Add PropertyNamingStrategy.LOWER_DOT_CASE for dot-delimited names

[zenglian]

Add JsonPropertyNamingStrategy.LOWER_CASE_WITH_DOTS for dot-delimited names, which is widely used as configuration properties name, by many applications/products like hadoop, spark, etc.

[zenglian]

An example:

{
  "monitor.interval": 120,
  "monitor.max.retries": 100,
  "monitor.emails": "",
  "server.address": "0.0.0.0",
  "server.port": 8091,
  "server.max.connections": 10,
  "jdbc.driver": "org.h2.Driver",
  "jdbc.url": "jdbc:h2:tcp://slc09woc:19092/h2-db",
  "jdbc.auth": {
    "user": "user",
    "password": "password"
  }
}

See Add FieldNamingPolicy.LOWER_CASE_WITH_DOTS in gson

[cowtowncoder]

Sounds reasonable. This should probably go in 2.10: would it be possible to make PR against that branch?

Other than that, one thing we need (unless done already), is CLA for the first contribution.
Document can be found here:

https://github.com/FasterXML/jackson/blob/master/contributor-agreement.pdf

and usually you can print it, fill & sign, scan, email to info at fasterxml dot com.
When we have that, I can merge this against 2.10 (and I can do any minor cleanup), and it'll be added.

Thank you for contribution!

[zenglian]

I signed it with touch-screen and mailed it.

Some other issues:

• The source code does not have a consistent formatting style. The most significant is that the { is on or not on the new line.
• SnakeCaseStrategy can reuse the same translate function of KebabCaseStrategy.

[cowtowncoder]

I'll manually merge this; will change name (initially to LOWER_DOT_CASE -- unless I can find something widely used similar to "kebab case" and "camel case" :) ).

Thank you for providing this, esp. tests! I hope to get merge completed today.

[cowtowncoder]

Merged manually: will be in 2.10.0.

Thank you @zenglian for contributing this!

[zenglian]

Thanks.
I think the name is good as it's straight forward, e.g., I did not know what is "kebab case" but I did know what is "hyphen".

[cowtowncoder]

Matter of taste, I suppose, but I do like bit more lively names like "snake case", "camel case" and, at that point, "kebab case". There are obviously many other alternatives wrt hyphenated etc.
But since no one proposed any witty alternative, "(lower) dot case" it is!