GitHub user zhangminglei opened a pull request:
https://github.com/apache/flink/pull/5864
[FLINK-8661] Replace Collections.EMPTY_MAP with Collections.emptyMap()
## What is the purpose of the change
The use of Collections.EMPTY_SET and Collections.EMPTY_MAP often causes
unchecked assignment. It should be replaced with Collections.emptySet() and
Collections.emptyMap() .
## Brief change log
Change Collections.EMPTY_MAP and Collections.EMPTY_LIST to
Collections.emptyList() & Collections.emptyMap().
## Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhangminglei/flink flink-8661
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5864.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 #5864
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commit f021149aa73576a9a9fd05ba00fcf7e5d1901318
Author: zhangminglei <zml13856086071@...>
Date: 2018-04-18T01:24:57Z
[FLINK-8661] Replace Collections.EMPTY_MAP with Collections.emptyMap()
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