using getFlowVariable in Java Edit Variable for integer variables

[David_Ko]

Hi

I'm trying to get edit a flow variable which may or may not be present. I am using an Edit Flow Variable node, and using getFlowVariable() method. This works for string variables, but I am having trouble with integer variable. It comes back with a "An error occured in an expression wiht output flow variables."

I tired different ways to see how this may work, initially using 

Integer i = getFlowVariable("name","tInt");

this created an error that the ype between getFlowVariable() and i is wrong, so I switched to try

String s = getFlowVariable("name","tInt");

This is accepting by the node, but fails to run. I then tried

 

String s = getFlowVariable("name","tString");

and this didn't work either.

How can I get a flow variable by name for an integer variable?

 

David

 

• flow_variable_problem.zip

[marco_ghislanzoni]

I have to admit the description of the Java Edit Variable node is a tad unclear. Anyway this works for me:

int i = 0;
i = getFlowVariable("name", i);

also with String or double, provided the output type is also set accordingly.

Cheers,
Marco.

[David_Ko]

Hi Marco

I see, so the type is a variable of the type, not a string of the type. Could the description be corrected, especially where it says the types are tString, tInt, and tDouble?

Thanks for your help.

David

 

[marco_ghislanzoni]

That would indeed be a good suggestion for the folks at KNIME! :-)

I am sure they will read this and adjust the description of the node to make it clearer.

Cheers,
Marco.