NIFI-14808 Introduce MockParameterLookup class for parameters passing

[kubaugust]

Summary

NIFI-14808

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  • JDK 21

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[sfc-gh-dhandermann]

Thanks for proposing this improvement @kubaugust. Most of the changes look straightforward. The only concern I noted is the ambiguity of the two-argument constructor. Although the MockValidationContext has minimal direct use in the project, it could also be used outside, and requiring the disambiguation is not optimal for compatibility. Eliminating that and simply supporting the three-argument constructor with the ParameterLookup instance should resolve both issues. That should remove the need to change other classes as well, so those changes can be reverted.

[sfc-gh-dhandermann]

Although the Map<String, String> of parameters is convenient, it is not necessarily intuitive for all use cases, so I recommend removing this constructor. Removing it also eliminates the need to disambiguate existing usage of null for the StateManager.

[kubaugust]

Thanks David for noticing! Indeed, this might be a bit unintuitive... Removed this constructor

[exceptionfactory]

Thanks for this addition to the nifi-mock library @kubaugust, the latest version looks good! +1 merging