KNIME - Java snippet - DoubleCell/Java type double []

Question

I have a problem with node containing this column type:

ListCell (Collection of: ListCell (Collection of: DoubleCell))

Data looks like this:

[[-0.518, -1.431], [-1.431, -0.518]]

Next node is Java Snippet. In input options, the only Java type option for this column is String, which is wrong as you can see:

ERROR Java Snippet Execute failed: java.lang.ClassCastException: java.lang.String cannot be cast to [Ljava.lang.Object;

Is there any solution for this problem?

Thanks for help.

That is what I think too. I posted this to KNIME forum, but nobody has answered yet: http://tech.knime.org/forum/knime-users/java-snippet-doublecelljava-type-double-problem Maybe it will be better to post it as bug. — jirinovo, Sep 18 '14 at 16:58

score 0 · Answer 1 · answered Sep 23 '14 at 07:39

0

The JavaSnippet node can handle collections of doubles, etc. but not collections of collections.

answered Sep 23 '14 at 07:39

Kilian

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score 0 · Accepted Answer · answered Sep 24 '14 at 12:26

Finally I got reply on KNIME forum (http://tech.knime.org/forum/knime-users/java-snippet-doublecelljava-type-double-problem)

Hi jirinovo,

the JavaSnippet node can handle collections of doubles, etc. but not collections of collections.

We will change the type definitions in the JavaSnippet node in order to handle this more dynamically and be more flexible. However this will take some time, probably until summer 2015 latest.

Cheers, Kilian

KNIME - Java snippet - DoubleCell/Java type double []

2 Answers2