Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/350#discussion_r24167714
--- Diff: docs/programming_guide.md ---
@@ -2398,6 +2399,61 @@ of a function, or use the `withParameters(...)`
method to pass in a configuratio
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+Passing parameters to functions
+-------------------
+
+Parameters can be passed to rich functions using either the constructor
(if the function is
--- End diff --
Only the Configuration object method requires a RichFunction to overwrite
`open()`. Configuring via the constructor (or any other method which sets
non-transient fields) works also for functions that implement the function
interfaces. Also it is not required that the class is defined as `static
final`. That is only necessary if the class is defined inside another class.
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