[Java][jaxrs-spec] Make contextPath template parameter available as a string constant for use in @ApplicationPath

[shamus13]

This PR extends the jaxrs-spec template creators to generate a class RestResourceRoot.java with a single string constant ROOT with the content of the template parameter `contextPath'. Secondly the existing generation of RestApplication.java has been updated to make use of this constant in its '@ApplicationPath' annotation. This PR relates to #13374

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[wing328]

thanks for the PR. one question from me is why do we need to store this ROOT separately in another class?

can you store it in RestApplication for example instead?

[shamus13]

I am using interface only, so that i can provide my own RestApplication class, where i add a bunch of exception mappers and such.

The variable could of course be defined in RestApplication, when that class is generated. In the interface only cases, i think, it would be odd to generate a RestApplication class without the @ApplicationPath annotation to hold this ROOT constant, that i am proposing. Btw perhaps APPLICATION_PATH would be a better name for this constant?

[wing328]

Btw perhaps APPLICATION_PATH would be a better name for this constant?

yes, please rename it.

[wing328]

when ready, please PM me via slack for review and merged.

[shamus13]

@wing328 I have updated my pull request with a simple renaming of the constant as suggested. Can't message you on Slack though, since i do not have it installed or even have an account.