topic Re: how to read list return from method in dll using tDotNETRow in Talend Studio

how to read list return from method in dll using tDotNETRow

abhinav5 — Sat, 16 Nov 2024 04:37:01 GMT

I am trying to read list<String> return from method in dll ,but got error in transforming datatype. Stacktrace is

Exception in component tDotNETRow_1 (DllUtility)
java.lang.NullPointerException
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.talend.net.Object$Helper.convert(Object.java:141)
at org.talend.net.Object.invokeGeneric(Object.java:517)
at talend_poc.dllutility_0_1.DllUtility.tDotNETRow_1Process(DllUtility.java:721)
at talend_poc.dllutility_0_1.DllUtility.tDotNETInstantiate_1Process(DllUtility.java:403)
at talend_poc.dllutility_0_1.DllUtility.runJobInTOS(DllUtility.java:1096)
at talend_poc.dllutility_0_1.DllUtility.main(DllUtility.java:946)

Please let me know how we can display this list or export in file.

Re: how to read list return from method in dll using tDotNETRow

fdenis — Fri, 20 Sep 2019 10:57:24 GMT

for nullpointer run your job step by step to isolate error on java code.

Re: how to read list return from method in dll using tDotNETRow

abhinav5 — Fri, 20 Sep 2019 12:31:29 GMT

Hi @fdenis

Have you tried tdotnetcomponent in which method returns list type. could not able to find any example like that.

Thanks,

Abhinav

Re: how to read list return from method in dll using tDotNETRow

fdenis — Fri, 20 Sep 2019 13:04:29 GMT

no I do not test this component but java.lang.NullPointerException is a typique java error when a variables are not initialised.
variable are sometime due to a non closed string.