Add UniformEnumValueNameCheck

[pbaranchikov]

This check should accept multiple regular expressions for enum values and validate names to conform certain conventions but only one convention in one enum.

[romani]

Thanks a lot.

UniformEnumValueCheck

https://docs.oracle.com/javase/specs/jls/se7/html/jls-8.html#jls-8.9

"EnumConstant" ! We follow jdk names as much as possible.

public void visitToken(DetailAST ast)

logic should be simple but looks very complicated. Need to be re-factored to be a might be less efficient but friendly for human.

please make it like:

enumValueTokens = getTokensbyType(TokenType.ENUM_CONSTANT_DEF);
final String enumName =  ....
BitSet matches = matchPatterns(enumName);
if (matches.isEmpty || matches.cardinality > 1) {
....

https://docs.oracle.com/javase/7/docs/api/java/util/BitSet.html#cardinality%28%29

such update will resolve extra "return" and extra "continue".

I need separate PR for gh-pages branch, https://github.com/sevntu-checkstyle/sevntu.checkstyle/wiki/List-of-files-that-need-to-be-updated-for-new-field-or-new-Check-implementation

[romani]

fix is merged.