 URL:
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-core
>            Reporter: Stas Levin
>            Assignee: Stas Levin
>            Priority: Minor
> {{Sum.SumDoubleFn}}, {{SumIntegerFn}} and {{SumLongFn}} are not using the {{X.of()}}
or {{X.from()}} or other instance creation via static method patterns that are ubiquitous
in Beam.
> Following a discussion on the dev list, it would be great to preserve a consistent look
and feel and change the creation patterns for these classes to something like {{SumFn.ofLong()}}

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