HashMap as return value from Java method in R?

Question

Is it possible to return a HashMap to R with the rJava extension of R? E.g. I have a method in Java, which returns a HashMap and I want this HashMap use in R. I tried:

.jcall(javaObj, "Ljava/util/HashMap", "getDbInfoMap")

This doesn't work.
Do I have to put everything into a String[], that I want to pass to R from Java? Or is there another possibility?

Any help/info on this would be greatly appreciated.

It is a GNU Project, which is similar to S.

Martin
– Martin

2010-03-18 17:30:07 +00:00
Commented Mar 18, 2010 at 17:30 — Martin
– Martin, Commented Mar 18, 2010 at 17:30

nicerobot · Accepted Answer · 2010-03-16 19:25:40Z

2

You're missing a semi-colon when specifying the HashMap return type.

.jcall(javaObj, "Ljava/util/HashMap;", "getDbInfoMap")

See JNI Types Field Descriptors and examples of .jcall.

edited Mar 16, 2010 at 19:25

answered Mar 16, 2010 at 19:20

nicerobot

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