Github user mengxr commented on the pull request:
https://github.com/apache/spark/pull/8152#issuecomment-130822528
In Scala, we can use named arguments to help readability. But in Java, we
still need to guess what the arguments are.
~~~java
IndexToString idxToStr = indexer.getInverse("prediction",
"predictedLabels");
~~~
~~~java
IndexToString idxToStr = indexer.inverse()
.setInputCol("prediction")
.setOutputCol("predictedLabels");
~~~
My preference is to limit the ways users can specify parameters. If they
are already familiar with setters, the latter approach doesn't really introduce
overhead (assuming auto-completion) and users don't need to remember another
API to do the same thing.
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