NIFI-13988 Refactored number handling to account for a blank string and treat it as a null when the inferred type is a number.

[dan-s1]

Summary

NIFI-13988

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  • JDK 21

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[exceptionfactory]

Thanks for implementing this improvement @dan-s1. The general approach of treating an empty string as null for numbers looks good.

Based on the usage, it looks like the string == null check is unnecessary since it should never be null based on the existing uses.

[exceptionfactory]

Thanks for making the adjustments @dan-s1, looks good! +1 merging